• Journal of Families and Better Life
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• v.23 no.4 s.76
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• pp.55-65
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• 2005

Although increasing number of children are being raised by grandparents these days, little research exists on the development of the children in this arrangement. This study aimed at examining school adjustment of the children raised by grandparents, by comparing academic achievement and general classroom and school behaviors of the children in grandparent families with those of their peers from other types of families such as two-parents, single parent, kinship and institution care, and single parent with grandparent(s). Three hundred and twenty four 2nd graders md two hundred ninety eight 5th graders were surveyed for this study. It was found that children raised solely by grandparents did quite well, relative to children in traditional families where two parents were present. Children from single-parent families were significantly worse in school achievement and study habits than children in traditional nuclear families. Girls obtained higher scores on school achievement and study habits whereas they showed lower scores on problem behaviors than boys. There was also an interaction effect between family structure and gender of child in school achievement.

• ETRI Journal
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• v.26 no.6
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• pp.575-582
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• 2004

Fully-depleted silicon-on-insulator (FD-SOI) devices with a 15 nm SOI layer thickness and 60 nm gate lengths for analog applications have been investigated. The Si selective epitaxial growth (SEG) process was well optimized. Both the single- raised (SR) and double-raised (DR) source/drain (S/D) processes have been studied to reduce parasitic series resistance and improve device performance. For the DR S/D process, the saturation currents of both NMOS and PMOS are improved by 8 and 18%, respectively, compared with the SR S/D process. The self-heating effect is evaluated for both body contact and body floating SOI devices. The body contact transistor shows a reduced self-heating ratio, compared with the body floating transistor. The static noise margin of an SOI device with a $1.1\;{\mu}m^2$ 6T-SRAM cell is 190 mV, and the ring oscillator speed is improved by 25 % compared with bulk devices. The DR S/D process shows a higher open loop voltage gain than the SR S/D process. A 15 nm ultra-thin body (UTB) SOI device with a DR S/D process shows the same level of noise characteristics at both the body contact and body floating transistors. Also, we observed that noise characteristics of a 15 nm UTB SOI device are comparable to those of bulk Si devices.

• Journal of the Korean Home Economics Association
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• v.43 no.6 s.208
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• pp.61-79
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• 2005

The purpose of this study was to determine the leading causes of choosing to be single through in-depth interview. In the study I applied Hermeneutic Phenology to clarify the relationship between the past experiences and values of the subjects. I analyzed the leading causes that have drawn them to stay single, and the gender differences on the two subjects. The causes of being single were divided into two categories; personal factors and socio-environmental factors. The personal factors were standard value by birth order, expectation from parents, overcoming economic difficulty, and lack of interest toward the opposite sex. The socio-environmental factors were achievement at work, and ease of living. Staving single is not a special way of life. As found in the study, the cause of being single is not determined at birth, but rather results from being raised to be single in a way. The main cause of being single was basically based on the environment in which they were raised including parents' attitudes, economic situation, and sibling order We are living in a society of diversity. Being and staying single is a personal choice, that is one aspect of diversity. Therefore we need to widen our vision to accept the single life as one of the normal life styles and one for special treatment. We have to approve of other people's life styles as long as of causes no harm for the development of society. On the other hand, we need to be more serious about the family itself and having family. Finally I think we need to develop various family programs targeted at a diverse range of families rather than only at the normal family.

• Journal of the Korean Society of Costume
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• v.51 no.8
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• pp.61-75
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• 2001

This study is designed to compare the evaluations of university students on clothing before and after the IMF crisis in Korea. The conclusions of this study are as follows : First, consumers' perceived quality, value and purchase willingness on high price are raised after the IMF crisis in single cue context. Second. consumers' perceived quality, value and purchase willingness on famous brand are raised after the IMF crisis in single cue context. Third, brand has more effect on quality and purchase willingness than price after the IMF crisis. Fourth, consumers' perceived value and purchase willingness get based on the comparison of both pence and brand after the IMF crisis. Fifth, the highest purchase willingness of university students occurs in the multiple cue context of low price and famous brand both before and after the IMF crisis.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.25 no.5
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• pp.39-45
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• 2002

Since 100PPM Qualify Certification System has been established by the Industrial Advancement Administration in 1995, 1000PPM Quality Innovation Movement has contributed much to the enhancement of quality competitiveness of Korea's parts industry. And in 2000, raised to a higher level, Single PPM Quality Certification System has been established by the Small and Medium Business Administration. Single PPM Qualify Innovation Movement seeks to reduce the number of defects to below 10 out of one million industrial items produced. Ultimately, Single PPM Quality Innovation Movement aims at achieving perfection, by enabling a zero defect rate in industrial production through the participation of all members of an organization. So this study aims to show the tangible and intangible effects of Single PPM Quality Certification System. and to suggest a methodology to improve current problems of Single PPM Quality Innovation Movement.

