KR102256959B1 - System for providing online shopping service for school stationery linkage to elementary school class weekly syllabus - Google Patents

Abstract

The present invention provides a platform capable of buying stationary in a preparation material list linked to a weekly class syllabus in 360 degrees virtual reality (VR) showroom divided by each school year like shopping in an offline store. A system for providing online stationaly shopping service linked with a weekly class syllabus in an elementary school comprises: at least one school terminal to upload a weekly class syllabus by school year; a student terminal to register school, school year, name and address, to output a preparation material list included in the weekly class syllabus, and for accessing a 360 degrees VR showroom to buy and pay stationeries included in the preparation material list using a character; and a stationery shooping service providing server including a collecting unit to classify the weekly class syllabus registed from the at least one shool terminal by school and school year to collect classified weekly class syllabus, a storage unit for extracting the preparation material list included in the weekly class syllabus by school and school year to store the extracted preparation material list, and an output unit for extracting a preparation material list corresponding to school and school year when the student terminal inputs the school and the school year to output a preparation material icon to a stationery corresponding a preparation material list among at least one type of stationery disposed in 360 degrees VR showroom.

Description

Online stationery shopping service providing system linked with elementary school weekly study guide {SYSTEM FOR PROVIDING ONLINE SHOPPING SERVICE FOR SCHOOL STATIONERY LINKAGE TO ELEMENTARY SCHOOL CLASS WEEKLY SYLLABUS}

The present invention relates to a system for providing an online stationery shopping service linked with an elementary school weekly study guide, in which stationery in a list of preparations linked with a weekly study guide can be purchased in a 360-degree VR showroom separated for each grade, such as shopping at an offline store. Provides a platform that can be used.

The unpredictable COVID-19 outbreak in 2020 has changed our lives radically and extensively in just a few months. Curriculums such as universities, elementary, middle and high schools have been replaced online, and all meetings have been replaced by videoconferencing such as Zoom and Webex. Working from home has become a daily routine, and shopping and financial services have also been solved online and mobile. Even in communication with people, we met a situation where we had a LAN line coffee break and a LAN line dinner. In this way, the situation called Corona forced us to rapidly enter the non-face-to-face era, social distancing has become a new normal in life, and the era of with Corona is an era in which we must anticipate and prepare. Came. Many retailers have introduced the services of Drive Through and Curbside Pickup, and services that you buy online without even seeing the products you have seen and bought have been launched one after another.

At this time, a configuration for providing an online shopping mall by reproducing the offline store in VR and notifying the preparations by RFID has been researched and developed, respectively. In this regard, Korean Patent Publication No. 2013-0084274 (published on July 24, 2013), which is a prior art. ) And Korean Patent Laid-Open Patent No. 2009-0080771 (published on July 27, 2009), the offline store is implemented in VR, but the configuration of an online shopping mall where the user walks around the store and selects products, such as Road View and Street View. And, by attaching an RFID tag to the class textbook to manage class preparations using a backpack with an RFID reader built in, attach an RFID reader and process to the backpack, and then press the operation button attached to the backpack. Each reads the subject code from the RFID tag, transmits class preparation information, and notifies if there is no class textbook corresponding to the timetable.

However, the non-face-to-face injury also means an offline crisis. In addition to the sharp drop in sales of offline-oriented self-employed people, department stores and hypermarkets are also reporting bankruptcy or reducing their stores. In the U.S., about 50% of office stationery stores were closed, and ToysRUs, a representative of the toy industry, eventually applied for closure, and news of the bankruptcy of various famous brands poured out one after another. There are also forecasts that as many as 25,000 stores will be closed in 2020 and a desperate forecast that about 100,000 stores will be closed by 2025. Bankruptcy news and deficit news, which are difficult to list one by one, sparked skepticism about the model of the retail business that has been taken for granted. Accordingly, there is a need for research and development of a method to achieve win-win with offline stores while developing a platform such as an offline store through a 360-degree VR showroom.

An embodiment of the present invention creates a 360-degree VR showroom for each grade, like a stationery store, which is an offline store, and is linked with a weekly study guide issued by a school, so that the preparations are separately displayed among the phrases displayed in the VR showroom, so that the preparations are not forgotten. In addition, while registering each offline store as a member store's terminal, inventory data is registered along with the address, operating hours, and business name, so that when you need to prepare items in a hurry or when the shipping cost is more expensive than the offline store, the product is also available in offline stores. In this case, when the number of school days has been significantly reduced due to non-face-to-face use, a method of providing online stationery shopping services linked with weekly study guides for elementary schools that can provide a platform for sharing daily life among students bound by a human network will be provided. I can. However, the technical problem to be achieved by the present embodiment is not limited to the technical problem as described above, and other technical problems may exist.

As a technical means for achieving the above-described technical problem, an embodiment of the present invention registers at least one school terminal, school, grade, name and address for uploading a weekly study guide for each grade, and includes it in the weekly study guide. A student terminal that prints a list of prepared items, accesses a 360-degree Virtual Reality (VR) showroom provided for each grade, and uses a character to purchase and pay for the stationery included in the list of items, and at least one school terminal. A collection unit that classifies and collects study guides by school and grade, a storage unit that extracts and stores the list of preparations included in the weekly study guide by school and grade, and responds to school and grade when entering a school and grade from a student terminal. And a stationery shopping service providing server including an output unit that extracts a list of items to be prepared and outputs a preparation item icon to a phrase corresponding to the list of items to be prepared among at least one kind of phrases arranged in the 360-degree VR showroom provided for each grade.

According to any one of the above-described problem solving means of the present invention, a 360-degree VR showroom is created for each grade level, such as a stationery store, which is an offline store, and is linked with a weekly learning guide issued by the school, so that preparations among the phrases displayed in the VR showroom are By marking each offline store as a member store terminal and registering inventory data along with the address, operating hours, and business name, it is marked separately so that you can take it without forgetting. In this case, it is possible to purchase products in offline stores, and to provide a platform to share daily life among students bound by a human network when the number of school days is significantly reduced due to non-face-to-face.

