LSF의 우선순위 역전을 해결한 실시간 스케쥴링 전략

유한양,김상욱,김대용,김진호 강원대학교 정보통신연구소 1998 정보통신논문지 Vol.2 No.-

LSF scheduling policy involves the Priority Reversal which reverses the scheduling order of real-time tasks. The slack time of the task currently running isn't decreased under LSF. If the task is preempted by a task newly arrived, therefore, its slack time can become longer than those of other tasks with lower priority. This Priority Reversal can make the task with higher priority miss its deadline. In this paper, we propose a new real-time scheduling policy, Consistent_LSF guarantees consistently the scheduling order of current real-time tasks without regard to any new task. The preempted tasks are maintained in a separate stack and are scheduled earlier than the tasks with lower priority. We evaluate the performance of Consistent_LSF through experiments. The results reveal that Consistent_LSF misses deadline less than LSF across all ranges of system load.

유대인의 大移動과 이스라엘의 農業定着에 關한 硏究

柳泰永,白大鉉 건국대학교 1988 學術誌 Vol.32 No.1

The modern history of Israel was a history of Jewish immigration to Palestine and their development of the society of Erez Yisrael. The wave of Jewish immigration was started in 1880's from Russia, Eastern Europe and all over the world initiated by the Zionist Movement and the Hovevei Zion Movement. Before the State of Israel, all five waves of immigrations brought the Jewish people to Palestine about 450,000 immigrants. These inmmigrants looked on land settlement as a primary condition for the rejuvenation of the Jewish people. During the biginning of the immigration, the first Jewish agricultural settlements, such as Petah Tikvah, Rishion Le Zion, Rosh Pina, Zikhron Yaakov, and Hedera, were established and the foundations of the Yishuv were alid. After the wave of Second Aliyah, new methods of land settlement (kibbutzim) were adopted, and the foundation was laid for the whole Palestine and the first mixed farming villages (Moshav Ovedim) lvere established. The first Jewish agricultural settlement in Palestine was begun in the 1870's by a small nucleus of the population in Palestine. These days, there are 227 kibbutzim with 91,700 total population and affiliated with the six federations of kibbutz movements. On the other hand, in the moshav movement, there are 349 rnoshavim with 127,900 total population and affiliated with the seven federations of moshav movements. Between the moshav movement and the kibbutz movement, there are sandwitzi a type of settlement, between moshav and kibbutz, moshav shittufi. The moshavim shittuffyyim movement also have 6,500 population with 29 settlements. (see table 21.) The moshav movement was rapidly developed after the State of Israel more so than the kibbut3 movement because the mass of immigrants after the founding of the State of Israel were from many different sources. These immigrants were more like capitalist or less ideological than the immigrants who came before the statehood. However, both of them have contributed to establishment the State of Israel and the development of farming in Israel. Recently, the kibbutz movement has decided to establish the industrial factories in the kibbutzim. These days, most of the kibbutz, have industrial factories, sometimes with the hired labourers from outside. I think kibbutzim will be develop very well and the kibbutzim will become larger industrial groups, and will be very rich villages. On the other hand, the moshav settlements can not be the industrial villages because of their structure of small holders' settlement. However, to the other developing countries, the applicability of moshav principles for agricultural development and for the development of rural societies is usefull. Therefore, this paper discribed and analysed the moshav movement in depth as a considerable countermeasure to the developing countries from Israeli moshav settlement principles.

비글개에서 l-muscone의 급성독성 및 아급성독성시험 연구

유아선,권오경,성하정,곽형일,방명주,박대규,정규혁,윤효인,조명행 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1

Single and 4 weeks oral administration of l-muscone, a major active ingredient of musk, to beagle dogs of both sexes were performed to investigate both acute and subacute toxicity. Beagle dogs(3 males and 3 females) in acute experiments were administered orally with single dosage of 2,000 ㎎/㎏ and groups of 9 male and 9 female beagle dogs in subacute experiments were given daily different dosage of l-muscone, 0.2㎎/㎏/day(low dosage group), 2 ㎎/㎏/day(middle dosage group), or 20 ㎎/㎏day(high dosage group) once a day for 4 weeks by oral route according to the Established Regulation of Korean Food and Drug Administration(1996.4.16). LD_50 value for beagle dogs was more than 2,000 ㎎/㎏ on oral route for both male and females. In animals administered with l-muscone, there were neither dead animals nor significant changes of body weights. In addition, no differences were found between control and treated groups in clinical signs, urinalysis, eye examination, hematology, serum chemistry, organ weight and other findings. No histolopathological lesions were observed in both control and treatment groups. Above data strongly suggest that l-muscone in beagle dogs is considered to be safe.

腦腫瘍의 神經精神科的인 側面

兪漢益,尹大炫,柳仁鈞 서울醫大 1997 精神醫學 Vol.22 No.1

Methyl Methacylate/Vinyl Acetate/Toluene 라디칼공중합계에 대한 속도론적 연구

마영대,원유찬 단국대학교 1997 論文集 Vol.31 No.-

The free-radical copolymerization of methy methacrylate and vinyl acetate at 40℃ in toluene was examined by the steady-state polymerization. The following results were obtained: The copolyemr composition confirms the terminal model. The reactivity ratios of this system agree with those of the bulk system within the experiment error, which means that the solvent had very little effect on the copolymer composition of this system. Velocity-of-copolymerization data were interpreted on the basis of the current notions that the penultimate unit effect with respect to absolute values of propagation rate constant (but not with respect to the monomer reactivity ratios) is a general rule and the termination step is well represented by the penultimate model with the geometric mean approximaton. By using these models, a new equation was derivied, which was found to describe experimental data well.

