NOTES ON THREE-DIMENSIONAL WEAKLY SYMMETRIC SPACES

Kurashima, Kazuo,Oguro, Takashi,Sekigawa, Kouei Korean Mathematical Society 1999 대한수학회보 Vol.36 No.3

In the present paper, we describe the action of isometry groups of 30dimensional weakly symmetric spaces and classify 3-dimensional connected weaky symmetric spaces. Further, we determine 3-dimensional weakly symmetric spaces in terms of the eigen- values of the Ricci transformation.

Removal of Heavy Metals from MSW Fly Ash by Chloride Volatilization

( Kenta Kurashima ),( Shogo Kumagai ),( Tomohito Kameda ),( Yuko Saito ),( Toshiaki Yoshioka ) 한국폐기물자원순환학회(구 한국폐기물학회) 2018 한국폐기물자원순환학회 심포지움 Vol.2018 No.1

New era for mucosal mast cells: their roles in inflammation, allergic immune responses and adjuvant development

Yosuke Kurashima,키요노히로시 생화학분자생물학회 2014 Experimental and molecular medicine Vol.46 No.-

To achieve immune homeostasis in such a harsh environment as the intestinal mucosa, both active and quiescent immunity operate simultaneously. Disruption of gut immune homeostasis leads to the development of intestinal immune diseases such as colitis and food allergies. Among various intestinal innate immune cells, mast cells (MCs) play critical roles in protective immunity against pathogenic microorganisms, especially at mucosal sites. This suggests the potential for a novel MC-targeting type of vaccine adjuvant. Dysregulated activation of MCs also results in inflammatory responses in mucosal compartments. Theregulation of this yin and yang function of MCs remains to be elucidated. In this review, we focus on the roles of mucosal MCs in the regulation of intestinal allergic reaction, inflammation and their potential as a new target for the development of mucosaladjuvants.

Capture of Bactrocera fruit flies (Diptera: Tephritidae) in traps baited with liquid versus solid formulations of male lures

Todd E. Shelly,Rick Kurashima,Jon Nishimoto,A. Diaz,J. Leathers,D. Joseph,M. War 한국응용곤충학회 2011 Journal of Asia-Pacific Entomology Vol.14 No.4

Bactrocera dorsalis (Hendel) and B. cucurbitae (Coquillett) (Diptera: Tephritidae) are important agricultural pests of the Pacific region. Detection and control of these species rely largely on traps baited with malespecific attractants (parapheromones), namely methyl eugenol for B. dorsalis and cue lure for B. cucurbitae. Presently, these lures (plus naled, an insecticide) are applied in liquid form, although this procedure is timeconsuming,and naled as well as methyl eugenol may pose human health risks. Recently, a solid formulation (termed a wafer) has been developed that contains both male lures (plus DDVP, an insecticide), and here we present data from field tests in California and Hawaii that compare the effectiveness of liquid versus solid formulations of the lures in capturing marked, released males of these two Bactrocera species. For both species and in both California and Hawaii, traps baited with the solid formulation of the male lure captured similar or significantly more released flies than the liquid formulation for both fresh and aged baits. Traps in Hawaii also captured wild (unmarked) males of both B. dorsalis and B. cucurbitae, and the results obtained for wild flies were similar to those recorded for released flies for both species. Collectively, the results presented suggest that the solid dispenser of the male lures constitutes a reliable substitute for the liquid formulation in detecting incipient Bactrocera outbreaks

Field evaluation of three-component solid food-based dispenser versus torula yeast for capturing Mediterranean and oriental fruit flies (Diptera: Tephritidae)

Todd Shelly,Rick Kurashima,Thomas Fezza 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.3

Certain species of true fruit flies (Diptera: Tephritidae) are worldwide pests of fruits and vegetables, and many countries operate trapping programs to detect and monitor invasions. Torula yeast-borax (TYB) solution is a widely used food bait, although its effective field longevity is relatively short (1–2 weeks). This led to the development of a synthetic cone-shaped food dispenser that contains ammonium acetate, putrescine, and trimethylamine. The food cone has received limited testing, and the objective of this study was to compare captures of the Mediterranean fruit fly (Ceratitis capitata (Wiedemann)) and the oriental fruit fly (Bactrocera dorsalis (Hendel)) in traps baited with the fresh TYB solution versus traps baited with fresh or weathered food cones. Captures showed a female bias for both baits and both species. For C. capitata, fresh food cones generally attracted more individuals than fresh TYB. Weathered food cones attracted similar or greater numbers of medflies than TYB for the initial two weeks, but food cones weathered for 4 or 6 weeks attracted fewer flies than TYB. For B. dorsalis, TYB-baited traps captured more females than fresh or weathered food cone-baited traps in each of six weekly sampling periods, and the differences were statistically significant in weeks 1–4. In a releaserecapture experiment, both C. capitata and B. dorsalis were captured in higher numbers in traps baited with fresh TYB than those baited with food cones weathered for 0 (fresh) to 6 weeks. The implications of these results for fruit fly surveillance are discussed.