1 is a diagram illustrating a system for providing an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a stationery shopping service providing server included in the system of FIG. 1.
3 and 4 are diagrams for explaining an embodiment in which an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention is implemented.
5 is a flowchart illustrating a method of providing an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "electrically connected" with another element interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further included, and one or more other features, not excluding other components, unless specifically stated to the contrary. It is to be understood that it does not preclude the presence or addition of any number, step, action, component, part, or combination thereof.

The terms "about", "substantially", and the like, as used throughout the specification, are used in or close to the numerical value when manufacturing and material tolerances specific to the stated meaning are presented, and are used to provide an understanding of the present invention. To assist, accurate or absolute numerical values are used to prevent unreasonable use of the stated disclosure by unscrupulous infringers. As used throughout the specification of the present invention, the term "step (to)" or "step of" does not mean "step for".

In the present specification, the "unit" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. Further, one unit may be realized by using two or more hardware, or two or more units may be realized by one piece of hardware. Meanwhile,'~ unit' is not meant to be limited to software or hardware, and'~ unit' may be configured to be in an addressable storage medium or configured to reproduce one or more processors. Thus, as an example,'~ unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays and variables. Components and functions provided in the'~ units' may be combined into a smaller number of elements and'~ units', or may be further separated into additional elements and'~ units'. In addition, components and'~ units' may be implemented to play one or more CPUs in a device or a security multimedia card.

In the present specification, some of the operations or functions described as being performed by a terminal, device, or device may be performed instead in a server connected to the terminal, device, or device. Likewise, some of the operations or functions described as being performed by the server may also be performed by a terminal, device, or device connected to the server.

In this specification, some of the operations or functions described as mapping or matching with the terminal means mapping or matching the unique number of the terminal or the identification information of the individual, which is the identification information of the terminal. Can be interpreted as.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a system for providing an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention. Referring to FIG. 1, an online stationery shopping service providing system 1 linked with an elementary school weekly study guide includes at least one student terminal 100, a stationery shopping service providing server 300, and at least one school terminal 400. And at least one affiliated store terminal 500. However, since the online stationery shopping service providing system 1 linked to the elementary school weekly study guide of FIG. 1 is only an embodiment of the present invention, the present invention is not limitedly interpreted through FIG. 1.

In this case, each component of FIG. 1 is generally connected through a network 200. For example, as shown in FIG. 1, at least one student terminal 100 may be connected to a stationery shopping service providing server 300 through a network 200. In addition, the stationery shopping service providing server 300 may be connected to at least one student terminal 100, at least one school terminal 400, and at least one affiliated store terminal 500 through the network 200. In addition, at least one school terminal 400 may be connected to the stationery shopping service providing server 300 through the network 200. In addition, at least one affiliated store terminal 500 may be connected to at least one student terminal 100, a stationery shopping service providing server 300, and at least one school terminal 400 through the network 200.

Here, the network refers to a connection structure in which information exchange is possible between each node such as a plurality of terminals and servers, and examples of such networks include a local area network (LAN) and a wide area communication network (WAN: Wide Area Network), Internet (WWW: World Wide Web), wired/wireless data communication network, telephone network, wired/wireless television communication network, etc. Examples of wireless data communication networks include 3G, 4G, 5G, 3rd Generation Partnership Project (3GPP), 5th Generation Partnership Project (5GPP), Long Term Evolution (LTE), World Interoperability for Microwave Access (WIMAX), and Wi-Fi. , Internet, LAN(Local Area Network), Wireless LAN(Wireless Local Area Network), WAN(Wide Area Network), PAN(Personal Area Network), RF(Radio Frequency), Bluetooth(Bluetooth) network, NFC( Near-Field Communication) network, satellite broadcasting network, analog broadcasting network, Digital Multimedia Broadcasting (DMB) network, and the like are included, but are not limited thereto.

In the following, the term'at least one' is defined as a term including the singular number and the plural number, and even if the term'at least one' does not exist, each component may exist in the singular or plural, and may mean the singular or plural. It will be self-evident. In addition, it will be possible to change according to the embodiment that each component is provided in the singular or plural.

At least one student terminal 100 sets and enters a character in the 360-degree VR showroom for each grade by using an online stationery shopping service related web page, app page, program or application linked with the elementary school weekly study guide, and enters the desired phrase It may be a terminal of an elementary school student who selects and purchases and pays. In addition, at least one student terminal 100 forms a personal network with the other at least one student terminal 100, shares daily life as a feed, puts desired phrases in a wish list, and places other student terminals 100 or It may be a terminal that allows a parent terminal (not shown) to make an alternative payment. In addition, the at least one student terminal 100 may be a terminal capable of buying or selling used goods through the stationery shopping service providing server 300.

Here, the at least one student terminal 100 may be implemented as a computer that can access a server or terminal in a remote location through a network. Here, the computer may include, for example, a navigation system, a notebook equipped with a web browser, a desktop, a laptop, and the like. In this case, the at least one student terminal 100 may be implemented as a terminal capable of accessing a remote server or terminal through a network. At least one student terminal 100, for example, as a wireless communication device that is guaranteed portability and mobility, navigation, PCS (Personal Communication System), GSM (Global System for Mobile communications), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) ) It may include all kinds of handheld-based wireless communication devices such as terminals, smart phones, smart pads, and tablet PCs.

