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Researchers＇ Attitudes towards Varietal Development of Hybrid Rice： A Case Study in Myanmar

Journal of Life Sciences 2018年第2期12卷 111-116页

作者： Naing Kyi Win Kyaw Kyaw Win cho cho san Nyein Nyein Htwe Yezin Agricultural University Zayarthiri Township Naypyitaw 15031 Myanmar

The purpose of this study was to identify the existing rice breeding programs in Myanmar and to determine researchers＇ attitudes on hybrid rice research mid its determinmlts. A sample consists of 56 researchers who are working in Department of Agricultural Research, Department of Agriculture and Yezin Agricultural University, and involving varietal development of hybrid rice. The research instruments were a questionnaire used by 4 points Likert scale of strongly agree, agree, less agree and not agree to measure on researchers＇ attitudes towards 14 determinants of varietal development of hybrid rice production. The study revealed that the average age of the researchers was 46.5 years ranged from 25 to 60 years. The majority of researchers were 51-60 years old （41.1%）. The working experience of researchers ranged from 5 to 36 years and the metal of their experience was 20 years. The educational level was Ph.D. （35.7%）, ***. （26.8%）, and ***. （37.5%）. Majority of researchers were female （76.8%） and 58.9% were rice breeders. Moreover, 48.2% of researchers obtained the hybrid rice technology from breeding training and the researchers who believed in their current breeding works were 51.8%. Among 33 rice breeders, 72.7% of the rice breeders applied only convention breeding method. In addition, researchers＇ opinions on farmer＇s perception of hybrid rice technology, 60.7% of the researchers agreed on inferior grain quality and 73.2% of researchers strongly agreed on not stable market. This study found out more thin1 half of the researchers strongly agreed on 10 out of 14 determinmlts such as poor infrastructure, low human resource development, parental problem, insufficient experience, limit germplasm resource, limit research facilities, no incentive for breeders, weak public-private partnership, fewer quality breeders and not enough research fund. Moreover, half of the researchers agreed on 3 determinants likely need special technical training, need international

关键词： Researchers' attitudes hybrid rice varietal development determinants.

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Ungraded Matrix Factorizations as Mirrors of Non-orientable Lagrangians

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Acta Mathematica Sinica,English Series 2024年第1期40卷 26-42页

作者： Lino AMORIM Cheol-Hyun cho Department of Mathematics Kansas State University138 Cardwell Hall1228 N.17th StreetManhattanKS 66506USA Department of Mathematical Sciences Research Institute of MathematicsSeoul National UniversitySan 56-1ShinrimdongGwanakguSeoul 47907South Korea

We introduce the notion of ungraded matrix factorization as a mirror of non-orientable Lagrangian *** ungraded matrix factorization of a polynomial W,with coefficients in a field of characteristic 2,is a square matrix Q of polynomial entries satisfying Q^(2)=W·*** then show that non-orientable Lagrangians correspond to ungraded matrix factorizations under the localized mirror functor and illustrate this construction in a few *** main example is the Lagrangian submanifold RP^(2)⊂CP^(2)and its mirror ungraded matrix factorization,which we construct and *** particular,we prove a version of Homological Mirror Symmetry in this setting.

关键词： Mirror symmetry non-orientable Lagrangian submanifold matrix factorization

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Analyzing the Roles of Agricultural Extension Agents in Hybrid Rice Technology Decision-Making Process of Farmers

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Economics World 2018年第4期6卷 303-313页

作者： Naing Kyi Win Kyaw Kyaw Win cho cho san Nyein Nyein Htwe Yezin Agricultural University Zeyarthiri TownshipNay Pyi TawMyanmar

