• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제42권5호
• /
• pp.251-258
• /
• 2016

Objectives: The aim of this retrospective study was to investigate factors associated with increased difficulty in the surgical extraction of impacted lower third molars and to improve identification of difficult cases. Materials and Methods: A total of 680 patients who required 762 surgical extractions of impacted lower third molars from 2009 to 2014 were enrolled in the study. Demographic factors, clinical factors, radiographic factors, surgical extraction difficulty, and presumed causes of difficulty were collected. Data were statistically analyzed using IBM SPSS Statistics version 23. Results: Age, sex, depth of impaction, and blurred radiographic image influenced difficulty in surgical extraction. The position of the impacted tooth influenced surgical difficulty, especially when it was accompanied by other factors. Conclusion: It is challenging to design a reliable and practical instrument to predict difficulty in surgical extraction of impacted lower third molars. To identify very difficult cases, root investigation using computed tomography is advised when impacted tooth position suggests difficult extraction.

• 생명과학회지
• /
• 제9권5호
• /
• pp.570-574
• /
• 1999

Investigate the epidemics for influenza outbreaks. The outbreak pattern of the internal patients housed in the 10 designated hospitals was monitered to investigate and the characteristics of the virus isolates are as follows. 232 strains of influenza virus was isolated from the oral specimen of 1,320 respiratory disease patients in Pusan from Oct. 1998 to Jun. 1999. Among these isolates, 222 strains were A-type and the rest were B-type. The outbreak pattern for sex-and age-groups is as follows. The male outbreak was similar to the female outbreak: male outbreak, 47.4% and female outbreak, 52.5%. Most of the patients were less than 10 years old. The monthly influenza outbreak was consistent from Dec. 1998 to Apr. 1999. and The 113 strains from the A-type isolates were A/ Sydney/05/97(H3N2)-like, the 109 strains were A/Beijing/262/95(H1N1)-like, and all of the 10 B-type isolates were B/Harbin/07/94-like.

• 생명과학회지
• /
• 제11권3호
• /
• pp.248-253
• /
• 2001

The outbreak patterns of the internal and external and external patients in the 20 designated hospitals and in 16 health centers were monitored to investigate and the characteristics of the virus isolates were as follows. Two hundreds and thirteen strains of influenza virus were isolated from the oral specimens of 1,686 patients with respiratory disease in Pusan. 1999. Among these isolates, 203 strains were A-type and the rest were B-type. The outbreak patterns for sex and age group were as follows. The male outbreak was similar to the female outbreak: male outbreak, 45.5% and female outbreak, 54.5%. Most of the patients were less than 10 days old. The monthly influenza outbreak was consistent from Jan. to Dec in 1999. The 96 strains from the A-type isolates were A/Sydney/05/97(H3N2)-like, the 107 strains were A/Beijing/262/95(H1N)-like, and all of the 10 B-type isolates were B/Harbin/07/94-like.

• 한국동물학회지
• /
• 제32권4호
• /
• pp.365-373
• /
• 1989

한국산 박새속 조류 Porus maior(박새), Parus ater(진박새), Parus palustris(쇠박새), Parus varius(곤줄박이)의 핵형을 C-banding 방법으로 분석한 결과 ZZ-ZW 염색체를 동정, 확인할 수 있었으며, 구조적 이질염색질의 부위가 일반염색 방법에 의한 핵형 비교에서 보다 종간에 더 많은 차이를 나타냈다. 그러나 일반염색 방법과 C-banding 방법 만으로는 4종간의 종분화 기작을 추측할 수 없었다. The chromosomal analysis of Paws motor, Paws ater, Pahs palustris and Pows varius of the genus Paws in Korea were performed by C-handing method. The identification of sex chromosones was ascertained and the part of constitutive heterochromatin was more different between interspecies than by conventional Giemsa staining method. However, conventional Giemsa staining and C-banding methods could not explain mechanisms of speciation between four species.

• 한국식생활문화학회지
• /
• 제19권2호
• /
• pp.158-169
• /
• 2004

This study was performed in order to investigate to dietary behavior, perceived stress level and their correlations for University students. Dietry behavior of 72% subjects was poor and only 1.8% was good. The dietary behavior of subjects was correlated with their residence type. The overage stress point was $1.76{\pm}0.53$ and female students was more stressed than male. Stress elevate the food uptakes and digestion disorder in female students. 12 Factors of stress was analyzed in University students, identification, study, friends and off-school activity related factors were more influenced in female students and health related factor was dominant in male. The subjects who more stressed in factor of religion and around people were preferred salty taste. Study, friends, health related stress factor effect to digestion and food uptake level. Religion, boy or girl friends and sex related stress factor effect to alcohol uptake

• 대한음성학회:학술대회논문집
• /
• 대한음성학회 2003년도 5월 학술대회지
• /
• pp.23-26
• /
• 2003

This paper presents common speech database collection for telecommunication applications. During 3 year project, we will construct very large scale speech and text databases for speech recognition, speech synthesis, and speaker identification. The common speech database has been considered various communication environments, distribution of speakers' sex, distribution of speakers' age, and distribution of speakers' region. It consists of Korean continuous digit, isolated words, and sentences which reflects Korean phonetic coverage. In addition, it consists of various pronunciation style such as read speech, dialogue speech, and semi-spontaneous speech. Thanks to the common speech databases, the duplicated resources of Korean speech industries are prohibited. It encourages domestic speech industries and activate speech technology domestic market.