The stationery shopping service providing server 300 may be a server that provides an online stationery shopping service web page, an app page, a program, or an application linked with an elementary school weekly study guide. In addition, the stationery shopping service providing server 300 registers at least one affiliated store terminal 500 and displays the stationery using the stationery data registered by the affiliated store terminal 500 in a 360-degree VR showroom for each grade. Together, it may be a server that stores virtual reality content. In addition, the stationery shopping service providing server 300 may be a server that collects a weekly study guide or weekly study plan uploaded from at least one school terminal 400, extracts a list of preparations for each school and grade, and builds a database. have. And, the stationery shopping service providing server 300, when the student terminal 100 is connected to register a school and a grade, the phrase to be packed in each week among the phrases displayed in the 360-degree VR showroom is a "prepare" icon It may be a server that overlays. In addition, the stationery shopping service providing server 300 may be a server for starting a delivery process by transmitting payment data to at least one affiliated store terminal 500 when purchasing and paying for stationery in the student terminal 100.

Here, the stationery shopping service providing server 300 may be implemented as a computer capable of accessing a remote server or terminal through a network. Here, the computer may include, for example, a navigation system, a notebook equipped with a web browser, a desktop, a laptop, and the like.

The at least one school terminal 400 may be a doctor's terminal using a web page, an app page, a program, or an application related to an online stationery shopping service linked to an elementary school weekly study guide. In addition, the at least one school terminal 400 may be a teacher terminal of a school that uploads weekly study guides for each grade.

Here, the at least one school terminal 400 may be implemented as a computer that can access a remote server or terminal through a network. Here, the computer may include, for example, a navigation system, a notebook equipped with a web browser, a desktop, a laptop, and the like. In this case, the at least one school terminal 400 may be implemented as a terminal capable of accessing a remote server or terminal through a network. At least one school terminal 400, for example, as a wireless communication device that is guaranteed portability and mobility, navigation, PCS (Personal Communication System), GSM (Global System for Mobile communications), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) ) It may include all kinds of handheld-based wireless communication devices such as terminals, smart phones, smart pads, and tablet PCs.

The at least one affiliated store terminal 500 may be a terminal of an online or offline store that uploads stationery data using an online stationery shopping service related web page, app page, program, or application linked with an elementary school weekly study guide. At this time, when the affiliated store terminal 500 is a terminal of an offline store, real-time inventory data and operating hours are uploaded to the stationery shopping service providing server 300, so that when a student urgently prepares supplies, etc. It may be a terminal that allows you to find and live. Here, the affiliated store terminal 500 may be a terminal that outputs the pickup time of the student terminal 100 when an online to offline (O2O) payment is made, and may be a terminal that reduces inventory data by interlocking with payment data.

Here, the at least one affiliated store terminal 500 may be implemented as a computer capable of accessing a remote server or terminal through a network. Here, the computer may include, for example, a navigation system, a notebook equipped with a web browser, a desktop, a laptop, and the like. In this case, the at least one affiliated store terminal 500 may be implemented as a terminal capable of accessing a remote server or terminal through a network. At least one affiliated store terminal 500 is, for example, a wireless communication device with guaranteed portability and mobility, and includes navigation, Personal Communication System (PCS), Global System for Mobile communications (GSM), Personal Digital Cellular (PDC), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) ) It may include all kinds of handheld-based wireless communication devices such as terminals, smart phones, smart pads, and tablet PCs.

FIG. 2 is a block diagram illustrating a stationery shopping service providing server included in the system of FIG. 1, and FIG. 3 is an implementation of an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention. It is a figure for explaining an embodiment.

Referring to FIG. 2, the stationery shopping service providing server 300 includes a collection unit 310, a storage unit 311, an output unit 313, a character unit 320, a guide unit 330, and an O2O payment unit ( 340), a social media unit 350, a delivery management unit 360, a prediction unit 370, a gift-giving unit 380, and a second-hand market unit 390.

Stationery shopping service providing server 300 according to an embodiment of the present invention or another server (not shown) that operates in conjunction with at least one student terminal 100, at least one school terminal 400, and at least one affiliate store When transmitting an online stationery shopping service application, program, app page, web page, etc. linked with the elementary school weekly study guide to the terminal 500, at least one student terminal 100, at least one school terminal 400, and at least One affiliated store terminal 500 may install or open an online stationery shopping service application, program, app page, web page, etc. linked with the elementary school weekly study guide. In addition, a service program may be driven in at least one student terminal 100, at least one school terminal 400, and at least one affiliated store terminal 500 by using a script executed in a web browser. Here, the web browser is a program that enables you to use the Web (WWW: World Wide Web) service, which means a program that receives and displays hypertext described in HTML (Hyper Text Mark-up Language). For example, Netscape , Explorer, Chrome, etc. In addition, the application refers to an application program on the terminal, and includes, for example, an app executed on a mobile terminal (smart phone).

Referring to FIG. 2, the collection unit 310 may classify and collect weekly study guidebooks registered by at least one school terminal 400 by school and grade. At least one school terminal 400 may upload a weekly study guide for each grade. Initially, the collected data may not have a large number or types of data, but as it continues to accumulate, even if the curriculum changes, it is possible to predict the type and range of necessary preparations. Since each preparation is collected for each weekly, it is possible to collect time-series data, and after that, it is possible to predict the demand by region for the type and quantity of phrases included in the preparation, and the basis for predicted delivery (pre-delivery). Can be chopped. At this time, predictive delivery means that each student arranges a list of items to buy in advance at the corresponding branch distribution center according to the time when the items are needed, and when the student terminal 100 places an order, [Seller-Logistics Center-Logistics Center Hub-Logistics Center -It is not delivered to the destination agency-student], but is delivered to the [logistics center-destination agency-student], so not only the next business day but also same day delivery is possible.

If each school terminal 400 is not included as a component of the system of the present invention, the collection unit 310 may collect and store weekly study guides through a web crawler. A web crawler for web crawling is a computer program that navigates the world wide web in an organized and automated way. The work done by web crawlers is called WebCrawling or Spidering, and is a form of bot or software agent. Web crawlers are largely divided into general web crawlers and distributed web crawlers.