The study determined the roles of agricultural extension in hybrid rice technology decision-making process by extension agents,Nay Pyi Taw,*** specific objectives were:to study personal characteristics of agricultural extension agents,experiences and their roles,to identify extension agents’opinion on hybrid rice technology decision-making process,and to determine relationship between the roles of agricultural extension agents and decision-making process of hybrid rice *** hundred and eight extension agents were collected who were working in Department of Agriculture,Nay Pyi Taw area and surveyed and interviewed by *** study revealed that majority of agricultural extension agents(65.7%)were female staffs and most of extension agents(40.7%)were under 30 years as young *** of extension agents(81.5%)were educated only *** than half(54.6%)had one to five-year experiences in employment and 58.3%had no hybrid rice training experience and source of information regarding the hybrid rice production was received 63.9%from Department of Agriculture(DOA).Study found that there was highly significant relationship between most of the roles of agricultural extension agents and hybrid rice technology decision-making process of stages 4 and *** then most of the extension agents’roles singnificantly related with stage 2 except role of conducting introduction of hybrid seeds and distribution through by Seed *** which was highly ***,most of the roles of extension agents significantly related with stage *** stages 1 and 6 were no singnificantly *** above all,a well structure seed business,Good Agricultural Practices and farm level mechanization and quality extension service are very important to increase the adoption of hybrid rice in Myanmar.

关键词： agricultural extension agents’roles hybrid rice decision-making process

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Effects of a dynamic membrane formed with polyethylene glycol on the ultrafiltration of natural organic matter

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Frontiers of Environmental Science & Engineering 2010年第2期4卷 172-182页

作者： Boksoon KWON Noeon PARK Jaeweon cho Woongjin R&D Center San 4-1Nakseongdae-dongGwanak-guSeoul 151-057Korea Korea Institute of S&T Evaluation and Planning Yangjae-dongSeocho-guSeoul 137-130Korea Department of Environmental Science and Engineering GIST1 Oryong-dongBuk-guGwangju 500-712Korea

The formation of a dynamic membrane(DM)was investigated using polyethylene glycol(PEG)(molecular weight of 35000 g/mol,concentration of 1 g/L).Two natural organic matters(NOM),Dongbok Lake NOM(DLNOM)and Suwannee River NOM(SRNOM)were used in the ultrafiltration experiments along with *** evaluate the effects of the DM with PEG on ultrafiltration,various transport experiments were conducted,and the analyses of the NOM in the membrane feed and permeate were performed using high performance size exclusion chromatography,and the effective pore size distribution(effective PSD)and effective molecular weight cut off(effective MWCO)were *** advantages of DM formed with PEG can be summarized as follows:(1)PEG interferes with NOM transmission through the ultrafiltration membrane pores by increasing the retention coefficient of NOM in UF membranes,and(2)low removal of NOM by the DM is affected by external factors,such as pressure increases during UF membrane filtration,which decreases the effective PSD and effective MWCO of UF ***,a disadvantage of the DM with PEG was severe flux decline;thus,one must be mindful of both the positive and negative influences of the DM when optimizing the UF performance of the membrane.

关键词： dynamic membrane natural organic matters ultrafiltration membrane performance effective PSD effective molecular weight cutoff

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Embedded Surfaces for Symplectic Circle Actions

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Chinese Annals of Mathematics,Series B 2017年第6期38卷 1197-1212页

作者： Yunhyung cho Min Kyu KIM Dong Youp SUH Department of Mathematics Education Sungkyunkwan UniversitySeoulRepublic of Korea. Department of Mathematics Education Gyeongin National University of EducationSan 59-12Gyesan-dongGyeyang-guIncheon 407-753Republic of Korea. Department of IVIathematieal Sciences KAIST335 GwahangnoYu-sung GuDaejeon 305-701Republic of Korea.

The purpose of this article is to characterize symplectic and Hamiltonian circle actions on symplectic manifolds in terms of symplectic embeddings of Riemann *** precisely, it is shown that(1) if(M, ω) admits a Hamiltonian S^1-action, then there exists a two-sphere S in M with positive symplectic area satisfying c1(M, ω), [S] > 0,and(2) if the action is non-Hamiltonian, then there exists an S^1-invariant symplectic2-torus T in(M, ω) such that c1(M, ω), [T] = 0. As applications, the authors give a very simple proof of the following well-known theorem which was proved by Atiyah-Bott,Lupton-Oprea, and Ono: Suppose that(M, ω) is a smooth closed symplectic manifold satisfying c1(M, ω) = λ· [ω] for some λ∈ R and G is a compact connected Lie group acting effectively on M preserving ω. Then(1) if λ 0, then the G-action is Hamiltonian.

