http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effect of photoperiod and temperature on the reproductive responses of Protaetia brevitarsis
( Seonghyun Kim ),( Hae-chul Park ),( Namjung Kim ),( Ingyun Park ) 한국잠사학회 2018 International Journal of Industrial Entomology Vol.37 No.2
In the present study, we investigated the effects of temperature and photoperiod on oviposition of Protaetia brevitarsis . The effects of long- and short-day cycles on oviposition and egg hatching of P. brevitarsis were investigated at different temperatures. Three male-female pairs were confined to oviposition chambers maintained at 20°C, 25°C, 30°C, and 35°C, with 16L:8D and 8L:16D photoperiod. Oviposition was observed at all temperatures. The total number of eggs laid per female was between 46.8 and 110.8, and the optimal temperature for oviposition and fertility was between 20°C and 30°C. Furthermore, it was difficult for the eggs to hatch at 35°C. Fewer eggs were laid under short photoperiod than under long photoperiod at all temperatures. Hatching success was 93.5% at 20°C, 90.9% at 25°C, 71.5% at 30°C and 37.3% at 35°C under long-day(16L:8D) condition and . Temperature had a strong effect on the time to hatching. Neither oviposition nor subsequent egg hatching was influenced by photoperiod and temperature. The information obtained will be useful for mass rearing P. brevitarsis.
Conduction mechanism of organic semiconductor AlQ3: Impedance spectroscopy analysis
Seong Hyun Kim,Sang Chul Lim,Jung Hun Lee,Taehyoung Zyung 한국물리학회 2005 Current Applied Physics Vol.5 No.1
By impedance spectroscopy analysis, the conduction mechanism of the organic semiconductor oftris-(8-hydroxyquinolate)-aluminum (AlQ3) is studied. Equivalent circuit analysis was performed with a series resistance and a pair of a parallel capacitanceand a parallel resistance. It is found that the conduction mechanism seems to be space-charge limited current with exponential trapdistribution, and the dielecric relaxation time of the material is decreased dramatically with increasing applied bias voltages.
Seonghyun Kim,Biju, K P,Minseok Jo,Seungjae Jung,Jubong Park,Joonmyoung Lee,Wootae Lee,Jungho Shin,Sangsu Park,Hyunsang Hwang IEEE 2011 IEEE electron device letters Vol.32 No.5
<P>We investigated the effect of scaling down the device area of WO<I>x</I> resistive random-access memory (RRAM) devices on their switching characteristics. Device dimensions were successfully scaled down to 50 nm using a via-hole structure with additional Al<SUB>2</SUB>O<SUB>3</SUB> sidewall process. As compared to the microscale devices, the nanoscale devices exhibited a distinct switching mechanism and better memory performance, such as improved switching uniformity, larger memory window, and stable endurance characteristics for up to 10<SUP>7</SUP> cycles. This improvement can be explained by a uniform interfacial switching mechanism in nanoscale device; this is in contrast with the defect-induced filamentary switching mechanism observed in microscale devices. In this way, the intrinsic switching properties of RRAMs were obtained by scaling down of the device area, indicating that RRAMs hold considerable promise for future applications.</P>
Effect of temperature on the development of the lesser mealworm, Alphitobius diaperinus
Seonghyun Kim,HaechulPark,IngyunPark 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.10
The developmental responses of insects to temperature are important considerations in gaining a better understandingof their ecology and life histories. Temperature dependent models permit examination of the effect of temperature onthe geographical distributions, population dynamics, and management of insects. The measurements of insect developmentaland survival responses to temperature pose practical challenges that depend. The developmental characteristics of A. diaperinuswere investigated at four temperature regimes (20, 25, 30 and 35℃), a relative humidity of 60%, and a light:dark photoperiodof 16:8h. The developmental time from larva to adult was 129.0, 49.8, 40.5 and 31.9 days at temperatures of 20, 25,30 and 35℃, respectively. Pupal rate was 80.0%, 100%, 83.3% and 91.7% at temperatures of 20, 25, 30 and 35 respectively.There is an increasing need for a standardized manual for rearing this. Pupa had significantly lower weights at 35℃than at the other temperatures. Female pupae (20mg) were significantly heavier than male pupae (17mg).
Impedance Spectroscopy of p-Conjugated Organic Materials
Seong Hyun Kim,양용석,정태형,Hye Yong Chu 한국전자통신연구원 2004 ETRI Journal Vol.26 No.2
AC electrical properties of organic light-emitting diodes with poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV), poly[2,5-bia(dimethyloctylsilyl)-1,4-phenylenevinylene] (BDMOS-PPV), and tris-(8-hydroxyquinolate)- aluminum (AlQ3) as light-emitting materials are studied. The frequency-dependent real and imaginary parts of impedance were fitted using an equivalent circuit. We found that the conduction mechanism is a space-charge limited current with exponential trap distribution.
An artificial diet for the swallowtail butterfly, Papilio xuthus
( Seong Hyun Kim ),( Seong Jin Hong ),( Hae Chul Park ),( Young Bo Lee ),( Kwan Ho Park ),( Won Ho Choi ),( Nam Jung Kim ) 한국잠사학회 2014 International Journal of Industrial Entomology Vol.28 No.1
The effect of an artificial diet on developmental rate, a life history parameter, was examined for the swallowtail butterfly Papilio xuthus. Artificial insect diets are an essential component of many insect rearing systems that produce insects for research purposes. Complex agargelled diets are generally prepared in large batches and used shortly after preparation because the degradation of perishable diet ingredients, such as vitamins and fatty acids, can adversely affect insect quality (Brewer 1984). However, the timing of diet preparation may be inconvenient, and large batches wasteful, if the unused excess is discarded. The percentage of pupation varied considerably, with no significant differences among diets, on which a maximum pupation percentage of 83% was observed. Pellet-type diets were investigated with the aim of developing a more easily prepared diet. The extrusion of the artificial diet under high temperature and pressure may induce desirable chemical and physical changes in the extruded product. The purpose of the present study was to develop an artificial diet for rearing P. xuthus.