To explain the basic behavior of a web crawler, it starts by fetching the URL from the URL Frontier module and fetching the web page of that URL using the HTTP protocol. The fetch module then stores the web page in a temporary storage, the parser module extracts the text and links, and the text is sent to the indexer. In the case of a link, whether it should be added to the URL frontier is determined through Content Seen, URL Filter, and Duplication URL Element modules. At this time, since it is virtually impossible to crawl all of the web documents with a general web crawler, a distributed web crawler can be used more.

Distributed web crawlers are largely divided into two types, one of which is centralized and the other is P2P (or Fully-Distributed). In a centralized distributed web crawler, the URL manager acts as a server and the crawler acts as a client. When the document is downloaded from the crawler, the OutLink URL is extracted and passed to the URL manager, the URL manager checks whether the downloaded document is the URL and removes the duplicate URL. In other words, the URL manager takes over for URL duplication and URL management in general web crawlers. On the other hand, in the P2P method, each crawler has a completely independent structure. In the P2P method, each crawler operates like a general web crawler. Each crawler downloads a document, extracts OutLink URL, and removes URL duplication. Each crawler operates independently. To do this, the list of downloaded URLs managed by each crawler must be mutually exclusive. Otherwise, different crawlers will download the same document. As a solution to this, each crawler can manage the URL domains to be downloaded by dividing them exclusively from each other. In other words, it is a method of managing only the ones belonging to the download domain and passing the remaining URLs to other crawlers. If this method is used, each crawler can operate independently.

Next, web content must be extracted, and web content extraction technology provides a function of automatically extracting content to be used for information analysis from web documents. The web content extraction system is a device that automatically generates rules for extracting content and extracts only content.A Rule Generator that automatically generates content extraction rules, and a Navigation Content Eliminator that removes navigation content from a given web document. , Content extraction rule may be composed of a content extractor (Core Context Extractor) that extracts the content through the keyword similarity comparison. Of course, it is also possible to collect real-time data by various methods other than the above-described crawling method, and is not limited to those listed and is not excluded for reasons not listed.

The storage unit 311 may extract and store a list of preparations included in the weekly study guide for each school and grade. The weekly study guide is a guide that includes what subjects to learn from Monday to Friday next week, at what time and what course, and what preparations and precautions are required for this, etc., which are required for each grade level on the homepage of each elementary school. It includes dates and a list of items to prepare. Accordingly, the storage unit 311, for example, in the weekly study guide for the third grade of A elementary school, on Monday, November 23, the preparations are math-compass, on Tuesday, November 24, math-compass, and Wednesday, November 25 For physical education-wearing simple clothes, English-English file, English notebook, Mathematics-Compass, science-ruler (15cm or more) on Thursday, November 26th, black name pen, on Friday, November 27th, if extracted as Mathematics-Compass, each School, grade, date, day of the week, and a list of items to be prepared may be extracted, and the storage unit 311 may store them.

When the student terminal 100 inputs a school and a grade, the output unit 313 extracts a list of preparations corresponding to the school and grade, and at least one kind of phrase ( Stationery), the item icon can be displayed in the phrase corresponding to the list of items to be prepared. The student terminal 100 registers the school, grade, name and address, outputs a list of items to be prepared included in the weekly study guide, and accesses the 360 degree VR (Virtual Reality) showroom provided for each grade, and then uses a character. You can purchase and pay for the stationery included in the list of items to be prepared. At least one affiliated store terminal 500 uploads at least one stationery data to be displayed in the 360-degree VR showroom, and when purchasing and paying at the student terminal 100, an order via the stationery shopping service providing server 300 You can receive the details and upload the waybill.

Additionally, in an embodiment of the present invention, interactive VR content may be provided. First of all, interaction data is created at the same time when a VR video is produced. When a VR image is first produced as an image through 3D rendering, only 3D spatial information, object location information, and real-time interaction event information are extracted from the implemented 3D data and converted into data. When a VR video is played back on a user player, this interaction data is played in real time by synchronizing the VR video and information necessary for the interaction, except for 3D rendering. Second, it includes 3D environment information (object location, user location) that varies with the passage of time in the VR image. This information should be the same as the time the VR video is playing. Third, the interaction event information is synchronized with the VR video playback time in the user player and processed in real time.

The method of dividing and utilizing VR image data and interaction data (three-dimensional spatial information, object information, and interaction script) can secure various advantages. In particular, in a lower platform where it is difficult to apply interaction, it is a method of playing only VR images, which is compatible with the existing method. In addition, by leaving the VR image as it is, it is possible to create a number of different interaction data so that it is possible to easily create a modified content, and only the interaction data can be modified and supplemented to be updated and reflected in the service in real time. In addition, 3D real-time rendering is avoided, but it can be produced and utilized with high-spec quality in advance through VR images, so it can be free from platform restrictions of various performances.

The core of interactive VR video content is player development. The player downloads and plays the VR video content desired by the user from the server, and internally performs 3D physics calculation for event processing in real time. This is synchronized with the video being played, and allows objects or events played on the video to actually interact. Content is developed in two forms in one project. The first is a project for producing VR video, and the second is a project for data extraction for interaction played in real time on the player. Through this method, it is possible to implement the synchronization of the interaction data and the VR video.

Construct a planned three-dimensional space and place interactive objects. It implements what happens over time and automatically proceeds without interaction from the beginning to the end of the content. Since the result is produced as a video, it can be free from the restrictions on the platform performance of the user. In particular, in the case of rendering and showing real-time 3D content on mobile, the hardware performance of the terminal is not sufficient, and thus, quality deterioration problems, including resolution and frame rate, are indispensable. The deterioration of the quality of content acts as a major disadvantage in a virtual reality environment where realistic expression and formation of immersion are important. In contrast, when the VR image approached by the present invention and the image of the game engine are synthesized and produced, high-quality, high-resolution 3D images that are difficult to reproduce on a mobile are produced relatively easily.