• Fisheries and Aquatic Sciences
• /
• 제27권2호
• /
• pp.57-65
• /
• 2024

Paiche (Arapaima gigas), is a colossal freshwater fish native to the Amazon basin. Its geographic distribution spans various regions, including Brazil, Peru, Colombia, and Guyana, making it a significant component of the aquatic ecosystems in this area. Beyond its ecological role, the paiche holds substantial importance as a valuable fish resource for local communities, providing sustenance and economic opportunities. This review provides a comprehensive analysis of the reproductive aspects of the paiche, based on information published from January 2000 to January 2022. It encompasses a wide range of reproductive characteristics, including sexual differentiation, age at first maturity, and identification techniques. Additionally, it offers an evaluation of various mating behaviors, highlighting their respective advantages and disadvantages. The review also explores genetic and behavioral traits observed in both wild and captive specimens, offering valuable insights for the effective management of breeding programs.

• 한국패류학회지
• /
• 제28권2호
• /
• pp.175-185
• /
• 2012

북한강에 서식하고 있는 참다슬기의 산란생태를 파악하기 위하여 생식소 발달단계에 따른 생식주기, 성비, 군성숙도, 보육낭유생의 월별변화 등 번식생태와 관련된 생물학적 기초 자료를 조사하였다. 각고에 대한 각경, 전중, 육중의 상관계수 ($R^2$) 는 0.7761-0.8719로 비교적 높은 상관관계를 나타내었다. 참다슬기의 암컷 생식소는 청록색, 수컷 생식소는 옅은 황색을 띠고, 암컷은 유생을 기르는 보육낭 (brood pouch) 을 가지고 있었다. 암수성비는 0.17-0.58의 범위로 계절적 불균형이 심하였으며, 여름철 암컷 비율이 높고 겨울철 암컷비율이 낮았다. 생식소의 조직학적 조사 및 비만지수, 생식소지수 조사 결과 봄, 가을에 두 번의 정점을 나타낸 후 급격히 떨어지는 경향을 보여 생식소 발달은 봄, 가을 연 2회 이루어짐을 알 수 있으며, 암컷 보육낭속의 유생수 월별변화도 연중 두 번의 피크를 나타냈었고, 보육낭속의 유생수는 월 평균 286-975범위로, 11월에 연중 가장 적었고 3월과 9월에 각각 975개, 863개로 연중 가장 많은 유생을 보유하였다. 50%가 성숙하는 군성숙체장은 각고 13.95 mm였으며, 각고 15mm 이상은 모든 개체가 성숙하고 보육낭을 형성하였다.

• 한국근적외분광분석학회:학술대회논문집
• /
• 한국근적외분광분석학회 2001년도 NIR-2001
• /
• pp.1510-1510
• /
• 2001

NIRS uses reflectance signals resulting from bending and stretching vibrations in chemical bonds between carbon, nitrogen, hydrogen, sulfur and oxygen. These reflectance signals are used to measure the concentration of major chemical composition and other descriptors of homogenized and freeze-dried whole broiler carcasses. Six strains of chicken were analyzed and the NIRS model predictions compared to reference data. The results of this comparison indicate that NIRS is a rapid tool for predicting dry matter (DM), fat, crude protein (CP) and ash content in the broiler carcass. Males and females of six commercial strain crosses of broiler chicken (Gallus domesticus) were used in this study (6$\times$2 factorial design). Each strain was grown to 16 weeks of age, and duplicate serial samples were taken for body composition analysis. Each whole carcass was pressure-cooked, homogenized, and a representative sample was freeze-dried. Body composition determined as follows: DM by oven dried method at 105$^{\circ}C$ for 3 hours, fat by Mojonnier diethyl ether extraction, CP by measuring nitrogen content using an auto-analyzer with Kjeldhal digest and ash by combustion in a muffle furnace for 24 hour at 55$0^{\circ}C$. These homogenized and freeze-dried carcass samples were then scanned with a Foss NIR Systems 6500 visible-NIR spectrophotometer (400-2500nm) (Foss NIR Systems, Silver Spring, MD., US) using Infra-Soft-International, ISI, WinISl software (ISI, Port Matilda, US). The NIRS spectra were analyzed using principal component (PC) analysis. This data was corrected for scatter using standard normal “Variate” and “Detrend” technique. The accuracy of the NIRS calibration equations developed using Partial Least Squares (PLS) for predicting major chemical composition and carcass descriptors- such as body mass (BM), bird dry matter and moisture content was tested using cross validation. Discrimination analysis was also used for sex and strain identification. According to Dr John Shenk, the creator of the ISI software, the calibration equations with the correlation coefficient, $R^2$, between reference data and NIRS predicted results of above 0.90 is excellent and between 0.70 to 0.89 is a good quantifying guideline. The excellent calibration equations for DM ($R^2$= 0.99), fat (0.98) and CP (0.92) and a good quantifying guideline equation for ash (0.80) were developed in this study. The results of cross validation statistics for carcass descriptors, body composition using reference methods, inter-correlation between carcass descriptors and NIRS calibration, and the results of discrimination analysis for sex and strain identification will also be presented in the poster. The NIRS predicted daily gain and calculated daily gain from this experiment, and true daily gain (using data from another experiment with closely related broiler chicken from each of the six strains) will also be discussed in the paper.

