• Korean journal of applied entomology
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• v.4
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• pp.67-74
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• 1965

The work on the 'Studies of radiosensitivity' in Korea has been initiated since 1959 by the author at various institutions in home and foreign countries, and more than 20000 of plant materials in 73 varieties and 41 kinds are treated under varied conditions for the studies of radiosensitivity in plants. However, a study of the susceptibility to radiation in insect pests as well as their biological effects has not been previously reported in this country. During the year of 1964 and 1965, near 50000 of insects at the stages of adult, egg, larva and pupa in 14 different kinds are irradiated under acute X and gamma rays to investigate the behavior of growth and lethality after irradiation, and thrir general tolerances to radiations are compared by the kind of insects, stage of growth, radiation sources and exposured dosages. Through the experiments, it is shown that the lethality in most of insects are high as several kilo roentgens above and no significant effects on pupation. emergence, and oviposition in the treated generation at the dose of 3 Kr. below, but in the following generation , the rice stem borer for instance, no oviposition or decreased laying is observed from the dosages at 3 Kr. to 1 Kr., and the hatching was possible from 1.5 Kr. below of irradiated larvae although laying and hatching are seemed in normal. In general, the lethal dose $50\%$ of tested infect materials at the larval stage can he classified some what 60-80 Kr. for Pine caterpillar, Fall webworm, Camphor silk moth and their relatives, at 40-60 Kr. for Gypsy moth, Monley prominent and some relatives and at 20-30 Kr. for House fly, Rice weevil, Pine sawfly etc. Plant parasitic nematodes such as Hirschmannia and Paratylenchus shown very high resistance to radiation and the LD-50 is observed from 100 Kr. or above. A concept to evaluate the radiosensitivity in insects by taxological family line as a practical measure is not answerable yet, but it ran he solved within the near future through the continuing experiments.

• Journal of the Ergonomics Society of Korea
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• v.35 no.5
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• pp.343-359
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• 2016

Objective:In this study, we designed working clothes for livestock farmers to wear in spring and autumn to improve their work efficiency, conducted a physiological test on their performance, and evaluated their comfort. Background: In recent years, livestock farming in Korea has expanded, yet farmers' safety and sanitation levels remain low in hazardous environments that include organic dust, toxic gas, and heat stress, as well as the risk of accidents. Furthermore, most livestock farmers wear ordinary or dust-resistant clothes that are unsuitable for rearing livestock and compromise their safety and health. Thus, it is important to design specialized working clothes for livestock farmers that are comfortable and that minimize their health and safety risks. Method: To this end, we examined the literature on livestock (poultry, swine, and cattle) farmers' safety and sanitation issues, designed appropriate working clothes, and tested them in terms of sensory feel, physiological response, and subjective comfort. Results: The respondents expressed satisfaction with the new working clothes. The results of a physiological test showed a decline in temperature and humidity inside the clothes, a lower pulse rate, and a lower oxygen intake compared to the measurements taken when famers wore their previous working clothes. This indicates a fall in heat stress and fatigue, which was mostly consistent with the results of the assessment of subjective comfort. Conclusion: The results of the analysis show an improvement in the comfort of the new working clothes compared to the dust-resistant clothes that are widely worn. Based on this study, the new working clothes need to be further tested and evaluated to improve the design. Application: This study is expected to contribute to designing better working clothes for livestock farmers.

• English Language & Literature Teaching
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• v.12 no.4
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• pp.235-251
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• 2006

This study aims to analyze what Saul Bellow wants to define "Love" in his recent work, More Die of Heartbreak. As a humanist, Saul Bellow is concerned about materialism in Post-modern age through his works. Today there are so many people that are hurt by the failure of love or experience heartbreak. We need to sense invisible danger all around us. We can find Bellovian love in More Die of Heartbreak. Bellow suggests that there should be "true love" between people, especially between men and women. But Kenneth Trachtenberg and Benn Crader have selfish and materialistic love. Kenneth had only a sensual desire for Treckie who is his daughter's mother. He cannot persuade Treckie to marry him. Benn, a middle-aged widower, peremptorily marries Matilda Layamon who is much younger than he. Unfortunately, the marriage brings him neither peace nor love. Benn recognizes his wrong conception of love through the death of Mrs. Bedell and Villitzer, and breaking off a marriage with Matilda. He decides to go to Antarctica. This is not an escape. This is his determination to save himself. At the North Pole he sets out to recover his gift of vision and redeem his fall from grace. He will desert his materialistic and absurd self. After the expedition, he will experience rebirth as an authentic human being who has acceptable eyes. Kenneth and Benn learn to conceive of love as one of man's strongest inner energies, for it is through love that you can penetrate to the essence of human being. In this study I try to define Bellovian love. In More Die of Heartbreak, love is a spiritual power that may even transfigure man.