In the case of constructing data corresponding to the interaction, 3D spatial information, information on a location and collision range of an object, information on a movement path of a camera moving in a virtual space, and the like may be included. If 3D model data is imaged and worked, it may be relatively easy to obtain 3D information for interaction. In order to secure 3D information from the actual image in the future, a separate step of converting to a 3D space may be added and 3D information may be secured. The data used for video production is converted into data using Unity's Asset Bundle technique. The player can load data at runtime and play it in synchronization with the video. In addition to 3D Unity, you can also use various programs.

The character unit 320 converts at least one type of character into a database so that the student terminal 100 can shop using a character, and selects at least one element constituting a character in the student terminal 100 to select a character. To create it. For example, it may be a method in which a 3D character is created in advance and the student selects components such as hair style, clothes, shoes, bag, body shape, eyes, nose, mouth, and height. In this case, the character may automatically change or evolve according to social media to be described later, that is, daily data shared by the student terminal 100, for example, photos, texts, emotions, and the like.

A method of recognizing the shape of the 3D character model by the character unit 320 is as follows. In order to perform model transformation linked with vocabulary information, it is necessary to find partial models having meaning through geometric feature information in the polygon of a given model. To this end, the boundary area is obtained by using the k-clustering algorithm for the curvature value information of the model. The boundary region is expanded in such a way that the minimum volume for each of the bounding boxes can be increased in consideration of the connection relationship of the vertices along the obtained boundary region. As described above, the model is mapped with the vocabulary table by using the SVM (Support Vector Machine) learned through the example models divided by hand for the initially divided partial models. For the experiment, you can perform an experiment on the character model, and after measuring the accuracy in performing the correct mapping in the partial model division, you can use it in the order of higher accuracy.

Each partial model classified through this process is used to find out which part of the body is associated with the vocabulary table. For the transformation of the 3D character model, the analyzed and obtained partial models are linked to the vocabulary table so that if there is a related vocabulary in the natural language processing (NLP) result of the sentence used in the student terminal 100, the model can be manipulated. do. For example, when the sentence "It was today's birthday, I had a birthday party with my friends and I was in a good mood" is entered, the model transforms the polygons corresponding to the mouth and eyes to create a smiling mouth and eyes. May be. From the hierarchical structure and geometric feature information between the partial models obtained during character model analysis, the most optimal position in the partial model can be selected and manipulated.

When the at least one affiliated store terminal 500 is a terminal of an affiliated store with an offline store, the information unit 330 maps and stores the location, name, phone number, operating time, and inventory data of the offline store with stationery data, If the period between the required date of preparations included in the preparations list based on the time the student terminal 100 is accessed is less than a preset period, a student terminal among at least one affiliated store terminal 500 having inventory data corresponding to the preparations The offline store may be guided to the student terminal 100 in the order of the address of (100). For example, I have to go out tomorrow at 8 am on Monday morning, but I know I need to buy a "inner shoe bag" at 9 pm on Sunday, I don't know where to sell my slippers right now, and I don't know which one is open.

In this case, even if you try to use courier delivery or early morning delivery, it is already too late because there is a deadline for delivery on the same day. In this case, you have to go to an offline store, but you have to call one by one and ask if the door is currently open or if the door is open, and if you are selling a slipper bag. Therefore, when entering inventory data at an offline store and entering photos, prices, location, operating hours, etc., check whether the store currently has an indoor shoe pocket, if there is an indoor shoe pocket, whether it is currently in operation, and when to close the door. And it will be able to tell you which store is the closest and has an open shoe pocket.

When the O2O payment unit 340 selects any one offline store from the student terminal 100, selects inventory data corresponding to the preparation, and then performs online to offline (O2O) payment, the inventory data is as much as the amount paid. It can reduce and transmit a notification message to the affiliated store terminal 500 of the selected offline store. If the above-described example continues to be cited, if the student terminal 100 makes an O2O payment and sets the pickup time, "indoor bag" and "expected arrival time 9:20" are displayed in the corresponding offline store. In this case, the store owner who is trying to close because there are no customers, realizes that there is a customer (student) who has calculated the indoor shoe pocket and waits until 9:20.

At this time, the student terminal 100 is at least one student terminal 100 owned by at least one student, and the social media unit 350 includes a feed uploaded from at least one student terminal 100 is a human network It can be shared through at least one student terminal 100 through. Recently, there are many cases where I do not know the names of my classmates in a non-face-to-face situation, but it can create an opportunity to socialize with friends while sharing my daily life, and it may change as the character processes the text posted on the feed in natural language. You can also create a fun element.

The delivery management unit 360 extracts the average delivery date based on the address of the student terminal 100 in at least one kind of phrase arranged in the 360-degree VR showroom and then outputs and displays the average delivery date together, and the preparations must be prepared. If the period between the delivery date and the delivery date is shorter than the average delivery date, excluding business days, a non-delivery indication within the period can be displayed. For example, in the case of metropolitan areas such as Seoul or Gyeonggi, same-day delivery, that is, the seller starts delivery immediately after placing an order, moves to the distribution center in the evening or early morning of the day, and then goes to the agency at the home address where the student lives on the following day. They are moved and delivered according to the delivery order. In other words, even if it is delivered on the same day, it only means that the shipment is made on the same day as the order received, but it does not mean that the delivery will be made as soon as the order is received. Therefore, the delivery date of the courier company used by the seller for each region is averaged, or the average delivery date data is collected as big data from the portal site, and then, based on the collected data, it is possible to predict when to receive an order now.

At this time, the school terminal 400 is at least one school terminal 400, which is at least one school terminal, and the prediction unit 370 is a list of items to be prepared from weekly study guides for each grade collected by at least one school terminal 400 Is extracted and accumulated for each school and grade and stored as a history log, and a list of necessary preparations for each school, grade, semester, and weekly is transmitted to at least one affiliated store terminal 500, and at least one affiliated store terminal It is possible to proceed with the process so that the phrase corresponding to the list of necessary items is purchased from 500 and placed in each distribution warehouse as much as the predicted demand for each region. If you make this prediction, you can save the time traveling from the seller to the distribution center, so you can get true same-day delivery, that is, as soon as you place your order.

