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Cluster Analysis of Car Parking Data, and Development of their Web Applications
Kubota, Takafumi,Hayashi, Takayuki,Tarumi, Tomoyuki The Korean Statistical Society 2011 Communications for statistical applications and me Vol.18 No.4
In this paper, we apply cluster analysis to "Okayama parking data" that is one of the spatial point patterns data that includes locations and the fare structure of car parking space in Okayama central area. This study classifies the characteristics of small areas through Okayama parking data as well as visualizes the results of the cluster analysis. We develop web applications that connect the results of a cluster analysis and overlay objects including points of balloons and rectangles of small areas over a map of Okayama central area.
Accurate and Easy Measurement of Sliding Distance of Intramedullary Nail in Trochanteric Fracture
Nobuaki Chinzei,Takafumi Hiranaka,Takahiro Niikura,Takaaki Fujishiro,Shinya Hayashi,Noriyuki Kanzaki,Shingo Hashimoto,Yoshitada Sakai,Ryosuke Kuroda,Masahiro Kurosaka 대한정형외과학회 2015 Clinics in Orthopedic Surgery Vol.7 No.2
In daily clinical practice, it is essential to properly evaluate the postoperative sliding distance of various femoral head fixation devices (HFD) for trochanteric fractures. Although it is necessary to develop an accurate and reproducible method that is unaffected by inconsistent postoperative limb position on radiography, few studies have examined which method is optimal. Therefore, the purpose of this study is to prospectively compare the accuracy and reproducibility of our four original methods in the measurement of sliding distance of the HFD. Methods: Radiographs of plastic simulated bone implanted with Japanese proximal femoral nail antirotation were taken in five limb postures: neutral, flexion, minute internal rotation, greater external rotation, and flexion with external rotation. Orthopedic surgeons performed five measurements of the sliding distance of the HFD in each of the flowing four methods: nail axis reference (NAR), modified NAR, inner edge reference, and nail tip reference. We also assessed two clinical cases by using these methods and evaluated the intraclass correlation coefficients. Results: The measured values were consistent in the NAR method regardless of limb posture, with an even smaller error when using the modified NAR method. The standard deviation (SD) was high in the nail tip reference method and extremely low in the modified NAR method. In the two clinical cases, the SD was the lowest in the modified NAR method, similar to the results using plastic simulated bone. The intraclass correlation coefficients showed the highest value in the modified NAR method. Conclusions: We conclude that the modified NAR method should be the most recommended based on its accuracy, reproducibility, and usefulness.
Design of Nanocluster Based Material with Catalytic Properties
Tadachika Nakayama,Kim Chang-Yeoul,Tohru Sekino,Choa Yong-Ho,Takafumi Kusunose,Yamato Hayashi,Koichi Niibara 한국분말야금학회 2001 한국분말야금학회지 Vol.8 No.3
Modified inert gas condensation method was used to produce the nanocluster composites of . High-resolution TEM, SEM and catalytic measurements have been used to characterize the samples and study the synergistic effect between the CuO phase and (ceria) support. By varying the He pressure, the heating temperature and configuration of the heating boats inside the modified gas condensation chamber, nanoclusters of varying sizes, shapes and composition can be produced. The composition and nanostructured morphology were shown to influence the catalytic properties of the system. A copper content around 10 at% with a morphology that favors high-energy surfaces of ceria is shown to be beneficial for a high catalytic activity.
Wataru Katagiri,Daisuke Saito,Satoshi Maruyama,Makiko Ike,Hideyoshi Nisiyama,Takafumi Hayashi,Jun-ichi Tanuma,Tadaharu Kobayashi 대한악안면성형재건외과학회 2023 Maxillofacial Plastic Reconstructive Surgery Vol.45 No.-
Background Masticatory muscle tendon-aponeurosis hyperplasia (MMTAH) is a relatively newly identified clinical condition that manifests as trismus with a square-shaped mandible. Herein, we report a case of MMATH that was initially misdiagnosed for polymyositis due to trismus and simultaneous lower limb pain, with literature review. Case presentation A 30-year-old woman had a history of lower limb pain after exertion for 2 years. Initial physical examination had been performed at the Department of General Medicine in our hospital. There was also redness in the hands and fingers. Although polymyositis was suspected, it was denied. The patient visited our department for right maxillary wisdom tooth extraction. Clinical examination revealed that the patient had a square-shaped mandible. The maximal mouth opening was 22 mm. There was no temporomandibular joint pain at the time of opening. Furthermore, there was awareness of clenching while working. Panoramic radiography revealed developed square mandibular angles with flattened condyles. Computed tomography showed enlarged masseter muscles with high-density areas around the anterior and lateral fascia. Magnetic resonance imaging also showed thickened tendons and aponeuroses on the anterior surface and inside bilateral masseter muscles. Finally, the patient was diagnosed with MMTAH. Bilateral aponeurectomy of the masseter muscles with coronoidectomy and masseter muscle myotomy was performed under general anesthesia. The maximum opening during surgery was 48 mm. Mouth opening training was started on day 3 after surgery. Histopathological examination of the surgical specimen showed that the muscle fibers were enlarged to 60 μm. Immunohistochemistry testing for calcineurin, which was associated with muscle hypertrophy due to overload in some case reports, showed positive results. Twelve months after surgery, the mouth self-opening and forced opening were over 35 mm and 44 mm, respectively. Conclusions Herein, we report a case of MMATH. Lower limb pain due to prolonged standing at work and overload due to clenching were considered risk factors for symptoms onset of MMATH.
A Sensor Network using Content-Aware Messaging Network Architecture
Junya Terazono,Hideyuki Fukuhara,Takuto Yamada,Toshiaki Nihei,Kazunori Suzuki,Isamu Koseda,Ryutaro Fujita,Toshiaki Miyazaki,Senroh Saito,Atsushi Kara,Takafumi Hayashi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The present paper describes an approach to the construction of a sensor network using a messaging network. A messaging network is an over lay network with a set of content-aware message handling ca-pabilities. The use of a messaging network can reduce the complexity and maintenance burden of integrated sensor information systems. Message mediation(afunction of the messaging network) enables interoperation of various applications and integration of diverse sensor data. Subscription(an other concept in the messaging network) enables proper information delivery of the sensor data to each user. The proposed approach is helpful in implementing an SOA-based sensor network and enables flexible sensor network configuration and utilization.
Network-centric Mashup for a Sensor Network that uses a Messaging Network
Yooin Choi,Junya Terazono,Kensaku Kawauchi,Kana Itabashi,Hideyuki Fukuhara,Isamu Koseda,Ryutaroh Fujita,Toshiaki Miyazaki,Senro Saito,Jiro Iwase,Takafumi Hayashi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The present paper describes a mashup and an approach by which to integrate a sensor network using a messaging network. A messaging network is an overlay network that has a rich set of message handling capabilities. The use of a messaging network enables the complexity and maintenance burden of the integrated sensor information systems to be reduced. Mashup refers to the use of different data or services for the purpose of providing value-added information or efficient use of information. The proposed approach generates an SOA-based sensor network design and mashup.