비수도권 대졸 청년의 취업 및 수도권 유출 결정요인- 부모 소득과 노동시장 성과를 중심으로 -

MINGSHENG CHANG,문영만 한국아시아학회 2024 아시아연구 Vol.27 No.1

This study analyzed the factors determining employment and migration to metropolitan areas among college graduates in non-metropolitan areas using data from the 5-year period of the Korean Labor Institute's Graduate Occupational Mobility Survey (GOMS). Firstly, the results of regression analysis estimating the determinants of employment for college graduates in non-metropolitan areas showed that the higher the parental income and assets at the time of university admission, the significantly higher the employment rate of their children.The influence on employment was greater in large corporations and high-paying companies, which young people prefer, rather than in all enterprises (quantitative effect). Secondly, the first outflow for non-metropolitan youth's university enrollment showed a high outflow to metropolitan universities in all regions of non-metropolitan areas except for the same region. Thirdly, the estimation of the determinants of outflow to metropolitan universities for non-metropolitan high school graduates through regression analysis showed that the higher the parental income (1.4 times) and assets (1.6 times), and the more specialized high school education (3.1 times), the higher the outflow to metropolitan universities. Fourthly, the rate of return to the region after university graduation for young people who had primary outflows was only 26.3% (Honam region) to 40.3% (Southeast region). Fifthly, the secondary outflow for employment of college graduates in non-metropolitan areas was predominantly to metropolitan companies across all regions.The estimated determinants suggest that the probability of migration to metropolitan companies increases with higher parental income and assets. The influence is particularly pronounced in large corporations and high-paying companies with favorable working conditions. Therefore, to prevent the migration of highly educated graduates from non-metropolitan areas to metropolitan areas, it is essential to not only expand job opportunities but also enhance job quality. Additionally, it is necessary to strengthen public education to avoid the intergenerational transmission of income and asset disparities leading to disparities in children's education and the labor market, and to expand government support for low-income households. 본 연구는 한국고용정보원의 ‘대졸자직업이동경로조사(GOMS)’ 최근 5년간를 이용하여 비수도권 대졸 청년의 취업 및 수도권 유출 결정요인을 분석하였다. 첫째, 회귀분석을 통해 취업에 부모 소득과 자산이 비수도권 대졸 청년의 취업에 미치는 영향을 추정한 결과, 부모 소득과 자산이 높을수록 자녀의 취업률이 유의하게 높았으며, 영향력은 전체기업(양적 효과)보다는 청년들이 선호하는 대기업과 고임금 기업(질적 효과)에서 더 컸다. 둘째, 비수도권 청년의 대학진학을 위한 1차 유출은 비수도권의 모든 권역에서 동일권역을 제외하고는 수도권 대학으로 유출된 비중이 높았다. 셋째, 회귀분석을 통해 비수도권 고교 졸업생들의 수도권 대학 유출 결정요인을 추정한 결과, 부모 소득(1.4배)과 자산(1.6배)이 많을수록, 특목고생일수록(3.1배) 수도권 대학으로 유출이 높았다. 넷째, 1차 유출된 청년의 대학 졸업 후 해당 지역으로 회귀비율은 26.3%(호남권)~40.3%(동남권)에 불과하였다. 다섯째, 비수도권 대졸 청년의 취업을 위한 2차 유출은 모든 권역에서 수도권 기업으로 유출이 가장 많았다. 유출 결정요인을 추정한 결과, 부모 소득과 자산이 많을수록 수도권 기업으로 유출될 확률이 높았다. 영향력은 상대적으로 노동조건이 양호한 대기업과 고임금 기업에서 더 컸다. 따라서 비수도권 고학력 대졸 청년의 수도권 유출을 막기 위해서는 일자리 확대도 중요하지만, 일자리의 질을 높일 필요가 있다. 또한, 부모의 소득 및 자산 격차가 자녀의 학력과 노동시장 격차로 이어지지 않도록 공교육을 강화하고 저소득 가구에 대한 정부차원의 지원을 확대할 필요가 있다.