聞慶炭田 의 地質

李裕大 釜山大學校 師範大學 1977 교사교육연구 Vol.4 No.2

The Munkyung Coal Field is located in Munkyung-Gun, Kyeongsangbuk-Do. The area has been surveyed at first by Shiraggi, Japanese geologiest in 1935. Geology of the area consists mainly of sedimentary rocks as'Cambro- Ordovician Chosen System, .disconformably overlain by the upper Carboniferous-Triassic Pyeongan System, which lies in angular unconformity beneath the Jurassic Daedong System. All Formations within the three Systems are conformable to one another. The Chosen System is classified into the Gurangri Formation and the Daebongri Limestone Formation, belonging to the great Limestone Series. The Daedong System is classified into a basal Conglomerate Formation, Buunryung Formation, Ongzomri Formation, Neori Formation. Bongmyungri Formation and Bongmyungsan Formation.. The sedimentary rocks are intruded by the Cretaceous granite in the northern and southern parts of the Coal Field.

免疫組織化學的 方法에 依한 마우스組織에서의 Toxoplasma 抗原 檢出에 關한 硏究

趙裕行,李英河,羅榮彦,辛大煥 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

This study was performed to identify the Toxoplasma antigens from the mice tissue chronically infected with Toxoplasma gondii Beverley strain by peroxidase-antiperoxidase(PAP) method. The 21 mice divided into two groups, control group (3mice) and cortisone-treated group (18mice). In cortisone-treated group, the mice were injected with 0.5mg of cortisone acetate twice a week for 6 week subcutaneously and 3 mice were sacrified at each week. The brain, lung, heart, liver, spleen, kidney, small intestine and skeletal muscle of mice were removed immediately after death. The removed tissues were fixed with 10% buffered neutral formalin, and then PAP method and H-E staining were done. The results were obtained as follows: 1. The cysts were found in the brain entirely, in the heart at 4 weeks, and in the skeletal muscle at 5 weeks. The number and size of cysts in the brain were increased in proportion to total dose of cortisone acetate in mice. Tachyzoites of Toxoplasma gondii showed at 4, 5 and 6 week in brain. 2. The brain, speen and skeletal muscle showed highly positive immunoreactivity. The liver, heart and small intestine were moderately positive, but lung and kidney showed weekly positive immunoreactivity by PAP method. 3. There were a chronic inflammatory responses in the brain, liver and heart but the remaining organs were almost normal appearance. And tachyzoites were found in the brain, associated with severe inflammatory changes. The present study revealed that tachyzoites and immunoreactivity of Toxoplasma were easily detected by PAP immune complex method.

N-벤조일-이미다졸 유도체의 가수분해반응

성대동,엄태섭,이종팔,박유미,박현석 東亞大學校 1992 東亞論叢 Vol.29 No.1

The pseudo first order rates for hydrolyses of N-benzoyl-(2,4,5-triphenyl)-imidazole and N-benzoyl-(4,5-diphenyl)-imidazole have been measured by means of spectrometry in over all pH range at 30˚C with the ionic strength of 0.5M KC1. In the case of N-benzoyl-(2,4,5-triphenyl)-imidazole, the general acid catalytic reaction was not observed, while the general base catalytic reaction showed in near the range of pH=7. In the case of N-benzoyl-(4,5-diphenyl)-imidazole, the general acid and base catalytic reaction showed at the regions of less than pH=4 and more than pH=10. The rate constants for pH independent reaction of N-benzoyl-(2,4,5,-triphenyl)-imidazole were shown a little bit faster than those of the corresponding to N-benzoyl-(4,5-diphenyl)-imidazole. The reaction mechanism of pH independent reaction was interpreted by means of thermodynamic parameters, and the isotope effect. The magni-tude of ΔH??, ΔS??, ??/?? values indicated that the bond breaking had been progressed more than bond formation in the transition state.

1-Arylpyrrole로부터 9-Arylcarbazole의 합성

朴유미,金寅植,李龍均,成大東,金東賢,金倫瑛,鄭大一 東亞大學校附設基礎科學硏究所 1997 基礎科學硏究論文集 Vol.14 No.1

Carbazoles were discovered in anthracene oil of coal tar, and are the parent structure of a number of heterocyclic compounds. Much attention has been paid to carbazole derivatives recently as the materials for semiconductors and photoconductive compounds. Many conventional methods for synthesis of carbazoles were known such as Grabe-Ullmann methods and the Tauber methods. In the course of the investigation for the synthesis of pyrrole derivatives 3. We have found the formation of 9-arylcarbazoles 4 under refluxing glacial acetic acid. Thus we report the results here.

慶南 泗川地域 慶尙系 洛東層群의 堆積岩石學的 硏究

李裕大 釜山大學校 師範大學 1979 교사교육연구 Vol.6 No.2

廣尙系 洛東層群의 堆積作用 및 堆積環境을 究明하기 爲하여 砂岩의 粒度와 構成鑛物을 分析하고 아울러 粘土 鑛物을 X-ray 回折分析을 한 結果 洛東層群은 河成 및 湖成 堆積境下에서 形成되었으며 本層群의 起源岩은 西使에 分布한 先캄브리아紀의 變成岩類로 생각된다.