A personal tourism navigation system to support traveling multiple destinations with time restrictions

AINA2004 : The 18th International Conference on Advanced Information Networking and Applications , Mar 29 -31, 2004 , Fukuoka, JapanWe propose a personal navigation system (called PNS) which navigates a tourist through multiple destinations efficiently. In our PNS, a tourist can specify multiple destinations with desired arrival/stay time and preference degree. The system calculates the route including part of the destinations satisfying tourist's requirements and navigates him/her. For the above route search problem, we have developed an efficient route search algorithm using a genetic algorithm. We have designed and implemented the PNS as a client-server system so that the portable device users can use the PNS through the Internet. Experiments using general map data and PDAs show that our PNS can calculate a semioptimal route almost in real-time

Mental and physical effects of the 2011 Great East Japan Earthquake on School Children, and Health Support initiatives by YogoTeachers: Findings from a survey of high school yogo teachers 5 years after the disaster

Objective: To clarify the current mental and physical state of students 5 years after experiencing the Great East Japan earthquake, tsunami, and nuclear accident, and to shed light on the practical initiatives and issues faced by yogo teachers in supporting students’ health. Method: In May 2016, we conducted a mail-based questionnaire of yogo teachers at 15 prefectural high schools in Soma District and Futaba District (collectively, “Soso”) in Fukushima Prefecture, one of the areas most heavily affected by the Fukushima Daiichi Nuclear Power Plant accident.　The questionnaire focused on (1) health and school life of students; and (2) current initiatives and issues faced by yogo teachers in supporting student health. Results: We received responses from 8 of the 15 high school yogo teachers surveyed (response rate: 53.3％).Six yogo teachers (75％) responded that the “students are calm.” However, 6 yogo teachers (75％) recognized a tendency among students towards weight gain and obesity, as well as reduced physical stamina and sporting ability, while 4 yogo teachers (50％) indicated that some students were anxious about their future and career path, and were receiving personal support from the school counselor.　The yogo teachers provided support to students while attempting to ascertain their mental and physical well-being through greater health monitoring and questionnaires, and while coordinating with the school physician and counselor. Conclusion: Five years after the earthquake, high school students in the Soso district are now leading a more relaxed school life, but still feel anxious about their future health and career path due to lingering concerns about radiation, highlighting the need for long-term support by yogo teachers

Health Support Provided by Yogo Teachers for Adolescent Female Students with a Thin Body Type

Purpose: To clarify the realities and challenges involved in health support provided by yogo teachers to adolescent girls who have a thin body type. Methods: A semi-structured interview survey was conducted with yogo teachers at a Japanese high school with experience of providing health support to thin adolescent female students and the results of the survey were subjected to qualitative analysis. Results: With regard to health support provided by yogo teachers, the results of analysis found that the actual situation consisted of the five categories of 【sharing information throughout the school organization to investigate methods of support】,【 realizing studentsʼ situations through the provision of individual support】, 【referring students and parents to specialist agencies】,【investigating collaborations with parents with students ʼ consent】, and 【carrying out prevention and awareness-raising activities about thin physiques】.　 However, the analysis also found that the practical challenges for providing such health support consisted of the six categories of 【working with parents to liaise with medical institutions】,【continuous support in collaboration with specialist agencies】,【 educational health support that enables all students to manage their own health】,【 yogo teachersʼ professional knowledge and assessment of eating disorders】,【 support methods that students can engage with on their own initiative, according to their situation】, and 【creating a counseling- friendly environment to facilitate early detection】.Discussion: While yogo teachers had an overall grasp of studentsʼ situations through their organizational engagements in cooperation with faculty and school physicians, as well as individual support activities, it was clear that they faced difficulties and challenges in relation to working together with parents and specialist agencies.　In the future, improving collaboration with parents will require that they, too, be encouraged to recognize that being excessively thin represents a health problem for adolescent female students.　In addition, it will also be necessary to work towards building daily collaboration systems, such as by having yogo teachers keep track of potential partner medical institutions as a matter of routine.　It was further suggested that yogo teachers will need to provide educational and preventive health support oriented toward helping female students acquire the ability to manage their own health

