Studies on the Population Dynamics of the Pine Needle Gall Midge , Thecodiposis japonensis Uchida et Inouye , in the Frontal Zones of its infestation

Buom Young Lee 한국산림과학회 1988 한국산림과학회지 Vol.77 No.1

Comparative studies of the population dynamics of the pine needle gall midge, Thecodiplosis japonensis Uchida et Inouye, were made in four Korean red pine forests located in Chungchongnamdo (province), where the midge appeared recently. the results were summarized as follows 1. After of the pine needle gall midge into a red pine forest, its annual changes in patterns of population density reached peak severity gradationally arid then decreased rapidly to non-injurious level thereafter. And the positive correlation-ship between percentages of current needles infested and the number of adults emerged in unit area was not found within a generation. 2. The midge populations reached to low equilibrium Levels within two or three years after the peak. 3. The survivorship curves of the pine needle gall midge showed a stop-like curves representing low mortality in its larval stage within galls at the both sites increasing in population density and stabilized in low level, but those at the sites that its density began to decrease following peak severity of damage showed much straightened survivorship curves having more constant mortality per unit time-intervals. 4. The survivorship differences relating to the state of infestation progress were evident for newly hatched larvae, larvae in galls and larvae or pupae in the soil. 5. The realized fecundity of female adults among tire potential eggs were ranging from 6.6% to 40.4% in accordance with the infestation progress and also the year surveyed. The major mortality in this stage was possibly influenced by the climatic conditions and the shortage of suitable pine needles for oviposition. 6. For the immature stages of newly hatched larvae in the tree crown, the survivorship trends showed obvious differences ranging from 15% to 85% in mortality between the sites with increasing and decreasing populations. The mortality factors in this stage were unfavorable morphological and physiological conditions of host needles ; they are narrowness and consequent flexibility of the needles and high rate of needle divergence in hatching season. 7. The mortality of larvae within galls were 3.4% at the minimum and 88.7% at the maximum, which reflected much heavier mortality at the sites just after peak severity of damage. Most of the mortality occured in this larval feeding period in galls was induced by the early withering of shoots or of galls themselves. 8. For sites with high population levels, intr.aspecific competition for food were recognized at the larva. stage in galls. 9. The total mortality for larvae and pupae in soi habitat was increased along with the stage of infestation progressed as 51.3% at site with. increasing population, 67.8 to 82.5 at site; with decreasing one and 80.7% to 88.7% at stabilized sites respectively. 10. The mortality of overwintering larvae in soi: until late March were higher at the site where follows peak severity as 34.2% to 55.8% in comparison with the figure of 30.9% and 24.8% to 39.0% at sites with increasing and stabilized population respectively. 11. The periodic mortality of larvae and pupae in soil since early April was 29.5% to 37.5% at increasing sites, 35.3% to 60.0% at decreasing sites and 67.3 to 85.3% at stabilized sites. These differences during this period were caused mainly by its parasites. 12. Female/male sex ratio of adults collected in emergence traps varied along with different sites and were correlated with population density. 13. Parasitization by Platygaster matsutama was high at decreasing and stabilized population sites, but that by Inostemma seoulis was negligible at all sites, and coincidental parasite species with host had high parasitism. The density increasing of parasite had delayed-density dependent process following the peak density of the host. 14. The parasites have probably weak functional response in host searching behavior and consequently their realized fecundity was very low. 15. The species composition and dive

SURVIVORSHIP AND OTHER FACTORS RELATING TO POPULATION FLUCTUATION OF THE PINE GALL MIDGE Thecodiplosis japonensis

Buom Young Lee 한국산림과학회 1985 한국산림과학회지 Vol.71 No.1

Comparative studies of the population dynamics of the pine gall midge, Thecodiplosis japonensis, were made in four Japanese red pine forests having different initial infestation year respectively. Survivorship curves developed from these studies indicate that most gall midge mortality occurs in three periods of the larval stage: 1) in newly hatched larvae, prior to gall formation, 2) in young larvae, after the: galls have formed, and 3) in mature larvae that have dropped to the soil. At sites where midge populations were decreasing following a period of severe damage, mortality rates were much higher in all developmental stages than at sites with increasing populations. Examples of density dependent mortality which can combine `to suppress populations or stabilize them are: mortality of newly hatched larvae induced by physiological changes of needles resulting from severe midge damage; larval mortality resulting from early gall withering; and mortality caused by Platygaster matsutama, a parasite that attacks the midge larvae very early but kills them after they have dropped to the soil.