关键词： Symplectic geometry Hamiltonian action

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Data-driven,client-centric applied behavior analysis treatment-dose optimization improves functional outcomes

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世界儿科杂志:英文版 2023年第8期19卷 753-760页

作者： Andrey Ostrovsky Melissa Willa Ted cho Maxwell Strandberg Sage Howard Colin Davitian Social Innovation Ventures LewesDEUSA Kyo San FranciscoCAUSA UCSF Beniof Children’s Hospital San FranciscoCAUSA SKF Group GöteborgSweden

Background With increasing numbers of individuals diagnosed with autism spectrum disorder(ASD)and with affirmation of applied behavior analysis(ABA)as an evidence-based standard of care for ASD,there has been a proliferation of agencies offering ABA services over the last several *** exists among ABA providers and health plans that reimburse those providers on the optimal number of hours of ABA services that should be *** study aims to understand whether children who receive more hours of ABA therapy achieve better outcomes and to evaluate the impact of the COVID-19-induced shift to telehealth clinical supervision on *** A retrospective cohort analysis was performed using data from the Vineland 3 Comprehensive Interview Form to assess function throughout ABA *** sample t tests,independent sample t tests,Cohen’s D,and Pearson correlations were used to determine relationships between Vineland scores and input variables including hours of service and modality of supervision(in-person ***).Results While statistically and clinically significant improvements in function were observed,children appear to have improved outcomes independent of the number of hours of service *** were also no significant associations between modality of supervision and Vineland standard *** These findings challenge prior research that demonstrated a linear dose–response *** tailoring treatment dosage to the individual client’s needs,providers may be able to better maximize functional progress of the client,to preserve family time,and to utilize health plan dollars more efficiently.

关键词： Autism spectrum disorder(ASD) Autistic disorder Autistic rehabilitation Autistic therapy Telemedicine

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Revisiting the conversion reaction voltage and the reversibility of the CuF2 electrode in Li-ion batteries

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Nano Research 2017年第12期10卷 4232-4244页

作者： Joon Kyo Seo Hyung-Man cho Katsunori Takahara Karena W. Chapman Olaf J. Borkiewicz Mahsa Sina Y. Shirley Meng Department of NanoEngineering University of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA Materials Science and Engineering University of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA X-ray Science Division Advanced Photon Source Argonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA

Deviation between thermodynamic and experimental voltages is one of the key issues in Li-ion conversion-type electrode materials; the factor that affects this phenomenon has not been understood well in spite of its importance. In this work, we combine first principles calculations and electrochemical experiments with characterization tools to probe the conversion reaction voltage of transition metal difluorides MF2（M = Fe, Ni, and Cu）. We find that the conversion reaction voltage is heavily dependent on the size of the metal nanoparticles generated. The surface energy of metal nanoparticles appears to penalize the reaction energy, which results in a lower voltage compared to the thermodynamic voltage of a bulk-phase reaction. Furthermore, we develop a reversible CuF2 electrode coated with NiO. Electron energy loss spectroscopy （EELS） elemental maps demonstrate that the lithiation process mostly occurs in the area of high NiO content. This suggests that NiO can be considered a suitable artificial solid electrolyte interphase that prevents direct contact between Cu nanoparticles and the electrolyte. Thus, it alleviates Cu dissolution into the electrolyte and improves the reversibility of CuF2.

关键词： Li-ion battery conversion material reaction voltage nanoparticle reversibility coating

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乳腺癌骨转移的临床相关因素分析

乳腺癌骨转移的临床相关因素分析

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作者：邱忆梦（cho NO san）广西医科大学

学位级别：硕士

目的：探讨乳腺癌发生骨转移临床高危因素,为乳腺癌骨转移早期诊断及治疗提供依据。方法：对2007年1月至2015年4月之间在广西医科大学第一附属医院住院的200例乳腺癌患者的临床资料进行回顾性分析。收集患者资料：年龄、已否绝经,肿瘤... 详细信息