スクリーン／フィルム乳房撮影法における乳房線量測定システム

The average glandular dose to glandular tissue m mammography is generally assumed to be a function of beam quality (HVL), x-ray tube target material, tube voltage, breast thickness, breast composition and, to a lesser extent, x-ray tube voltage waveform. The average glandular dose is generally determined from published tables with knowledge of the above function. Tables for a high frequency x-ray generator are not yet published. In our study, the lookup tables for the average glandular dose were made at 28 kV (high frequency x-ray generator), employing a breast simulating tissue (0-100% adipose tissue, 0-100% glandular tissue) phantom for an Mo target - Mo filter source assembly. We tried to estimate breast composition from x-ray mammograms by digital image processing techniques, also using the simulating tissue phantom. Then the system that automatically calculates the average glandular dose from digitized clinical x-ray mammograms was built. It is considered that this system can contribute to objective evaluation of the average glandular dose.乳房X線撮影法において乳腺組織に対する平均放射線吸収線量，すなわち平均乳腺線量は放射線のリスクの最も有用な測定法であり，現在，乳房に対する線量の評価に用いられている指標である。一般に，平均乳腺線量は線質（HVL），X線管球ターゲット材料，管電圧，圧迫乳房厚さ，乳房構成および（ある程度）X線管電圧波形の関数であるとされている。平均乳腺線量は，上記の関数についての情報を備えた表が公表されており，一般にその表を使って決定されている。近年，インバータ式といわれる高周波X線発生装置が普及してきた。しかし，その装置用の表は，まだ公表されていない。我々の研究では，乳房組織をシュミレートするファントム（0～100％乳腺組織，0～100％脂肪組織）を使用して，28kVでMoターゲット―Moフィルタソースアセンブリーを備えた高周波X線発生装置のために，平均乳腺線量用のルックアップテーブルを作成した。同様に，乳房組織をシュミレートするファントムを使用して，乳房X線写真から，ディジタル・イメージプロセシング技術によって，乳房構成の評価を試みた。そして，ディジタイズされた臨床乳房X線写真から，平均乳腺線量を自動的に計算するシステムを構築した。サンプル数が少ないため断定はできないが，日本女性は，基準構成（50％の脂肪および50％の乳腺組織）と比較すると，脂肪が少ない傾向を分析結果は示唆していた。また，平均乳腺吸収線量の限度は，明確に規定されていないが，American College of Radiology（ACR）は4 mGyなどを推奨している。また日本では，3 mGyが推奨されているが，我々の撮影システムはこれらを十分満足していた。このように本システムは，平均乳腺線量の客観的な評価に寄与するとともに，DR（digital radiography）などに応用すると，すなわちルックアップテーブルをDRのコンピュータに保存しておけば，撮影後すぐに乳房構成および平均乳腺線量を算出できる可能性をもつ

Extended-cycle processによる乳房撮影用増感紙／フィルムシステムの画質改善

Extended-cycle process is the term used for a processor in which the processing time has been prolonged usually to approximate 210 seconds. It has been known that the extended-cycle process of some single-emulsion films as used for mammography may enhance film contrast and increase film speed. So the speed was increased in lower speed and higher resolution system than conventional systems by means of using the extended-cycle process in this paper. We investigated how much the resolution of the system was kept. A single screen-single emulsion combination, Konica M-100/CM-H was employed as a low speed and high resolution system. This film after exposure was processed in the different combinations of developing temperatures, 30, 32 and 34℃, and processing time of 210 seconds. On the other hand, Konica M-200/CM-H was employed as a high speed system. This film was processed in the standard-cycle processing (34℃, 90 seconds). Those systems were compared on contrast, speed, screen-film blur and noise by a characteristic curve, MTF (modulation transfer function) and WS (wiener spectrum). Furthermore, the RMI 165 phantom was used to evaluate visibility of mammographic details of these systems. As a result, in the extended-cycle process at the developing temperatures of 32 or 34°C and processing time of 210 seconds for M-100/CM-H, it was possible to increase the speed as much as the higher speed system, M-200/CM-H. Then the contrast, the MTF and the visibility were also improved as compared to the higher speed system. Furthermore patient dose could be reduced at the developing temperature of 34℃ and processing time of 210 seconds in M-100/CM-H.通常,extended-cycle processは処理時間が約210秒に延ばされた現像機のために使われる用語である｡乳房撮影に使われるような片面乳剤フィルムにおけるextended-cycle processは,フィルムコントラストを増し,感度をあげることが良く知られている｡そこで,本論文ではextended-cycle processにより低感度,高解像度システムの感度を上げ,どの程度解像度が維持されるかを調べた｡片面増感紙／片面フィルムの組合わせであるKonica M-100/CM-Hを低感度,高解像度システムとして用いた｡露光後のフィルムは現像温度30,32, 34度,処理時間210秒の異なる組合わせで現像処理した。一方,高感度システムとしてKonica M-200/CM-Hを用い,このフィルムは標準現像(34℃,90秒)された｡感度,増感紙／フイルムのぼけ,雑音に関して,特性曲線,MTF(modulation transfer function), WS(wiener spectrum)によってこれらのシステムを比較した｡さらにこれらのシステムにおける乳房写真の細部視覚評価のためにRM165ファントムを使用した｡その結果,M-100/CM-Hに対するextended-cycle process現像温度32, 34℃,処理時間210秒のextended-cycle processにおいて,高感度システムM-200/CM-Hと同等の感度を上げることが可能であった｡そのとき,コントラスト,MTF,視覚的検出能も高感度システムより向上した｡さらに,現像温度34℃,処理時間210秒では,被曝線量の低減が可能であった