• Asian-Australasian Journal of Animal Sciences
• /
• 제18권2호
• /
• pp.151-157
• /
• 2005

Sheep production is affected by genetic and non-genetic factors. A knowledge of these factors is essential for efficient management and for the accurate estimation of breeding values. The objective of this study was to establish the non-genetic factors which affect birth weight and weaning weight in Dorper, Mutton Merino and indigenous Sabi sheep breeds. A total of 2,625 birth and weaning weight records from Grasslands Research Station collected from 1991 through 1993, were used. The records were collected from indigenous Sabi (939), Dorper (807) and Mutton Merino (898) sheep. A mixed classification model containing the fixed effects of year, birth status and sex was used for identification of non-genetic factors. Sire within breed was included as a random effect. Two factor interactions and three factor interactions were important in indigenous Sabi, Mutton Merino and Dorper sheep. The mean birth weights were 4.37${\pm}$0.04 kg, 4.62${\pm}$0.04 kg and 3.29${\pm}$0.04 kg for Mutton Merino, Dorper and Sabi sheep, respectively. Sire had significant effects (p<0.05) on birth weight in Mutton Merino and indigenous Sabi sheep. Year of lambing had significant effects (p<0.05) on birth weight in indigenous Sabi, Mutton Merino and Dorper sheep. The effect of birth status was non significant in Dorper and Mutton Merino sheep while effect of birth status was significant on birth weight in indigenous Sabi sheep. In Indigenous Sabi sheep lambs born as singles (3.30${\pm}$0.05 kg) were 0.23 kg heavier than twins (3.07${\pm}$0.05 kg), in Mutton Merino lambs born as singles (3.99${\pm}$0.08 kg) were 0.07 kg heavier than twins (3.92${\pm}$0.08 kg) and in Dorper lambs born as singles (4.41${\pm}$0.04 kg) were 0.02 kg heavier than twins (4.39${\pm}$0.04 kg). On average males were heavier than females (p<0.05) weighing (3.32${\pm}$0.04 kg vs. 3.05${\pm}$0.07 kg) in indigenous Sabi, 4.73${\pm}$0.03 kg vs. 4.08${\pm}$0.05 in Dorper and 4.26${\pm}$0.07 kg vs. 3.66${\pm}$0.09 kg in Mutton Merino sheep. Two way factor interactions of sire*year, year*sex and sex*birth status had significant effects (p<0.05) on birth weight in indigenous Sabi, Mutton Merino and Dorper sheep while the effect of year*birth status was non significant on birth weight in Indigenous Sabi sheep. The three way factor interaction of year*sex*birth status had a significant effect (p<0.01) on birth weight in indigenous Sabi and Mutton Merino. Tupping weight fitted as a covariate had significant effects (p<0.001) on birth weight in indigenous Sabi, Mutton Merino and Dorper sheep. The mean weaning weights were 17.94${\pm}$0.31 kg, 18.19${\pm}$0.28 kg and 14.39${\pm}$0.28 kg for Mutton Merino, Dorper and Indigenous Sabi sheep, respectively. Effects of sire and sire*year were non significant on weaning weight in Dorper and Mutton Merino while year, sex and sex*year interaction had significant effects (p<0.001) on weaning weight. On average males were heavier than females (p<0.001) at weaning. The respective weaning weights were 18.05${\pm}$0.46 kg, 18.68${\pm}$0.19 kg, 14.14${\pm}$0.15 kg for males and 16.64${\pm}$0.60 kg, 16.41${\pm}$0.31 kg, 12.64${\pm}$0.32 kg for females in Mutton Merino, Dorper and Indigenous Sabi sheep. Lambs born as singles were significantly heavier at weaning than twins, 0.05 kg, 0.06 kg and 0.78 kg for Mutton Merino, Dorper and Indigenous Sabi sheep, respectively. Effect of tupping weight was highly significant on weaning weight. The three way factor interaction year*sex*birth status had a significant effect (p<0.01) on weaning weight. Correction for environmental effects is necessary to increase accuracy of direct selection for birth weight and weaning weight.