目的：探讨乳腺癌发生骨转移临床高危因素,为乳腺癌骨转移早期诊断及治疗提供依据。方法：对2007年1月至2015年4月之间在广西医科大学第一附属医院住院的200例乳腺癌患者的临床资料进行回顾性分析。收集患者资料：年龄、已否绝经,肿瘤分期包括：原发病灶大小、腋窝淋巴结有无转移及转移数目,病理结果：病理类型、激素受体情况、HER-2过表达、分子分型、Ki-67表达、P16、p53,血清CEA、CA125、CA153,乳腺癌治疗方式：手术治疗、化疗、放疗、内分泌治疗与乳腺癌骨转移发生的相关性。结果：200例乳腺癌患者中发生骨转移84例,单因素分析结果示：原发肿瘤大小、腋窝淋巴结转移、HER-2基因过表达、分子分型、Ki-67、P16、血清CEA、CA125、CA153、化疗及内分泌治疗与乳腺癌发生骨转移相关,有统计学意义(P5cm、血清CA125和CA153升高、腋窝淋巴结转移数目增多是乳腺癌发生骨转移危险因素。如患者术后行化疗或激素受体阳性患者行内分泌治疗后骨转移发生率可降低。

关键词：乳腺癌骨转移风险因素

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Design of multi-functional dual hole patterned carbon nanotube composites with superhydrophobicity and durability

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Nano Research 2013年第6期6卷 389-398页

作者： Sung-Hoon Park Eun-Hyoung cho Jinseung Sohn Paul Theilmann Kunmo Chu Sunghee Lee Yoonchul Sohn Dongouk Kim Byunghoon Kim Samsung Advanced Institute of Technology Yong-in 446-712 R. O. Korea Department of Electrical Engineering University of California San Diego La Jolla California 92093 USA

Most current research on nanocomposites has focused on their bulk attributes, i.e., electrical, microwave, thermal, and mechanical properties. In practical applications, surface properties such as robustness against environmental contamination are critical design considerations if intrinsic properties are to be maintained. The aim of this research is to combine the bulk properties of nanocomposites with the superhydrophobic surface properties provided by imprinting techniques to create a single multi-functional system with enhanced bulk properties. We report the development of a highly conductive superhydrophobic nanotube composite, which is directly superimposed with a durable dual hole pattern through imprinting techniques. The dual hole pattern avoids the use of high slenderness ratio structures resulting in a surface which is robust against physical damage. Its stable superhydrophobic properties were characterized both theoretically and experimentally. By incorporating high aspect ratio carbon nanotubes （CNTs）, the dual patterned composites can also be effectively used for anti-icing and deicing applications where their superhydrophobic surface suppresses ice formation and their quick electric heating response at low voltage eliminates remaining frost. In addition, superior electromagnetic interference （EMI） shielding effectiveness （SE） was attained, with one of the highest values ever reported in the literature.

关键词： dual hole nanoimprint lithography superhydrophobic arbon nanotube durability multifunction

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香港女性肺癌，空气污染抑或饮食？——饮食，空气污染与肺癌关系的混杂因素

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肿瘤 1996年第4期16卷 467-474页

作者： LindaC.Koo JH-cho 香港大学医学院社会医学系

从世界范围来说，住在香港、夏威夷、旧金山和新加坡的华裔妇女肺癌发病率相对较高，然而吸烟率低。过去１５年我们以室内空气污染（ＥＴＳ，烧香，烹调污染）为重点，并以饮食为可能因素来探讨它们与肺癌的关系，但未发现这些空气污染... 详细信息

从世界范围来说，住在香港、夏威夷、旧金山和新加坡的华裔妇女肺癌发病率相对较高，然而吸烟率低。过去１５年我们以室内空气污染（ＥＴＳ，烧香，烹调污染）为重点，并以饮食为可能因素来探讨它们与肺癌的关系，但未发现这些空气污染物与肺癌有联系。吸烟者（吸烟量已作了调整）即使有４０年以上烧香史，肺癌危险性仍下降了８３％（趋势检验Ｐ＝０．０１）。不吸烟妇女（年龄、生育史、文化程度已调整）从事烹调即使超过４０年，肺癌危险性仍下降６３％（Ｐ＝０．００１）。可见结果与预期相反，但可用饮食因素来解释。吸烟者中烧香的妇女往往比不烧香的妇女喜欢吃“健康饮食”；不吸烟者参与烹调多年的妇女也更喜欢吃“健康饮食”。健康饮食是指较多吃鲜鱼、蔬菜、水果和较少吃经防腐处理过的食品、辣酱和饮酒，前类食物使香港华人妇女肺癌危险性降低，后者则使之增高，可见饮食因素起着混杂因子的作用。

关键词：饮食妇女肺肿瘤空气污染香港

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