• Journal of agricultural medicine and community health
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• v.18 no.1
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• pp.93-102
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• 1993

The symptoms of farmer's syndrome that occurred to Korean farmers are due to the specific characteristics of Korean agriculture, and the basic reasons are poverty and less-privileged rural cultural life originated from social and political conditions. Then the purposes of this study are to investigate farmer's syndrome of farmers and to get substantial data to make a strategy that could prevent diseases. The results are as follows: 1. The most common symptom was lumbago(83.0%) among the 7 kinds of symptoms of farmer's syndrome. And it was more common among women who deliver babies and also work house chores and 10 farms than men(p<0.05). 2. The numbers of symptoms of farmer's syndrome increased as age increases and, 71.4% of those aged 70-79 complained some of the symptoms. 3. The accident rate due to agricultural machine was significantly higher in men than women(p<0.05). By frequency contusion was the most common trauma, fall, fracture were the nexts, and the age group with highest accident rate(40%) was those aged 20-29. 4. To see the significantly correlated factors between faemer's syndrome and sociodemo graphic variables, the more the numbers of family members were, the more lumbago and the less heartburn occurred. And the less gross income was the more frequent nocturnal urinary frequency occurred, and the wider the farming land was the more frequent noctural urinary frequency occurred. 5. As result of correlation coefficient between the numbers of illnesses and sociodemographic variables, the larger the family was and the larger the farming land was the more illnesses the subjects had, and those without spouses had more illnesses.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.20 no.11
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• pp.1130-1137
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• 2009

This paper proposes a new clock routing design for suppressing clock harmonic effects in a Printed Circuit Board (PCB) for a terrestrial Digital Multimedia Broadcasting(DMB) system. Typical crystal reference frequencies that are widely used in DMB tuners are 16.384 MHz, 19.2 MHz, 24.576 MHz. When the high-order harmonic components of these reference frequencies fall near the RF channel frequencies, receiver sensitivity of the tuners is seriously degraded. In this work, we propose a new clock routing design in order to address the clock harmonic coupling issue. The proposed design incorporates two inductors for isolating the clock ground from the main ground, and adopts a new strip line-style routing instead of the conventional microstrip line style routing to minimize the overlap area with the main ground. As a result, the RF sensitivity of the T-DMB tuner is improved by 2 dB.

• Journal of Families and Better Life
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• v.29 no.2
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• pp.13-22
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• 2011

Since environmental problems were globalized, discussions on 'Sustainable Development' started from Rio Declaration on Environment and Development(Rio Agenda 21). In Korea, the idea of 'Green Growth' was introduced and generalized since the celebration speech made on 8.15(Independence Day of South Korea) on 2008. And Low Carbon- Green Growth Basic Law was established on 2010. There are 3 strategies and 10 sub-tasks to achieve green country-traffic and green revolution of life. Family resource management is capable of changing life style from energy wasty to ecologically green. The value of family resource management plays a critical role in changing the lifestyle through influencing the goal and standard setting. So, this study is aimed to suggest the green value and green way of life from the perspective of family resource management. Results are as follow. First, the green value is to change from 'material-oriented' to 'people-oriented'. The 'material-oriented value pursues pleasure from possessing, but the 'people-oriented' value pursues pleasure from being itself. Second, the change from the value of 'human-mastery of the nature' to the value of 'mother -nature' is necessary. The value of 'human-mastery of the nature' seeks pleasure from the velocity and tangible outcome. But the value of 'mother- nature' seeks pleasure from the time to relax and slow way of life. 'Third, the change from the value of 'individualism' to the value of 'community sprit' is necessary. Individualism focuses on man's achievement, which may fall into family egoism. And the green way of life suggests the change from 'results-oriented' to 'enjoy the process itself", from 'consumption' to 'ecological restoration' and from 'work to home and then home to community'.

• Journal of the Korean Society of Food Science and Nutrition
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• v.13 no.4
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• pp.437-443
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• 1984

Muscular exercise induced by electrical stimulation of femoral nerves in perfused rat hindquarters(5 contractions per sec) in the presence of insulin and glucose effected a rapid increase(c. a. two-fold) in the level of citric acid cycle intermediates. The highest values were found within one minute of stimulation. The tissue concent ratios of lactate, pyruvate and alanine increased rapidly on initiation of exercese. Release of lactate also increased rapidly, whereas that of pyruvate was only moderately elevated. In the course of three minute exercese, the sum of alanine, glutamate and aspartate was only transiently elevated. A fall in creatine-p and ATP in the stimulated muscle was accompanied by increases in tissue level of AMP and release of ammonia into perfusing medium. However, the changes in glutamine were small. It is concluded that the pool of citric acid cycle intermediates is expanded during muscular work due (a) to an elevated level of pyruvate, leading to shifts in the levels of alanine and cycle intermediates vie trans-amination reactions and (b) to stimulation of the purine nucleotide cycle due to elevated AMP, resulting in generation of cycle intermediates and ammonia at the expense of aspartate.

