Effect of Body Condition Score (BCS) on In Vivo Embryo Production and Pregnancy Rate Following Superovulation in Hanwoo

Gyu-Tae Yeom,Hae-Geum Park1,Nam-Tae Kim,Sung-Woo Kim,Hyun Kim,Yoon-Jung Do,Young-Sin Kim,Soo-Bong Park,Jae-Hwan Kim,Sang-Rae Cho,Jae-Hyeon Cho,Yeoung-Gyu Ko 韓國受精卵移植學會 2013 한국동물생명공학회지 Vol.28 No.1

Body condition score (BCS) is a useful management tool for distinguishing differences in nutritional needs of cows in the herd. Although it is not always possible to quantify the nutrient content of the feed supplied to the donor cow, the nutritional status can be determined by the BCS. The objective of this study was to evaluate in vivo embryo production, return to estrous of donor and pregnancy rate of recipients following BCS in Hanwoo superovulation. Sixty nine Hanwoo donor cows were flushed on day 7 of estrus cycle with same FSH and artificial insemination by the same technicians. Embryos were recovered on 7 days after the third insemination by flushing the uterus with Embryo Collection Medium. The results obtained were as follows: No differences were observed in the efficiency of superovulation rates regardless of BCS (≤2.0, 2.5 to 3.0, and ≥3.5). The mean number of total embryos was each 5.20±0.86, 11.56±1.04, and 6.23±1.07. The mean number of transferable embryo from ≤2.0, 2.5 to 3.0, and ≥3.5 of BCS was 2.60±0.87, 7.94±0.89, and 4.75±1.32, respectively (p<0.05). Return to estrous regardless of donor BCS was no difference. The pregnancy rates of recipient were BCS ≤2.0 11.76%, 2.5 to 3.0 40.79%, and ≥3.5 11.11%, following transfer of fresh embryos produced in vivo, respectively. These results indicate that if the Hanwoo with BCS 2.5 to 3.3 are used for donor and recipient, the embryo production and the conception rate will be greater.

AC PDP 네 투명 유전층의 절연내력과 투과율에 관한 연구

박정후,이성현,손재봉,김규섭,조정수 釜山大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.54 No.-

AC PDP(plasma display panel)는 40인치 이상의 대화면 디스플레이 장치로서, AC PDP내 투명 유전층은 방전플라즈마중의 양이온 충격에 의해서 금속전극이 스파터되는 것을 보호하고, 유전층 표면에 벽전하를 형성하여 대화면 구동에 필요한 메모리기능을 부가하므로 방전 cell구조에서 필수적인 부분이다. 이러한 유전층은 우수한 절연내력을 가져야할 뿐 아니라 가시광을 투과시키기 위한 높은 투과율이 요구된다. 따라서 본 연구에서는 여러 조건들 하에서 유전층의 절연내력과 투과율에 관하여 논하였다. 그 결과 15μm 두께를 가지고 570℃에서 소성을 행한 유전층의 경우 최소 29V/μm의 절연 내력을 가졌고, 80%정도의 투과율을 나타내었다. 그러므로 AC PDP에서 적정유전층의 두께는 최고인 가전압에 대해서 약 80V 정도의 마진을 가지는 15μm정도가 적당하다고 생각된다. AC PDP(plasma display panel) is large display panel over 40 inch. The transparent dielectric layers in AC PDP are essential to the discharge cell structure, because they protect metal electrodes from sputtering by positive ion bombarding in discharge plasma and form a sheath of wall charges which are essential to memory function necessary to drive large panel. This layer should have high dielectric strength, and also be transparent because visiable light must pass through this layer. Therefore in this paper, we discussed the dielectric strength and transmittance coefficient of the dielectric layer under various conditions. As a result, on the 15μm thickness, the minimum dielectric strength was 29V/μm and the transmittance coefficient was about 80% after 570℃ firing process. It is considered that the resonable dielectric thickness in AC PDP is 15μm because it has about 80V margin on the maximum applied voltage.

Li₂ZrO₃계의 CO₂반응에 따른 전기적 성질

박진성,이현규 조선대학교 생산기술연구소 1999 生産技術硏究 Vol.21 No.2

A carbon dioxide gas sensor was studied as a function of temperature and CO₂concentration In the Li₂ZrO₃ system. Lithium zirconatet(Li₂ZrO₃) was synthesized by the heat-treatment of zirconia(ZrO₂) and Lithium carbonate(Li₂ZrO₃). The specimens were prepared both as bulk disks. 10mm in diameter and 1.0mm thickness, and thick films on an alumina substrate. Lithium zirconate readily responded to CO₂ concentration from 0.1% to 100% in the range of 450℃ to 650℃. The sensitivity to CO₂ was dependent on the measuring temperature. Lithium zirconate(Li₂ZrO₃) decomposes into Li₂ZrO₃ and ZrO₂ after the reaction with CO₂ in the range of 450℃ to 650℃, and Li₂ZrO₃ changes into Li₂O and CO₂ above 650℃. The material showed difficulty with reversibility and recovery. The optimum temperature for the highest sensitivity is around 550℃.