Among the predicted delivery systems, the order management system, delivery model, and comprehensive database are composed of a great number of modules, but the demand prediction model of the present invention predicts which items each student will purchase by using the corresponding prediction technique using the weekly study guide It is a model to do. For example, User-based Collaborative Filtering, Item-based Collaborative Filtering, Random Method, Popularity-based Method, Basic Component Analysis ( Principal Component Analysis), Singular Value Decomposition, and other prediction techniques are used to find the most efficient and effective prediction technique for the prediction accuracy of each model, and then set the parameters of the model made by the prediction technique.

At this time, the accuracy can be measured by constructing a predictive model using the "Recommenderlab" additional package of the R language. The demand forecasting model can build a demand forecasting model and measure prediction accuracy using the six forecasting techniques described above. If user-based collaborative filtering is used, the flow of matrix construction, similarity calculation, similar user selection, prediction value calculation, prediction result generation, and the like can proceed. First, the user's purchase history information in binary numbers is collected and formed into a matrix. Then, according to the formula of the cosine similarity calculation method, the similarity between other users and the predicted user is calculated, and the predicted user and the predicted user are based on the number of neighbors. After selecting a list of users with high similarity, predicted values are calculated for all items in the similar user group, and the top-N items with high predicted values are generated as prediction results. The result that comes out is a predicted value of what item the predicted user will purchase in the future.

In addition to the above-described user-based collaborative filtering, an item-based algorithm can also be applied. The item-based algorithm is a proposed algorithm to compensate for the disadvantages of the user-based algorithm. This is the recommended way. This is because the similarity of items is relatively stable than that of users, so that the real-time performance of item-based recommendation may be superior to that of user-based recommendation.

The item-based algorithm generates a predicted value through a total of 3 steps. In the first step, a user-item matrix is created with user, item, and evaluation value data. In the second step, the similarity between items is calculated using the evaluation value and a neighboring neighbor is selected. Methods such as Cosine Similarity, Pearson' Correlation, and Adjusted Cosine Similarity can be used to calculate the similarity. Equation 1 below is a Pearson's correlation equation, where ru,i denotes user u's evaluation of item i, and (bar)ri denotes an average evaluation score of the i-th item.

In the third step, the evaluation predicted value of the target user is calculated by using the evaluation values of neighboring neighbors. Equation 2 below is an equation for obtaining a predicted value for the item i of the user u, where Si is a set of similar items of the item i.

Next, text mining will be described. As the use of mobile devices becomes more common, the amount of data generated online is increasing exponentially, and most data including text is unstructured data. Text mining is a field of research that seeks to solve information overload problems using data mining, machine learning, natural language processing, information retrieval, and knowledge management techniques. This includes pre-processing of document collection, storage of intermediate expressions, and analysis of intermediate expressions, and results can be visualized. Text mining is a process of extracting patterns or knowledge of interest or value from unstructured text documents and is used for various purposes.

Text mining applies various analysis techniques according to the purpose of using text data. Review data, which is text data that can be accessed on online purchase sites, is another rating left by customers who purchase. The information hidden in product reviews is very useful to clearly understand what users like and dislike. Among the analysis techniques of text mining, Sentiment Analysis is a process of extracting emotions or opinions from texts on specific topics such as reviews. Also known as Opinion Mining, the emotional index is calculated by analyzing people's opinions, emotions, emotions, attitudes, etc. from the text in the document. Emotional indices composed of positive and negative indices can be used to determine the positive and negative emotions included in the text.

When both the above-described collaborative filtering and text mining are used, a curating service can be provided to users by applying item-based collaborative filtering after emotional analysis of product reviews. That is, the sentiment score calculated by text mining and analyzing the user's review data for an item (product) can be used as a weight when calculating the predicted value of item-based collaborative filtering. The collected data can be divided into text data (ItemId, Reviews) and numerical data (ItemId, UserId, Rating) and processed in a total of 3 steps.

In the pre-processing of review data, unnecessary parts are removed so that each review data left by a user for each item can be used for analysis, and vocabulary and syntax analysis are performed as follows. The first is the process of removing and processing unnecessary parts, removing HTML tags remaining in the saved review text, and processing numbers and symbols as blanks. The second is the tokenization process, which proceeds to tokenization of sentences and words. Token is a unit for document analysis, and sentence tokenization classifies sentences in a document according to paragraph delimiters and regular expressions. Word tokenization separates words according to regular expressions and symbols such as spaces and commas (,). The third is the process of removing Stop Words, which removes words that often appear in documents but do not have much meaning to use to distinguish characteristics. The fourth is the POS Tagging process in which stop words are removed and the root is extracted from the remaining word tokens, and the appropriate part of speech is designated.

The second step is the emotional analysis and score calculation step. The VADER sentiment dictionary can be used to calculate the sentiment score for each review based on the words tagged with the POS after the pre-processing step. VADER is an emotional dictionary built with collective intelligence, and the results are expressed in negative, positive, neutral, and compound indexes. Compound index returns a score between'very negative (-1)' and'very positive (+1)' by summing the balance scores of the positive, neutral, and negative indices of each word in the vocabulary dictionary and normalizing it. Is used as the sentiment score of the sentence. In an embodiment of the present invention, after obtaining a compound score for each review of an item using the NLTK package, the average value of the values may be designated as the emotional score of the corresponding item.

After calculating the sentiment score for each item, the sentiment weight (ws) is calculated. The emotion weight uses the absolute value and the threshold value of the emotion score, and Equation 3 below is an equation for calculating the emotion weight. cs stands for Compound Score, and abs(cs) stands for the absolute value of cs.

The third step is a step of calculating and recommending item prediction scores. An item-based collaborative filtering algorithm is used to recommend items using the collected data. UserId, ItemId, and Rating of the collected data are used to create a User-Item Matrix. The similarity between items is calculated using the generated matrix using the adjusted cosine similarity, and is as shown in Equation 1 above. At this time, ru,i, ru,j represent the evaluation values of user u's items i and j, respectively, and (bar)ru is the average of user u's evaluation values.