Photosynthetic Performances of Temperate Sargassum and Kelp Species Growing in the Same Habitat

Murakami, Hiroshige,Serisawa, Yukihiko,Kurashima, Akira,Yokohama, Yasutsugu The Korean Society of Phycology 2004 ALGAE Vol.19 No.3

Characteristics of photosynthesis-light and photosynthesis-temperature relationships were seasonally compared among 4 species, two temperate Sargassurn (S. ringgoldianum and S. spathulophyllum) and two temperate kelp (Ecklonia cava and Eisenia bicyclis), growing in the same habitat in Oura Bay, Shimoda, central Japan. The photosynthesis-irradiance (P-I) curve of each species at the in situ temperature and the photosynthesis-temperature (P-T) curve at near saturation irradiance (400μmol·m^(-2)·s^(-1)) were determined by using differential gas-volumeters. Maximum photosynthetic rates (Prnax) for P-I curves of the two Sargassurn species were higher from summer to autumn than from winter to spring, while those of the two kelp species showed little difference among seasons. Net photosynthetic rates (Pn) at 100-400μmol·m^(-2)·s^(-1) of the Sargassurn species were higher than those of the kelp species in autumn, spring and summer, while in winter the rates were about the same between the Sargassurn and kelp species. Among seasons, the light saturation index (1k) values, dark respiration rates and light compensation points of Sargassurn species differed more than those of kelp species. Optimum temperature for P-T curves of Sargassurn species was 29℃ and that of kelp species was 27℃ in summer, while in winter the former was 27℃ and the latter was 25℃. Pn at 400 μmol·m^(-2)·s^(-1) at 10-33℃ of Sargassurn species were considerably higher than those of kelp species from spring to summer, while from autumn to winter the rates at 5-27℃ were about the same between the two. At supra-optimum temperatures, Pn of kelp species decreased more sharply than those of Sargassurn species in each season. These facts indicate that the two temperate Sargassurn species have a higher potential photosynthetic performance under warmer conditions than the two temperate kelp species even though they grow in the same habitat.

Model-Based Control for High-Pressure Fuel Pumps

Yoichi Iihoshi,Shin Yamauchi,Ryusei Miura,Yoshikuni Kurashima,Toshio Hori 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

This document describes a model-based controller for a high-pressure fuel system on a direct injection engine. This controller drives a high-pressure fuel pump with an inverse pump model and keeps injection pressure under control with a disturbance observer and a proportional (P) controller. The designed controller is a two-degrees-of-freedom control that can improve step response time and nominal pulsation at the same time. Theeffectiveness of the proposed method is investigated using real engine experiments and produces successful results compared with a PI controller.

Distance-dependent capture probability ofmale Mediterranean fruit flies in trimedlure-baited traps in Hawaii

Todd Shelly,Jon Nishimoto,Rick Kurashima 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.3

Many countries operate regional trapping programs for the detection of exotic tephritid fruit flies, which because of their polyphagous habits pose a serious threat to fruit and vegetable crops. Detection of the Mediterranean fruit fly (medfly), Ceratitis capitata (Wiedemann), relies primarily on trimedlure (TML), a synthetic malespecific lure, yet few studies have measured the relationship between distance from TML-baited traps and the probability ofmale capture, and consequently the detection sensitivity ofmedfly trapping programs is largely unknown. The present study measured distance-dependent capture probabilities for male C. capitata in TML-baited traps using mark–release–recapture procedures. Releases were performed at distances of 25, 50, 100, and 200m at 4 sites in Hawaii, and the resulting capture rates were used to estimate the minimum detectable population size (detection probability N 99.9%) for a trapping density of 5 TML traps per 2.59 km2 (=1 mi2, the density used in California, USA). Capture rateswere similar for 3 of the sites (6.5%, 3.8%, 1.1%, and 0.1% for the 4 distances, respectively) and yielded an estimated minimum detectable population of ≈2300 males, a value similar to that obtained in a comparable study conducted in California. For unknown reasons, capture rates were significantly lower at the remaining site (1.8%, 0.6%, 0.1%, 0.04%) and the estimated minimum detectable population was correspondingly much larger (≈10,000 males). Implications of these results for medfly detection programs are discussed.

Photosynthetic performanc of temperate Sargassum and kelp species growing in the same habitat

Hiroshige Murakami,Yukihiko Serisawa,Akira Kurashima,Yasutsugu Yokohama 한국조류학회I 2004 ALGAE Vol.19 No.3

Delphi Method Consensus-Based Identification of Primary Trauma Care Skills Required for General Surgeons in Japan

Soichi Murakami,Kazuyuki Hirose,Yo Kurashima,Nagato Sato,Saseem Poudel,Kimitaka Tanaka,Aya Matsui,Yoshitsugu Nakanishi,Toshimichi Asano,Takehiro Noji,Yuma Ebihara,Toru Nakamura,Takahiro Tsuchikawa,Kaz 대한외상중환자외과학회 2023 Journal of Acute Care Surgery Vol.13 No.2

Purpose: General surgeons at regional hospitals should have the primary trauma care skills necessary to treat critically ill trauma patients to withstand transfer. This study was conducted to identify a consensus on primary trauma care skills for general surgeons. Methods: An initial list of acute care surgical skills was compiled, and revised by six trauma experts (acute care surgeons); 33 skills were nominated for inclusion in the Delphi consensus survey. Participants (councilors of the Japanese Society for Acute Care Surgery) were presented with the list of 33 trauma care skills and were asked (using web-based software) to rate how strongly they agreed or disagreed (using a 5-point Likert scale) with the necessity of each skill for a general surgeon. The reliability of consensus was predefined as Cronbach’s α ≥ 0.8, and trauma care skills were considered as primarily required when rated 4 (agree) or 5 (strongly agree) by ≥ 80% participants. Results: There were 117 trauma care specialists contacted to participate in the Delphi consensus survey panel. In the 1st round, 85 specialists participated (response rate: 72.6%). In the 2nd round, 66 specialists participated (response rate: 77.6%). Consensus was achieved after two rounds, reliability using Cronbach’s α was 0.94, and 34 items were identified as primary trauma care skills needed by general surgeons. Conclusion: A consensus-based list of trauma care skills required by general surgeons was developed. This list can facilitate the development of a new trauma training course which has been optimized for general surgeons.