백강균을 처리한 소나무림의 낙엽과 토양에 서식하는 무척주동물 군집에 대한 다변량분석

이범영(Buom Young Lee),신상철(Sang Chul Shin),박영석(Young Seuk Park),권태성(Tae Sung Kwon) 한국산림과학회 2001 한국산림과학회지 Vol.90 No.5

We tested if the treatment of Beauveria bassiana would influence invertebrate communities in litter and soils by multivariate analysis. The PCA (principal components analysis) was used for the analysis. Using the distances between communities in the ordination space, we carried out statistical tests whether any factors would influence structures of the communities. We did not found any significant effects of the Beauveria treatment on invertebrate communities in both litter and soils.

Endurance Capacity of the Biceps Brachii Muscle Using the High-to-Low Ratio between Two Signal Spectral Moments of Surface EMG Signals during Isotonic Contractions

Lee, Sang-Sik,Jang, Jee-Hun,Cho, Chang-Ok,Kim, Dong-Jun,Moon, Gun-Pil,Kim, Buom,Choi, Ahn-Ryul,Lee, Ki-Young The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.8 No.1

Many researchers had examined the validity of using the high-to-low ratio between two fixed frequency band amplitudes (H/L-FFB) from the surface electromyography of a face and body as the first spectral index to assess muscle fatigue. Despite these studies, the disadvantage of this index is the lack of a criterion for choosing the optimal border frequency. We tested the potential of using the high-to-low ratio between two signal spectral moments (H/L-SSM), without fixed border frequencies, to evaluate muscle fatigue and predict endurance time ($T_{end}$), which was determined when the subject was exhausted and could no longer follow the fixed contraction cycle. Ten healthy participants performed five sets of voluntary isotonic contractions until they could only produce 10% and 20% of their maximum voluntary contraction (MVC). The $T_{end}$ values for all participants were $138{\pm}35s$ at 10% MVC and $69{\pm}20s$ at 20% MVC. Changes in conventional spectral indices, such as the mean power frequency (MPF), Dimitrov spectral index (DSI), H/L-FFB, and H/L-SSM, were extracted from surface EMG signals and were monitored using the initial slope computed every 10% of $T_{end}$ as a statistical indicator and compared as a predictor of $T_{end}$. Significant correlations were found between $T_{end}$ and the initial H/L-SSM slope as computed over 30% of $T_{end}$. In conclusion, initial H/L-SSM slope can be used to describe changes in the spectral content of surface EMG signals and can be employed as a good predictor of $T_{end}$ compared to that of conventional spectral indices.

상업스포츠센터 종사원의 서비스품질과 커뮤니케이션이 갈등, 관계결속, 관계해지의도 및 관계지속의도에 미치는 영향

이영훈(Lee, Young-Hoon),정정희(Jung, Jung-Hee),김범(Kim, Buom) 한국사회체육학회 2018 한국사회체육학회지 Vol.0 No.73

The purpose of this research is to empirically analyze the influence (relationship) of commercial sports center employees’ service quality & communication on conflict, relationship commitment and dissolution intention & continuity intention through structural equation model analysis. For this purpose, the study set 238 members at the five commercial sports centers located in Cheonan as the research subjects. In an effort to verify the proposed structural model, the study used IBM SPSSWIN Ver. 21.0 and AMOS 18.0. As a result, first, the results showed that service quality didn’t have a positive effect on conflict. Second, it was found that service quality had a positive effect on relationship commitment. Third, the results showed that communication didn’t have a positive effect on conflict. Fourth, communication was found to have a positive effect on relationship commitment. Fifth, the results showed that conflict didn’t have a positive effect on relationship commitment. Sixth, the results showed that relationship commitment didn’t have a positive effect on dissolution intention. Seventh, relationship commitment was found to have a positive effect on continuity intention.

Stage-specific effects of glutathione, hypoxanthine and cadmium on preimplantation embryo development between mouse strains

류범용 ( Buom Yong Ryu ),( Myung Geol Pang ),( Byeong Jun Jung ),( Chang Suk Suh ),( Seok Hyun Kim ),( Young Min Choi ),( Jung Gu Kim ),( Shin Yong Moon ),( Jin Yong Lee ) 대한산부인과학회 1998 대한산부인과학회 학술대회 Vol.82 No.-

Technology Development of the Embryo Transfer and Production of Nuclear Transfer Embryo in Flower Deer and Elk