• Education of Primary School Mathematics
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• v.14 no.2
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• pp.103-116
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• 2011

'The nine chapters on the mathematical art' has dominated the history of Chinese mathematics. It contains 246 problems and their solutions, which fall into nine categories that are firmly based on practical needs. But it has been greatly by improved by the commentary given Liu Hui and it was transformed from arithmetic text to mathematics. The improved book served as important textbook in China but also the East Asian countries for the past 2000 years. Also It is comparable in significance to Euclid's Elements in the West. In the middle of 19th century, Chosun mathematicians Nam Byung Gil(南秉吉) and Lee Sang Hyuk(李尙爀) studied mathematical structures developed in Song(宋) and Yuan(元) eras on top of their early on 'The nine chapters' and 'ShuLiJingYun(數理精蘊)'. Their studies gave rise to a momentum for a prominent development of Choson mathematics in the century. Nam Byung Gil is also commentator on 'The Nine Chapters'. His commentary is 'GuJangSulHae(九章術解)'. This book provides figures and explanations of how the algorithms work. These are very helpful for prospective elementary teachers. We try to plan programs of elementary teacher education on the basis of 'The Nine Chapters' and 'GuJangSulHae'.

• The Plant Pathology Journal
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• v.29 no.3
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• pp.242-248
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• 2013

In the Northeast of Brazil, expansion of guava crops has been impaired by Meloidogyne enterolobii that causes root galls, leaf fall and plant death. Considering the fact that arbuscular mycorrhizal Fungi (AMF) improve plant growth giving protection against damages by plant pathogens, this work was carried out to select AMF efficient to increase production of guava seedlings and their tolerance to M. enterolobii. Seedlings of guava were inoculated with 200 spores of Gigaspora albida, Glomus etunicatum or Acaulospora longula and 55 days later with 4,000 eggs of M. enterolobii. The interactions between the AMF and M. enterolobii were assessed by measuring leaf number, aerial dry biomass, $CO_2$ evolution and arbuscular and total mycorrhizal colonization. In general, plant growth was improved by the treatments with A. longula or with G. albida. The presence of the nematode decreased arbuscular colonization and increased general enzymatic activity. Higher dehydrogenase activity occurred with the A. longula treatment and $CO_2$ evolution was higher in the control with the nematode. More spores and higher production of glomalin-related soil proteins were observed in the treatment with G. albida. The numbers of galls, egg masses and eggs were reduced in the presence of A. longula. Inoculation with this fungus benefitted plant growth and decreased nematode reproduction.

• Korean Journal of Veterinary Research
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• v.15 no.2
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• pp.181-185
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• 1975

The experiment was carried out to determine the concentrations of total calcium and inorganic phosphorus of thirty rera obtained from pregnant Holitein cows, six sera from normal non-pregnant cows with one month after delivery, six sera from cows with ovarian cyst and six sera from heifer of sixteen months old. The changes of total calcium and inorganic phosphorus were observed on the 2nd, 4th, 6th, 8th, and l0th month of gestation. The results obtained in this work were summarized as follows: 1. The mean values of total serum calcium obtained from the pregnant group were $9.59{\pm}0.34mg/100ml$, from the non-pregnant group $10.23{\pm}0.47mg/100ml$, from the infertility grou $10.37{\pm}0.27mg/100ml$, and from the heifer group $10.07{\pm}0.20mg/ml$. The change of total serum calcium values in the pregnant group revealed the tendency of decrease as gestation progresses and the lowest value appeared on the sixth month. The mean value of total serum calcium in the pregnant group was lower than those of the other groups, but the differences were not statistically significant. 2. The mean values of serum inorganic phosphorus obtained from the pregnant group were $5.82{\pm}0.31mg/100ml$, from the non-pregnant group $5.92{\pm}0.44mg/100ml$, from the infertility group $5.80{\pm}0.49mg/100ml$, and from the heifer group $5.10{\pm}0.32mg/100ml$. The change during pregnancy showed a slight fall and the lowest value appeared on the sixth month. The differences of serum inorganic phosphorus values between the pregnant group and the other adult groups were not significant, but these adult groups showed a significantly higher value than that of heifer group (p<0.05).