After calculating the similarity between items, the top N neighbors with high similarity are selected, and a predicted value is calculated based on the evaluation values of the neighbors. In calculating the predicted value, the weight of the sentiment score of the review for the item is used. Equation 5 below is an equation for calculating a predicted value, where Pui is a predicted value for item i of user u, and S(u) is an upper N neighbor set of target user u. ??(bar)r'i is an average of the weights for item i, Equation 4 is an equation for obtaining (bar)r'i, and ws represents the emotional weight.

After calculating the predicted value, the top N items with the highest predicted value may be finally recommended to the target user, or the one with the highest predicted value may be automatically selected and reserved. At this time, since the concept of time and date is included in the word “weekly study plan” itself, when extracting N items, it is possible to limit the process to affiliate stores that have inventory data that fits the student's schedule.

When the student terminal 100 stores at least one phrase in the wish list, the gift giving unit 380 searches the wish list from at least one other student terminal 100 connected through a human network and corresponds to the gift. Instead, you can make payments possible.

At this time, the student terminal 100 is at least one student terminal 100 held by at least one student, and the second-hand market unit 390 is, when uploading used goods from any one student terminal 100, at least one It is possible to create a channel for inquiry and purchase contact in the student terminal 100 of.

Hereinafter, an operation process according to the configuration of the stationery shopping service providing server of FIG. 2 will be described in detail with reference to FIGS. 3 and 4 as examples. However, it will be apparent that the embodiment is only any one of various embodiments of the present invention, and is not limited thereto.

3, when (a) stationery shopping service providing server 300 collects a weekly study guide from at least one school terminal 400 and collects a list of items to be prepared from the weekly study guide, by region, school, and grade It can be classified as and collected. And, (b) when the student terminal 100 registers as a member, creates a character, and enters information such as school and grade, the stationery shopping service providing server 300 You will be able to know what preparations to bring. At this time, (c) the stationery shopping service providing server 300 is a 360-degree virtual reality showroom that includes stationery (including preparations) of first and second graders when the student of the student terminal 100 is a second grade elementary student, that is, The content is transmitted so that offline stores such as stationery can appear as they are. (d) The student terminal 100 can enter the 1st & 2nd grade room by using its own character, and can contain the desired phrase while passing through the display stand in which each phrase is displayed as shown in (a) of FIG. 4.

At this time, since not only the phrases corresponding to the preparations are listed, but various phrases are actually displayed and mixed like an offline store, a user who is an elementary school student may not know what preparations he/she needs. Accordingly, when passing through the 360 degree VR showroom in the student terminal 100, the stationery shopping service providing server 300 shows the necessary preparations in the student terminal 100, and the delivery date and the remaining period according to the average delivery period of the corresponding stationery , That is, the time from now until the next week's supplies are needed, for example, if today is Monday and B supplies are needed this Friday, then you have 3 days left. You need it on Friday morning, so you have to arrive by Thursday. Accordingly, the delivery date is 2 days, and the day to prepare the preparations is the third day, so if you purchase the B preparations now, you can take the B preparations to school on Friday.

This delivery period is necessary, and the day when you have to bring your supplies is in the morning, so you have to arrive by the day before, and it is not easy for an elementary school student to think about it one by one. Accordingly, it is possible to make it easier to select by marking only items that can arrive on time in consideration of the date when the preparations are to be prepared and the delivery date.

On the other hand, (b) stationery shopping service providing server 300 can receive real-time inventory data from at least one affiliated store terminal 500, and check the operating hours so that students who prepare preparations in a hurry do not make a fuss. I can. The reason for checking in real time with inventory data is that if there is no stock, you can visit and see frustration. In addition, (c) stationery shopping service providing server 300, it is possible to create a community such as social media and second hand marketplaces, while sharing feeds, communication channels to prevent depression in a society where non-face-to-face and un-tact become new normals. May be provided, and (d) through predictive delivery, true same-day delivery may be possible.

In addition, even if the affiliated store terminal 500 is an online store, using AR and GPS such as Pokemon Go, an augmented reality store can be created so that students with student terminals 100 can move, or AR preparations or AR stationery are preset. It can also provide a fun factor so that you can purchase the corresponding AR preparation only by placing it on the GPS and going to that location. Due to the recent coronavirus outbreak, students who are always in the house may have many people even if they go to the playground, and the time at home is increasing, worrying that it will overlap with the path of the confirmed person. Accordingly, in real time, each item (stationery) is placed based on GPS in a location with a small floating population, and students can purchase the stationery only if they have to go to that location. In this way, you can buy supplies among stationery without actually going into the offline store, and you can choose what you want and go outside, so you can not stay inside the house. Each location can be changed in real time, and if each member, that is, the student terminal 100 is driven, the location can be relocated.

The matters that are not described about the method of providing the online stationery shopping service linked with the elementary school weekly study guide of FIGS. 2 and 3 are described above with respect to the method of providing the online stationery shopping service linked with the elementary school weekly study guide through FIG. 1. Since the content is the same as the content or can be easily inferred from the described content, the following description will be omitted.

5 is a diagram illustrating a process of transmitting and receiving data between components included in the online stationery shopping service providing system linked with the elementary school weekly study guide of FIG. 1 according to an embodiment of the present invention. Hereinafter, an example of a process in which data is transmitted/received between each component will be described with reference to FIG. 5, but the present application is not limitedly interpreted as such an embodiment, and is illustrated in FIG. 5 according to various embodiments described above. It is obvious to those skilled in the art that the process of transmitting and receiving data may be changed.

Referring to FIG. 5, the stationery shopping service providing server classifies and collects weekly study guides registered by at least one school terminal by school and grade (S5100).