Jang-Hee Lee,Soon-Hwa Baek,Joo-Hyung Lee,Buom-Yong Ryu,Ki-Joong Kim,Yong-Hee Kim,Seong-Jae Park,Tai-Young Hur,Yeong-Hoon Jeong,Chang-Yong Choe,Ho-Sup Shim 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1

Artificial insemination and embryo transfer is one of the most important factors affecting to the production of fawn from deer nuclear transfer in the field of deer farms. This study* was conducted to establish the production technology of nuclear transfered embryo in deer. For estrus synchronization or superovulation tretments in flower deer and elk, each 10 does were inserted into the vagina for 14 days with CIDR (Pfizer New Zealand Ltd., NZ) for elk and Ring-CIDR (Bioculture Co., Ltd., Korea) for flower deer, and then those inserted devices were removed. The estrus synchronization of each 6 does were induced by the intramuscular injection of PGF2α (25 mg/head) and PG600 (hCG 200IU + PMSG 400IU, Intevet, Holland). Then, the superovulation of each 4 does of flower deer and elk was induced by additional injection of FSH (200 mg/ head) twice with an interval of 24 hours , respectively. Follicular oocytes were collected from each 2 does superovulated after 48 hours since the injection of PG600 and FSH. In the meantime, the ovarian response and the number of the collected ovarian follicles were investigated with the surgical operations. As a result, the average number of the collected ovarian follicles were 8.5 and 9.0 in flower deer and elk, respectively. The ovarian follicles collected from each two does were cultured in vitro for 48 hours with m-DMEM medium, and then the cell fusion was carried out after the nuclear transfer by the antler cell. As a result, 5 out of 18 ovarian follicles collected from 2 elk does were reached on the MII stage, but there was no generation resulting from the nuclear transferred embryos by the antler cell after enucleation. In 2 flower does, 7 out of 17 ovarian follicles were reached to the MII stage, but one of them was developed to parthenogenetic embryo as well despite a case of fusion from the nuclear transferred embryo. Embryos were collected in a surgical way on the 7th day after artificial insemination, numbers of average embryos collected were 2.5 and 3.0 in each 2 flower deer and elk does superovulated, respectively. The collected two embryos were transplanted to each 2 does synchronized. As a result, a head of fawn was produced from only one elk doe, where as a head of fawn were delivered from one out of 4 elk does artificial inseminated. Given these findings, we consider that more or less of problems might have occurred in vitro culture system of ovarian follicles in the production of nuclear transfered deer embryos. In addition, the greatest reason why both the aetificial insemination and embryo transfer failed was considered attributable to stress due to anesthesia and catching.

Endurance Capacity of the Biceps Brachii Muscle Using the High-to-Low Ratio between Two Signal Spectral Moments of Surface EMG Signals during Isotonic Contractions

Sang-Sik Lee,Jee-Hun Jang,Chang-Ok Cho,Dong-Jun Kim,Gun-Pil Moon,Buom Kim,Ahn-Ryul Choi,Ki-Young Lee 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.4

Many researchers had examined the validity of using the high-to-low ratio between two fixed frequency band amplitudes (H/L-FFB) from the surface electromyography of a face and body as the first spectral index to assess muscle fatigue. Despite these studies, the disadvantage of this index is the lack of a criterion for choosing the optimal border frequency. We tested the potential of using the high-to-low ratio between two signal spectral moments (H/L-SSM), without fixed border frequencies, to evaluate muscle fatigue and predict endurance time (Tend), which was determined when the subject was exhausted and could no longer follow the fixed contraction cycle. Ten healthy participants performed five sets of voluntary isotonic contractions until they could only produce 10% and 20% of their maximum voluntary contraction (MVC). The Tend values for all participants were 138 ± 35 s at 10% MVC and 69 ± 20 s at 20% MVC. Changes in conventional spectral indices, such as the mean power frequency (MPF), Dimitrov spectral index (DSI), H/L-FFB, and H/L-SSM, were extracted from surface EMG signals and were monitored using the initial slope computed every 10% of Tend as a statistical indicator and compared as a predictor of Tend. Significant correlations were found between Tend and the initial H/L-SSM slope as computed over 30% of Tend. In conclusion, initial H/L-SSM slope can be used to describe changes in the spectral content of surface EMG signals and can be employed as a good predictor of Tend compared to that of conventional spectral indices.