수술을 시행한 치루환자 277예에 대한 분석

박현규,김한선 대한대장항문학회 1996 Annals of Coloproctolgy Vol.12 No.3

TMS320F240을 이용한 PWM 인버터 유도전동기 구동 시스템의 전도노이즈 저감을 위한 스위칭 기법

朴奎炫,金利勳,元忠淵,金奎植,崔世琓,咸年根 성균관대학교 2003 학술회의지원논문목록집 Vol.2003 No.-

PWM 인버터에 의해 구동되는 유도전동기에 발생되는 고주파 커먼 모드 전압은 전도성 EMI, 전동기 접지전류, 베어링 전류 및 다른 원치 않는 결과의 주원인이 된다. 인버터 제어의 무효벡터 스위칭 상태는 나머지 유효벡터 스위칭 상태에 비교하여 큰 커먼 모드 전압을 일으킨다. 그러므로 이 논문은 커먼 모드 전압을 완화하는 스위칭기법을 다룬다. 즉 정현파 PWM기법을 기본으로 한 커먼 모드 전압 제거방법을 제안하였다. PWM 신호는 각각의 정현파 기준신호와 120˚위상차가 나는 3개의 캐리어 파형과 비교하여 발생된다. 시뮬레이션과 실험적결과는 제안된 PWM 기법에서 커먼 모드 전압이 종래의 PWM 기법보다 약 66% 더 저감됨을 보였다. High frequency common mode voltage produced by PWM inverter fed induction motor is a major cause of conducted EMI. creation motor ground currents, bearing currents and other hamful products. The zero switching states of inverter control invoke large in comparison with the non-zero switching state of inverter control. We proposed a common mode voltage reduction method based on sinusoidal PWM technique. PWM signal are generated by comparing respective sinusoidal reference signal with three triangular carrier wave displaced of 120˚. Simulation and experimental result show that common mode voltages in the propsed PWM technique are reduced by approximate 66% more than conventional PWM technique.

Java 병행프로그래밍 도구의 개발

박양수,김현규,문남두,이명준 울산대학교 1999 공학연구논문집 Vol.30 No.2

분산응용시스템은 서비스의 효율향상을 위해 일반적으로 병행성을 지원하는 것이 바람직하다. 그러나 병행성을 지원하기 위한 프로그래밍 기법은 난이도가 높은 구현 기법이며, 대부분의 프로그래밍 언어에서 이를 직접적으로 지원하지 않으므로, 분산응용시스템을 위한 개발자의 부담을 가중시키고 있다. 본 논문에서는 현재 분산응용시스템의 작성에 널리 쓰이고 있는 Java에서 병행성을 체계적으로 지원하기 위한 기반으로서, 세미포어나 조건변수와 같은 고수준 동기화 도구의 개발에 대해 소개하였다. 이러한 Java고수준 동기화 도구는 순수한 Java로 개발되어 이식성을 지니고 있으며, 개발자가 쉽게 기술할 수 있는 인터페이스를 제공하고 있다. 또한 Java가 지닌 대중성으로 인해 대부분의 분산응용시스템의 구축에 널리 사용될 수 있을 것으로 기대된다. In a development of distributed applications, it is desirable for a server to support concurrency in order to provide effective services. However, the programming mechanism for concurrency is difficult to implement correctly, so most programming languages do not support this facility directly. Therefore, the fact imposes extra burdens to the developers for distributed applications. The high-level synchronization tools such as Semaphores and Condition Variables in Java are suggested as a basis for systematically supporting concurrency control. The suggested high-level synchronization tools also have a good portability since it has developed in pure Java. In addition, due to the popularity of Java, these tools will ho a long way with developers in building distributed systems.