• Korean Journal of Veterinary Service
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• v.21 no.4
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• pp.391-400
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• 1998

In order to survey the prevalence of intestinal parasites in dogs, 304 fecal samples were taken from dogs in Taejon city, The prevalence and identification of intestinal parasites were determined by the fecal examinations using sheather's floating technique and sedimentation methods and then Cryptosporidium oocysts were identified by kinyoun's modified acid fast stainning method. The results were obtained as follows ; 1. Parasite eggs and oocysts were detected in 105 samples (34.5%) from 304 cases of dog feces. 2. The 11 kinds of eggs and oocysts were isolated from the feces of dog. Those were Ancylostoma caninum (12.1%, 37 dogs), Trichuris vulpis (11.5%, 35 dogs), Toxocara canis (10.2%, 31 dogs), Isospora sp (7.2%, 22 dogs), Cryptosporidium sp (3.6%, 11 dogs), Toxascaris leonine (1.9%, 6 dogs), Strongyloides sp (1.9%, 6 dogs), Taenia sp (0.6%, 2 dogs), Diphylidium caninum (0.3%, 1 dog), Spirometra sp (0.3%, 1 dog) and Clonorchis sinensis (0.3%, 1 dog). 3. It was mixed infection such as single, double, triple and quadruple, 64.8%, 25.7%, 8.6% and 0.9%, respectively. 4. In indiviually-raised 4095, the infectious late of T canis (11.4%), A Caninum(13.2%), Cryptosporidium sp (6.1%), T leontna (2.6%) were higher than those of group raised dogs. But the infectious rate of T vulpis (12.1%) in group raised dogs was higher than that of individually-raised dogs. 5. Adults of Demodex and Sarcoptes which have been found in this survey are excluded in this report.

• Proceedings of the Society of Korea Industrial and System Engineering Conference
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• 2002.05a
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• pp.265-272
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• 2002

Since 100PPM Quality Certification System has been established by the Industrial Advancement Administration in 1995, 100PPM Quality Innovation Movement has contributed much to the enhancement of quality competitiveness of Korea's parts industry. And in 2000, raised to a higher level, Single PPM Quality Certification System has been established by the Small and Medium Business Administration. Single PPM Quality Innovation Movement seeks to reduce the number of defects to below 10, out of one million industrial items produced. Ultimately, Single PPM Quality Innovation Movement aims at achieving perfection, by enabling a zero defect rate In industrial production through the participation of all members of an organization. So this study aims to show the tangible and intangible effects of Single PPM Quality Certification System. and to suggest a methodology to improve current problems of Single PPM Quality Innovation Movement.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.1
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• pp.78-84
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• 2011

In this paper, the switching frequency and THD for the reduction instead of traditional single phase inverter using a new type of central arm of the single phase inverter is proposed. The proposed single phase inverter topology, the existing one to add a arm by two-way central switch 3-level output voltage can be raised and, central arm, especially one or two of the switches by using a switch to the diode current switching algorithm was simplified. During the dead time because of this, depending on the direction of the current level does not appear in any other existing level compared to the inverter output voltage level of the THD has the advantage that less can be. The simulation and experimental results verified the validity of the proposed topology.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.8
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• pp.82-89
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• 2014

The industrial products to use single phase inverter are raised the necessity of power quality improvement, such as AC Motor Driver, Lighting, Renewable energy power converter. Also, it is increasing that applied the single phase multilevel inverter for high quality power at renewable energy power converter. Especially, the photovoltaic multilevel inverters have at least more than two DC_Link and more than one DC/DC Converter. This paper proposes a triple output DC/DC Converter with one switch for photovoltaic multilevel inverter. The proposed converter has advantages of low cost and volume because it has one switch. The operation principle of the converter is analyzed and verified. A prototype is implemented to verify of the proposed converter.

• International Journal of Industrial Entomology and Biomaterials
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• v.2 no.1
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• pp.55-59
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• 2001

The vitellin of the red flour beetled Tribolium castaneum Herbst was purified and characterized. The vitellin of T. castaneum was purified by the FPLC techniques, anion exchange chromatography and gel permeation chromatography. In native-polyacrylamide gel electrophoresis, vitellin of T. castaneum was detected as a single band. This native vitellin has molecular weight of 440 kDa. The vitellin of T. castaneum is composed of three polypeptides, designated Vnl (178 kDa), Vn2 (168 kDa) and Vn3 (52 kDa) in SDS-polyacrylamide gel electrophoresis. Three subunits of vitellin were presented in the female adult hemolymph and egg extracts, but not observed in the male. These three polypeptides gradually decreased during embryogenesis. Polyclonal antiserum raised against purified vitellin reacted with the three polypeptides, Vnl, Vn2 and Vn3. Antisera raised against Vn1 and Vn2 cross-reacted with the two large subunits, Vnl and Vn2, respectively. Another subunits Vn3, however, was not cross-reacted with these two antisera. Also, antiserum raised against Vn3 did not cross-react with the Vn1 and Vn2.