미수정 및 저수정율의 기왕력이 있는 체외수정시술 환자에서의 난자 세포질내 정자 주입술 : 중증 남성인자 환자와의 비교

문신용(Shin Yong Moon),최영민(Young Min Choi),김석현(Seok Hyun Kim),오선경(Sun Kyung Oh),서창석(Chang Suk Suh),이진용(Jin Yong Lee),정병준(Byeong Jun Jung),김희선(Hee Sun Kim),류범용(Buom Yong Ryu),방명걸(Myung Geol Pang),김정구(Jung 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.2

N/A Objective: The purpose of this study was to determine whether intracytoplasmic sperm injection(ICSI) could overcome the defects of oocytes in IVF-ET patients with previous fertilization failure by conventional fertilization technique. Design: Retrospective study Materials and Methods: A total of 119 ICSI cycles in 57 IVF-ET patients performed from May, 1995 to December, 1997 was enrolled. Subjects were divided into two groups: FR group included 66 ICSI cycles in 35 patients with normal sperm who underwent ICSI due to past history of failed or poor fertilization in the previous IVF-ET cycles, and OAT group included 53 ICSI cycles in 22 patients with severe oligoasthenoterato- zoospermia(OAT) which was defined as sperm concentration < 20 million/ml, mo#dlity < 30% and normal morphology < 4% by strict morphologic criteria. The outcomes of ICSI were analyzed and compared in both groups. Results: The age of female patients, basal serum FSH level, and the numbers of oocytes retrieved and metaphase II oocytes were all comparable in both groups. The fertilization rate after ICSI was similar in both groups(68.7+-25.3% vs. 67.7+-24.5%), as were the cleavage rate of normally fertilized oocytes(93.1+-21.4% vs. 89.3+-21.6%), the number of embryos transferred(4,00+-1.98 vs. 4.64+-2.10), and cumulative embryo score(CES) indicating the quality of embryos(47.3+-33.2 vs. 54.1+-33.2). The implantation rate(4.3+-10.5% vs. 3.8+-11.0%) and the clinical pregnancy rate per cycle(15.2% vs. 13.2%) were also comparable in both groups. Conclusions: Although it has been shown that there is a higher risk of chromosomal abnormalities in oocytes from IVF-ET patients with pevious failed or poor fertilization, higher implantation and clinical pregnancy rates wer#e not observed in patients with OAT following ICSL Therefore, the functional defect of sperm such as loss of capacitation, defect of aaasome reaction, and abnormality of nucleus decondensation should be also considered in patients with previous failed or poor fertilization.

인간 정자의 정밀 형태 분석에 관한 연구

문신용(Shin Yong Moon),최영민(Young Min Choi),김석현(Seok Hyun Kim),오선경(Sun Kyung Oh),서창석(Chang Suk Suh),이진용(Jin Yong Lee),권재희(Jae Hee Kwon),지병철(Byeong Chul Jee),정병준(Byeong Jun Jung),김희선(Hee Sun Kim),류범용(Buom 대한산부인과학회 1998 Obstetrics & Gynecology Science Vol.41 No.12

N/A The proportion of male factor infertility due to quantitative and qualitative sperm disorders is approximately 50-60% in infertile couples. In IVF-ET, lower or failed fertilization of oocytes usually results from subnormal count of total motile sperms, but this may occur in infertile couples even with normal sperm count. It has been suggested that some functional defects in sperms are responsible for lower or failed fertilization. Routine semen analysis based on numerical background has limits for the assessment of fertilization capacity of sperm in infertile males, and the andrologic test for the prediction of fertilization capacity must be objective, repeatable, quick, economic, and easily applicable for the clinical settings. The purposes of this study were to develop the analysis method of strict morphology of sperm using the strict criteria as a simple, inexpensive and useful test of sperm fertilization capacity, to establish the normal fertile range and the cut-off value of strict morphology, and to evaluate the validity of strict morphology as a prognostic indicator of fertilization capacity in IVF-ET. In establishing the effectiveness of strict morphology of sperm, ROC curve was used. Among the various thresholds for the prediction of fertilizing ability, normal morphologic value 10.0 corresponding to the value with higher sensitivity and lesser false positive rates was determined as a cut-off value. Using this cut-off point, the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of strict morphology for the prediction of fertilization capacity was 73.9%, 81.0%, 80.6%, and 72.7%, respectively. To evaluate the clinical validity of strict morphology as a prognostic indicator of fertilization capacity, this cut-off point was applied to 133 patients undergoing IVF-ET. For the prediction of fertilization rate >30% in IVF-ET, the sensitivity, specificity, PPV, and NPV was 77.3%, 77.8%, 87.2%, and 63.6%, respectively. In conclusion, the strict morphology of sperm is one of the most simple and useful test for the assessment of fertilization capacity of sperm and the prediction of IVF-ET outcomes in infertile couples.