중국에서 改修된 ≪金鰲新話≫ 작품 : ≪東海遺聞≫ <李生>과 <梁生>

朴現圭 한중인문학회 2004 한중인문학연구 Vol.13 No.-

筆者在本篇論文中向國內外學界介紹了發現的中國尹蘊淸修改的朝鮮金時習的《金鰲新話》這篇作品。 尹蘊淸在《東海遺聞》中收錄了分別根据《金鰲新話》《李生窺墻傳》和《萬福寺摴浦記》修改的《李生》和《梁生》兩篇文章。《東海遺聞》于民國1年(1912)在天津印刷, 民國3年 發行。 尹蘊淸把在題本東京求得的明治刻本《金鰲新話》作爲底本, 進行了大規模的修改工作。 本文內容的修改程度大約是一半的程度。 這次《金鰲新話》在傳記小說的故鄕中國出版發行。 對于我們具有深的意義。 這次發現了中國的修訂版, 因此談論東亞流通的傳記小說的淵源和傳播時, 就要以《金鰲新話》這部新作品爲中心, 引起關注。 《金鰲新話》在日本流傳以來 ,引起了日本文壇的極大反響。 日本文士們對刻板《金鰲新話》幾版都加上了訓點和注釋。 另外, 淺井了意的《伽婢子》中還改編了《金鰲新話》。中國修訂版《金鰲新話》的出現, 雖然對于中國文壇的震動沒有日本文壇那麽强烈, 但是可以証明中國學者和讀者們對于朝鮮的漢文小說充分的理解幷得到流傳。 以後談到傳記小說在東亞的傳播過程和生命力時, 《金鰲新話》這個新的中心點小說要和明瞿佑的《剪灯新話》一起談論的話, 可以相信會成爲21世紀東亞漢字文化圈的漢文學發展和硏究的新的方向和探索。 I discovered Kim, Siseub' Geumo sinhwa on which Yin, Yunqing of China had made improvements using Meiji edition of the work and introduced it through this paper to the academic circle at home and abroad. The fact that Geumo sinhwa was newly published this time in China, the home of Chuanqi fiction is very meaningful for us. We can evolve the work as a new axis in discussing the origin and the substance of Chuanqi fiction which had circulated in Eastern Asia as the improved edition of China. Geumo sinhwa has evoked Japanese literati had published several times books printed by engraved block, marked punctuation, annotated it and moreover adapted some of Geumo sinhwa. The emergence of the improved Chinese edition of Geumo sinhwa has proved that Chinese scholars and readers have been understood well and circulated it, even though Chinese literary circle did not evoke an echo greatly like that of Japan. I believe that Geumo sinhwa, a new axis, along with Jiandeng xinhua by Qu You of Ming dynasty, will give us a new direction to improve the development of studying Chinese classics of Eastern Asia in the 21st century.

Analysis of Genetic Diversity of Korean Wheat Cultivars Using Microsatellite DNA Polymorphisms

Park,Yong-Jin,Cho,Gyu-Taek,Ma,Kyung-Ho,Lee,Sok-Young,Lee,Jung-Ro,Kim,Young-Chang,Cho,Eun-Gi,Kim Chang-Yung,Nam,Jung-Hyun,Rao,V,Ramanatha,Kang,Hee-Kyoung 한국자원식물학회 2004 Plant Resources Vol.7 No.2

Genetic background and phylogenetic relationships among 20 Korean wheat cultivars were assessed using microsatellites after amplifying with 13 SSR primer pairs. Average allele number per primer pair was 3.36. Genetic similarities for every pair of cultivars ranged from 0.42 to 0.97, with 0.69 of overall average. Korean cultivars were divided into two major groups based on microsatellite DNA polymorphisms. Group I consisted of relatively old cultivars developed until 1970s, and group II contained the recent cultivars developed during 1980s and 1990s. Amongst old elite cultivars/lines, ‘Yukseung 3’, ‘Norin 12’ and ‘Norin 72’ contributed most to the genetic background of cultivars belonging to group I, and ‘Norin 4’, ‘Norin 12’, ‘Norin 43’ and ‘Norin 72’ to group II, respectively. The phylogenetic relationship of Korean wheat cultivars was in accordance with the genealogical data of each cultivar. The genetic background of each cultivar was assessed from the point of breeding and germplasm management such as variety identification and duplicated accessions for assisting in developing a system for the registration of new variety based on the molecular characterization in future.

제품디자인의 심리적 안락성에 관한 연구

박규현 대구대학교 인문과학 예술문화연구소 1999 人文科學硏究 Vol.18 No.-

土壓과 輪壓에 따른 淺層地中理設管의 變形量 分析

박종엽,상현규,류권일,김팔규 충남대학교 산업기술연구소 2002 산업기술연구논문집 Vol.17 No.1

In this paper, indoor soil tank is used to measure the deformation of flexible pipe in the soil mass on the theory of Bossinesq's stress and Marston's Ditch Conduit case. Besides, field compaction test is perfomed for compaction effect of the real construction field. In compression test of the pipe in the soil mass, the flexible pipe has 3.5% of the allowed defomation, and 220kg of the allowed compression load. With theories and soil tank test in this study, the allowed deformation ratio of the flexible pipe is determined to be safe at the depth over 40cm. Consequently, it is considered that the quality of the pipe should be maintained, and the development of the high quality pipe is needed for the safe and economical construction. Especially in compaction, inappropriate compaction could be dangerous.