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Longevity of Lucilia sericata (Meigen, 1826) used as pollinator
Shimomae Koichi,Sato Takuya,Yoshida Yuichi,Naing Shine Shane,Miyatake Takahisa 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.4
Pollinators play an important role in the production of many agricultural products. Honeybees, Apis mellifera L., are leading pollinators, but the number of honeybees in the world is declining. Finding alternatives is beginning to be important. In the present study, we compared the longevity of Lucilia sericata (Meigen, 1826), which is used as a pollinator, in cages in the laboratory and in a vinyl greenhouse under controlled feeding conditions. First, we showed that the longevity of the flies was significantly extended (c.a. 40 days) in the laboratory when water and sugar were supplied compared to the cases without sugar and/or water. Second, we found that the average longevity was 20 days with water and sugar in cages kept in a vinyl greenhouse during the summer. Finally, we released marked flies into a vinyl greenhouse where strawberries were cultivated without feeding water or sugar in the spring. As a result, fewer than 10% of the flies survived 10 days after release. Based on the result, we discuss the use of this species as a pollinator in the context of its survival rate.
Two-Dimensional Theoretical Study on Flow Characteristics of a Spiral-Channel Viscous Micropump
Donghyuk Kang,Koichi Nishibe,Kotaro Sato,Kazuhiko Yokota 한국유체기계학회 2018 International journal of fluid machinery and syste Vol.11 No.4
This study investigates the flow characteristics of a spiral-channel viscous micropump using two-dimensional theoretical analysis. The obtained results are compared to the results obtained from experiments, numerical simulations, and the theoretical analysis of Kilani et al., and the similarities and differences between these approaches are discussed. The present two-dimensional theoretical approach is validated. Its accuracy is improved as compared to previous work by setting the spiral-channel axis as the spiral-channel length from the pump inlet to the outlet and by considering the moving wall as a component in the spiral-channel direction of the circumferential velocity of the rotating disk. Furthermore, the present two-dimensional analysis can accurately predict pump performance, even though the actual flow in the micropump is three dimensional.
Three-Dimensional Theoretical Study on Flow Characteristics of a Spiral-Channel Viscous Micropump
Donghyuk Kang,Koichi Nishibe,Kotaro Sato,Kazuhiko Yokota 한국유체기계학회 2019 International journal of fluid machinery and syste Vol.12 No.2
Technological developments have led to micropumps playing an ever-greater role at the heart of micro total analysis systems. Spiral-channel viscous micropumps have been studied theoretically, numerically, and experimentally. However, high-accuracy performance predictions have not been achieved over a wide range of operating conditions. The present study proposes three-dimensional and quasi-three-dimensional theoretical expressions for predicting the pressure performance of spiral-channel viscous micropumps in low-Reynolds-number environments. The theoretical analysis is validated through a series of comparisons with numerical simulation results for the pressure performance curves, velocity distributions, velocity gradient distributions, and channel internal pressure distributions. Furthermore, the influence of the channel aspect ratio on the performance characteristics is investigated.
Hajime Ohira,Koichi Sato,Tadaaki Tsutsumi,Shingo Kaneko,최혁재 국립중앙과학관 2018 Journal of Asia-Pacific Biodiversity Vol.11 No.3
Pseudoscorpions are one of the common arthropod in soil mesofauna but are infrequently studied in East Asia. The fauna in South Korea is not adequate enough, and practical faunistic survey of pseudoscorpions have not been conducted in last 20 years. In this article, the current pseudoscorpion fauna in South Korea is reviewed, and the results of the survey in Chungcheongnam-do Province, the DNA barcoding (mitochondrial DNA cytochrome c oxidase I sequencing) and molecular phylogenetic analysis are shown. A total 64 specimens, including four species, Allochthonius (Allochthonius) buanensis, Bisetocreagris japonica, Bisetocreagris turkestanica (first record from South Korea), and Microbisium pygmaeum, were collected. The result of molecular phylogenetic analysis based on the cytochrome c oxidase I sequences (427 bp) implied the existence of a possible cryptic species within A. (A.) buanensis. Faunistic survey and DNA barcoding of South Korean species can greatly contribute to the understanding of East Asian pseudoscorpion systematics.
Mitsuhiko Takahashi,Ryosuke Sato,Kenji Kondo,Koichi Sairyo 대한초음파의학회 2018 ULTRASONOGRAPHY Vol.37 No.2
Purpose: The aim of this study was to elucidate whether intrasynovial corticosteroid injections for trigger digit reduced the volume of the tendon and pulley on high-resolution ultrasonography. Methods: Twenty-three digits of 20 patients with trigger digit were included. Each affected finger was graded clinically according to the following classification: grade I for pre-triggering, grade II for active triggering, grade III for passive triggering, and grade IV for presence of contracture. Axial ultrasound examinations were performed before an intrasynovial corticosteroid injection and at an average of 31 days after the injection. The transverse diameter, thickness, and crosssectional area of the tendon and the thickness of the pulley were measured by two independent, blinded researchers. Results: At least 1 grade of improvement was achieved in this study group by the time of the second examination. The transverse diameter and cross-sectional area of the tendon and the thickness of the pulley significantly decreased (P<0.05). Conclusion: The injection of a single dose of betamethasone improved clinical symptoms by reducing the volume of both the tendon and pulley, which may be related to the fact that tendon and pulley ruptures are delayed by corticosteroid injections.
