{"id":1348,"date":"2026-08-20T10:41:32","date_gmt":"2026-08-20T01:41:32","guid":{"rendered":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/?p=1348"},"modified":"2026-08-20T10:41:32","modified_gmt":"2026-08-20T01:41:32","slug":"please-cooperate-with-the-congestion-measurement-in-the-library","status":"publish","type":"post","link":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/please-cooperate-with-the-congestion-measurement-in-the-library\/","title":{"rendered":"Please cooperate with the congestion measurement in the library."},"content":{"rendered":"\n<p class=\"has-text-align-left wp-block-paragraph\">To make the library more comfortable to use, <strong>we are conducting a pilot test of a visualization service that provides real\u2011time and easy\u2011to\u2011understand congestion information.<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\">This project is developed and operated primarily <strong>by student fellows at TGIF (Town &amp; Gown Future Innovation Institute).<\/strong><\/p>\n\n\n\n<div style=\"height:64px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-primary-color has-alpha-channel-opacity has-primary-background-color has-background is-style-default\"\/>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading has-text-align-center has-primary-color has-text-color has-link-color wp-elements-1\" style=\"margin-top:var(--wp--preset--spacing--small);margin-right:0;margin-bottom:var(--wp--preset--spacing--small);margin-left:0;letter-spacing:0.5px\">How does it work?<\/h3>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-align-left has-primary-color has-text-color has-link-color wp-elements-2 wp-block-paragraph\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;letter-spacing:0.5px;line-height:2\">Small computers (ESP32 devices) installed inside the library receive<strong> the number of Bluetooth signals<\/strong> emitted by smartphones and other devices. The system estimates the level of congestion based on how many signals are detected.<\/p>\n\n\n\n<ul style=\"margin-right:0;margin-left:0;letter-spacing:1px\" class=\"wp-block-list\">\n<li style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0\">We do not collect any information that can identify individuals.<\/li>\n\n\n\n<li>MAC addresses are random strings and do not contain any personal information.<\/li>\n\n\n\n<li>If you turn off Bluetooth, your device will not be counted.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\" style=\"padding-top:var(--wp--preset--spacing--small);padding-right:0;padding-bottom:var(--wp--preset--spacing--small);padding-left:0;grid-template-columns:auto 41%\"><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\">The ESP32 device (small computer) on the right collects the data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <strong>When using BIBLA, please do not touch the device or unplug it from the outlet. <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The system only counts Bluetooth signals from smartphones and other devices, so no personal information can be identified. You can use the library with confidence.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" src=\"https:\/\/tgif.hiroshima-u.ac.jp\/ja\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-08-131534.png\" alt=\"\u8a2d\u7f6e\u3057\u3066\u3044\u308b\u5c0f\u578b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\" class=\"wp-image-2516 size-full\"\/><\/figure><\/div>\n\n\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" style=\"margin-top:var(--wp--preset--spacing--small);margin-bottom:var(--wp--preset--spacing--small)\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\" style=\"padding-top:var(--wp--preset--spacing--x-small);padding-bottom:var(--wp--preset--spacing--x-small)\">Looking Ahead<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Visualizing congestion levels is a new initiative designed to make the library easier and more comfortable to use. <br>Moving forward, TGIF Student Fellows will continue leading research and development efforts to improve the learning environment across campus.<\/p>\n\n\n\n<details class=\"wp-block-details has-white-background-color has-background is-layout-flow wp-container-core-details-is-layout-ff3e5120 wp-block-details-is-layout-flow\" style=\"font-style:normal;font-weight:500\"><summary><strong>Expansion to BIBLA West \/ East<\/strong><\/summary>\n<p class=\"wp-block-paragraph\">Although the system is currently being tested in the Central Library, we plan to introduce the same mechanism in BIBLA West and BIBLA East in the future. Our goal is to create an environment where congestion levels can be checked across the entire campus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By reducing the time students spend wondering \u201cWhich space is open right now?\u201d between classes, we hope to make it easier and smoother for everyone to find suitable study spaces.<\/p>\n<\/details>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<details class=\"wp-block-details has-white-background-color has-background is-layout-flow wp-container-core-details-is-layout-ff3e5120 wp-block-details-is-layout-flow\" style=\"font-style:normal;font-weight:500\"><summary><strong>Displaying Congestion Levels in the TGO App<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>We plan to make real\u2011time congestion information available in the TGO app in the future.<\/strong> <strong>(Currently, only the cafeteria congestion service is provided.)<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-left has-tertiary-color has-text-color has-link-color has-x-small-font-size wp-elements-3 wp-block-paragraph\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\u203b<strong>For more details about the Cafeteria Congestion Visualization Service, please click here.