In addition, the stationery shopping service providing server extracts and stores the list of preparations included in the weekly study guide for each school and grade (S5200), and when entering a school and a grade in a student terminal, a list of preparations corresponding to the school and grade is provided. It extracts and outputs a preparation icon to a phrase corresponding to the preparation list among at least one type of phrase arranged in the 360-degree VR showroom provided for each grade (S5300).

The order between the above-described steps S5100 to S5300 is only an example and is not limited thereto. That is, the order of the above-described steps S5100 to S5300 may be mutually changed, and some of the steps may be executed or deleted at the same time.

The matters that are not described about the method of providing the online stationery shopping service linked with the elementary school weekly study guide of FIG. 5 are described above with respect to the method of providing the online stationery shopping service linked with the elementary school weekly study guide through FIGS. 1 to 4 above. Since the content is the same as the content or can be easily inferred from the described content, the following description will be omitted.

The method for providing an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment described with reference to FIG. 5 is in the form of a recording medium including a computer-executable instruction such as an application executed by a computer or a program module. It can also be implemented as Computer-readable media can be any available media that can be accessed by a computer, and includes both volatile and nonvolatile media, removable and non-removable media. Further, the computer-readable medium may include all computer storage media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data.

The method for providing an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention described above may include an application basically installed in a terminal (this may include a program included in a platform or an operating system basically installed in the terminal). Yes), and may be executed by an application (that is, a program) directly installed on the master terminal by a user through an application providing server such as an application store server, an application, or a web server related to the service. In this sense, the method for providing an online stationery shopping service linked with an elementary school weekly study guide according to an embodiment of the present invention described above is implemented as an application (i.e., a program) installed in the terminal or directly installed by the user, and It can be recorded on a computer-readable recording medium, such as.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

Claims (10)

At least one school terminal for uploading weekly study guides for each grade;
It registers the school, grade, name and address, prints out the list of supplies included in the weekly study guide, accesses the 360 degree VR (Virtual Reality) showroom provided for each grade, and uses a character to be included in the list of supplies. A student terminal for purchasing and paying stationery; And
A collection unit for classifying and collecting weekly study guides registered in the at least one school terminal by school and grade, a storage unit for extracting and storing a list of preparations included in the weekly study guide by school and grade, and school at the student terminal And when entering a grade, extract a list of items to be prepared corresponding to the school and grade, and output an icon of items to be prepared in a phrase corresponding to the list of items to be prepared among at least one kind of phrases arranged in the 360 degree VR showroom provided for each grade. Includes; stationery shopping service providing server including an output unit to,
The stationery shopping service providing server,
It collects preparations for each weekly, and provides predicted delivery by predicting demand by region for the type and quantity of phrases included in the preparations,
The predicted delivery is,
After arranging the list of items ready to buy from the student terminal in the branch distribution center according to the time when the supplies are needed, and purchasing and paying the stationery at the student terminal, the delivery process between the branch distribution center and the destination agency and the student is performed. An online stationery shopping service providing system linked with an elementary school weekly study guide, characterized in that the stationery paid by the student terminal is delivered through.
The method of claim 1,
The stationery shopping service providing server,
A character unit for converting at least one type of character into a database so that the student terminal can shop using the character, and generating the character by selecting at least one element constituting the character in the student terminal;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 1,
The online stationery shopping service providing system linked with the elementary school weekly study guide,
At least one affiliated store that uploads at least one stationery data to be displayed in the 360-degree VR showroom, receives order details through the stationery shopping service providing server, and uploads a waybill when purchasing and paying at the student terminal Terminal;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 3,
The stationery shopping service providing server,
When the at least one affiliated store terminal is a terminal of an affiliated store with an offline store, the location, business name, phone number, operating time, and inventory data of the offline store are mapped and stored with the stationery data, and the time when the student terminal is accessed If the period between the required date of preparations included in the preparations list is less than a preset period, offline stores are searched in the order closest to the address of the student terminal among at least one affiliated store terminal having inventory data corresponding to the preparations. A guide for guiding the student terminal;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 4,
The stationery shopping service providing server,
When performing O2O (Online to Offline) payment after selecting any one offline store from the student terminal and selecting inventory data corresponding to the preparation, the inventory data is reduced by the amount paid, and the selected affiliate store of the offline store An O2O payment unit for transmitting a notification message to the terminal;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 1,
The student terminal is at least one student terminal possessed by at least one student,
The stationery shopping service providing server,
A social media unit configured to share a feed uploaded from the at least one student terminal to at least one student terminal through a personal network;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 1,
The stationery shopping service providing server,
In at least one type of phrase arranged in the 360-degree VR showroom, the average delivery date is extracted based on the address of the student terminal, and the average delivery date is output and displayed together, and the period between the date when the preparation is to be prepared is determined. A delivery management unit that outputs an indication of non-delivery within a period if it is shorter than the average delivery date excluding a business day;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 1,
The school terminal is at least one school terminal that is at least one school terminal,
The stationery shopping service providing server,
A list of items to be prepared is extracted from the weekly study guides for each grade collected in at least one school terminal, accumulated for each school and grade, and stored as a history log, and at least one list of items required for each school, grade, semester, and weekly A prediction unit that transmits to the affiliated store terminal of the at least one affiliated store, purchases a phrase corresponding to the required preparation list from the at least one affiliated store terminal, and carries out a process to place it in each distribution warehouse as much as the estimated demand for each region;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 1,
The stationery shopping service providing server,
When the student terminal stores at least one phrase in the wish list, at least one other student terminal connected through a personal network inquires the wish list to enable payment instead of corresponding to the gift;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.
The method of claim 1,
The student terminal is at least one student terminal possessed by at least one student,
The stationery shopping service providing server,
When uploading used goods from any one of the student terminals, a second-hand market unit that creates a channel for inquiry and purchase contact in at least one student terminal;
Online stationery shopping service providing system linked to the elementary school weekly study guide, characterized in that it further comprises.

Images