Yasuyuki Maekawa,Shosuke Miyamoto,Koichi Sawai,Yoshiaki Shibagaki,Toru Sato,Mamoru Yamamoto,Hiroyuki Hashiguchi,Shoichiro Fukao 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Rain attenuation characteristics of the Ku-band up-link satellite signals are presented for the past four years of 2003-2006 in Japan and Indonesia, using Japan’ domestic communication satellite Superbird C that connects Research Institute for Sustainable Humanosphere of Kyoto University (RISH) to Equatorial Atmosphere Radar Observatory (EAR). Compared with the rainfall rates with the same time percentages, equivalent path lengths of the satellite signal against the rain area are shown to be reduced down to 2 km at EAR, which is remarkably shorter than those at RISH in Japan. The almost same attenuation values and annual statistics are, however, obtained from the X-band radar observations simultaneously conducted at EAR. This suggests that long-term radar observations of convective clouds are effective to estimate rain attenuation statistics of the satellite signals in the tropical regions.
( Yasuhiro Fujiwara ),( Masatsugu Okuyama ),( Yasuaki Nagami ),( Koichi Taira ),( Hirotaka Ishizu ),( Osamu Takaishi ),( Hiroshi Sato ),( Toshio Watanabe ) 대한소화기기능성질환·운동학회 2021 Journal of Neurogastroenterology and Motility (JNM Vol.27 No.4
Background/Aims Belching is the act of expelling gas from the stomach or esophagus noisily through the oral cavity. Although it is a physiological phenomenon, belching may also be a symptom of upper gastrointestinal diseases such as reflux esophagitis and functional dyspepsia (FD). A detailed epidemiology of belching has not yet been reported. The aim of this study is to examine the prevalence and clinical characteristics of clinically significant belching (CSB) in adults. Methods We analyzed 1998 subjects who visited the hospital for annual health checkups. Belching was evaluated by a simple question “Do you burp a lot?” and scored as 0 (never), 1 (occasionally), 2 (sometimes), 3 (often), or 4 (always). Subjects with CSB were defined as having scores ≥ 3. We also collected the clinical parameters, endoscopic findings, and data according to the Athens Insomnia Scale, Rome IV questionnaire, and Hospital Anxiety and Depression Scale (HADS). Results Of the 1998 subjects, 121 (6.1%) had CSB. Subjects with CSB had FD more commonly than reflux esophagitis, but presence of heartburn was high (10.7% vs 3.1%). In addition, the HADS and Athens Insomnia Scale scores in subjects with CSB were significantly higher than those in subjects without CSB. Presence of heartburn (OR, 2.07; 95% CI, 1.05-4.09), presence of FD (OR, 2.12; 95% CI, 1.33-3.36), anxiety/depression (OR, 2.29; 95% CI 1.51-3.45), and sleep disturbances (OR, 1.73; 95% CI, 1.14-2.61) were significantly associated with CSB. Conclusion The detailed epidemiology of belching in the general adult population was clarified. (J Neurogastroenterol Motil 2021;27:581-587)
Consideration of a Face Recognition System with Real-time and Robustness
Hitoshi Horiuchi,Satoru Kaneko,Mie Sato,Koichi Ozaki,Masao Kasuga 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
Capability of recognition, collision avoidance and communication with humans in natural is required for robots coexisting with humans. It is important that real-time and robust image processing for face recognition in a real environment. In this paper, we have developed a method of face recognition no depending on direction and size of human faces on various images. This method is include preprocess of a pattern matching algorithm based on the HSV color coordinate system and a rapid search algorithm by using the Genetic Algorithm (GA). For accurate face recognition, extracted images by an edge filter are used when a value of fitness on GA is evaluated. As a result, this system extracted face with about 65% accuracy.
Chung Eric,Jiann Bang-Ping,Nagao Koichi,Hakim Lukman,Huang William,Lee Joe,Lin Haocheng,Mai Dung Ba Tien,Nguyen Quang,박현준,Sato Yoshikazu,Tantiwongse Kavirach,Yuan Yiming,Park Kwangsung 대한남성과학회 2021 The World Journal of Men's Health Vol.39 No.4
Purpose: COVID pandemic significantly affected the delivery and maintenance of healthcare system, resulting in greater utilization of digital health interventions. Materials and Methods: This multi-national cross-sectional survey was administered to clinicians working in major Asia-Pacific cities during the mandatory social lockdown period in June 2020. Clinical demographics and professional data, delivery of Andrology-related healthcare services, and patient distress based on validated questionnaires such as Depression and Anxiety Stress Scales (DASS) and Decisional Engagement Scale (DES) were collected. Results: Telehealth medicine was instituted in all the centres with the majority of centres (92.9%) reported a 50% or more reduction in out-patient related services. The numbers of phone calls, emails correspondence and educational webinars have significantly increased. Despite the provision of reasons for changes in healthcare service and delay in surgery, more than half of the patients (57.1%) rated 2 on the DASS score for the item on patients over-react to situations, while a third of the patients (35.7%) scored a 2 for DASS item on patients being more demanding or unreasonable. The DES scores were more positive with most patients reported a score above 7 out of 10 in terms of items on accepting current arrangement (85.7%), confident in clinician decision-making about treatment (92.9%) and comfortable that the decision is consistent with their preferences (71.4%). Most patients (85.7%) indicated their preferences for more detailed information on healthcare provision. Conclusions: Our study showed telehealth services were integrated early and successfully during the COVID pandemic and patients were generally receptive with minimal psychosocial distress.