<\/strong><em>\uff1a<\/em><a href=\"https:\/\/tgif.hiroshima-u.ac.jp\/en\/released-of-congestion-visualization-service-through-tgo-app\/\"> <\/a><a href=\"https:\/\/tgif.hiroshima-u.ac.jp\/en\/released-of-congestion-visualization-service-through-tgo-app\/\">about the Cafeteria Congestion Visualization Service<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Library Congestion Level<\/strong><\/li>\n\n\n\n<li><strong>Estimated Available Seats<\/strong><\/li>\n\n\n\n<li><strong>Opening Hours &amp; Floor Information<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Being able to check this information quickly through the app will reduce the stress of \u201cI went there, and it was full\u2026\u201d and help students use the learning environment more comfortably.<\/p>\n<\/details>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-container-core-details-is-layout-ff3e5120 wp-block-details-is-layout-flow\" style=\"font-style:normal;font-weight:500\"><summary><strong>Improving Accuracy with Position Estimation Using Bluetooth Signal Strength<\/strong><\/summary>\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:44% auto\"><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" fetchpriority=\"low\" src=\"https:\/\/tgif.hiroshima-u.ac.jp\/ja\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-08-144717.png\" alt=\"\" class=\"wp-image-2551 size-full\"\/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\">In the current system, devices located outside the library may still be detected if they are within Bluetooth range. To address this, we are working on a technique that estimates a device\u2019s approximate position by combining the Bluetooth signal strengths received by multiple ESP32 units (as shown in the left figure).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To further reduce signal variability, we apply machine learning to correct noise and improve the accuracy of the estimated location. This enables more precise identification of devices that are actually inside the library.<\/p>\n<\/div><\/div>\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-primary-color has-alpha-channel-opacity has-primary-background-color has-background\" style=\"margin-top:var(--wp--preset--spacing--x-large);margin-bottom:var(--wp--preset--spacing--x-large)\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Would you like to read this article as well?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2460\u3000You can view reports written by actual users in the \u201cStudent Reports\u201d section on the TGO website.\uff1a<a href=\"https:\/\/tgo.hiroshima-u.ac.jp\/congestion-visualization-service-report\/\">https:\/\/tgo.hiroshima-u.ac.jp\/congestion-visualization-service-report\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2461\u3000You can read comments from the students involved in the development in the \u201cStudent Interviews\u201d section on the TGO website.\uff1a\u3000<a href=\"https:\/\/tgo.hiroshima-u.ac.jp\/congestion-visualization-service-interview\/\">https:\/\/tgo.hiroshima-u.ac.jp\/congestion-visualization-service-interview\/<\/a><br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>To make the library more comfortable to use, we are conducting a pilot test of a visualization service that provides real\u2011time and easy\u2011to\u2011understand congestion information. This project is developed and operated primarily by student fellows at TGIF (Town &amp; Gown Future Innovation Institute). How does it work? Small computers (ESP32 devices) installed inside the library &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/tgif.hiroshima-u.ac.jp\/en\/please-cooperate-with-the-congestion-measurement-in-the-library\/\" class=\"more-link\">Read more<span class=\"screen-reader-text\"> &#8220;Please cooperate with the congestion measurement in the library.&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":1423,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10,21],"tags":[],"class_list":["post-1348","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ebpm-dx-div","category-external-event","category-student-fellow"],"featured_media_urls":{"thumbnail":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-150x150.jpeg",150,150,true],"medium":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-300x170.jpeg",300,170,true],"medium_large":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",768,435,false],"large":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-1024x581.jpeg",950,539,true],"1536x1536":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",1180,669,false],"2048x2048":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",1180,669,false],"inspiro-featured-image":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",1180,669,false],"inspiro-loop":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-950x320.jpeg",950,320,true],"inspiro-loop@2x":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-1180x640.jpeg",1180,640,true],"portfolio_item-thumbnail":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-600x400.jpeg",600,400,true],"portfolio_item-thumbnail@2x":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",1180,669,false],"portfolio_item-masonry":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-600x340.jpeg",600,340,true],"portfolio_item-masonry@2x":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",1180,669,false],"portfolio_item-thumbnail_cinema":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-800x335.jpeg",800,335,true],"portfolio_item-thumbnail_portrait":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-600x669.jpeg",600,669,true],"portfolio_item-thumbnail_portrait@2x":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1.jpeg",1180,669,false],"portfolio_item-thumbnail_square":["https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-content\/uploads\/2026\/06\/\u6df7\u96d1\u72b6\u6cc1\u53ef\u8996\u5316\u30b5\u30fc\u30d3\u30b9\uff3f\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1-800x669.jpeg",800,669,true]},"_links":{"self":[{"href":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-json\/wp\/v2\/posts\/1348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=1348"}],"version-history":[{"count":5,"href":"https:\/\/tgif.hiroshima-u.ac.jp\/en\/wp-json\/wp\/v2\/posts\/1348\/revisions"}],"predecessor-version":[{"id"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