Output-based Adaptive Iterative Learning Control of Uncertain Linear Systems Applied to a Wafer Stage

Mingsheng Cao,Yumeng Bo,Huibin Gao 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.3

Iterative learning control (ILC) is an efficient technique applicable to improving the tracking performance of systems that have a repetitive nature. In this paper, point-to-point movements with time-iteration-varying disturbances are considered instead. A new output-based adaptive ILC scheme consisting of an adaptive second-order ILC and an iterative learning estimation of time-iteration-varying disturbances is proposed for a class of linear systems with unknown parameters. The proposed algorithm is used to improve trajectory tracking performance without requiring a plant model or a sensitivity function, and without assuming the initial condition to be zero. In order to verify the proposed algorithm, it is applied to a wafer stage, and the obtained tracking performance is compared with that obtained using a traditional second-order ILC algorithm; better results are obtained using the proposed method.

Accelerating the OHLO Learning Using the Conjugate Gradient Method

Mingsheng Zhao,Youshou Wu,Xiaqin Ding 대한전자공학회 1994 ICONIP : International Conference On Neural Inform Vol.3 No.2

The complete mitochondrial genome of Mahanta tanyae compared with other zygaenoid moths (Lepidoptera: Zygaenoidea)

Mingsheng Yang,Hongfei Zhang,Lu Song,Yuxia Shi,Xiaomeng Liu 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2

The complete mitochondrial genome (mitogenome) of Mahanta tanyae was sequenced and extensively compared with all seven additionally reported zygaenoid mitogenomes. The M. tanyae mitogenome is circular, doublestranded, and 15,323 bp long. Gene content, gene order, and orientation are all typical of Lepidoptera, despite the existence of gene rearrangements for some other zygaenoid mitogenomes. Comparative analyses further showed that the incomplete termination codon T is consistently recognized in the mitochondrial cox1, cox2 and nad4 genes of all zygaenoid species, as well as in the nad5 gene in two limacodid species. Among 13 proteincoding genes, nad6 exhibits the highest evolutionary rate. The structure for each tRNA is highly conserved, including loss of the dihydorouidine (DHU) arm in trnS1 (AGN), but remarkable nucleotide variation exists, primarily in the pseudouridine (TψC) loops. Interestingly, in four species of Zygaenidae, the anticodons for trnS1 (AGN) are consistently UCU, instead of the routinely used codon GCU, in all three species of Limacodidae. In the intergenic region between trnS2 and nad1, a short sequence before the motif “ATACTAA” is present in the M. tanyae mitogenome that is unique among reported zygaenoid mitogenomes. In the A + T-rich region between the motif “ATTTA” and the microsatellite (AT) n element, some nucleotides were present for most zygaenoid mitogenomes, which is, to our knowledge, rare even in reported lepidopteran mitogenomes. Phylogenetic analyses based on the combined 37 mitochondrial genes confirmed the position of M. tanyae in Limacodidae of the Zygaenoidea.

FLOURY ENDOSPERM12 Encoding Alanine Aminotransferase 1 Regulates Carbon and Nitrogen Metabolism in Rice

Mingsheng Zhong,Xi Liu,Feng Liu,Yulong Ren,Yunlong Wang,Jianping Zhu,Xuan Teng,Erchao Duan,Fan Wang,Huan Zhang,Mingming Wu,Yuanyuan Hao,Xiaopin Zhu,Ruonan Jing,Xiuping Guo,Ling Jiang,Yihua Wang,Jianmi 한국식물학회 2019 Journal of Plant Biology Vol.62 No.1

Starch is a major storage substance in cerealgrains, and starch biosynthesis is a complex process. In orderto elucidate regulation of the starch biosynthesis pathway, wescreened a series of rice (Oryza sativa L.) endospermmutants. In this study, we identified a floury white-coreendosperm mutant named floury endosperm12 (flo12). Theflo12 mutant exhibited loosely packed starch granules and alower thousand kernel weight compared to wild type. Semithinsections revealed that compound starch grains (SG) inflo12 interior endosperm cells were developed abnormally. Furthermore, amylose content was decreased, while totalprotein content was significantly increased in flo12 grains. Map-based cloning showed that FLO12 encodes rice alanineaminotransferase 1 (OsAlaAT1). OsAlaAT1 is highly expressedin developing endosperm. Subcellular localization showedthat OsAlaAT1 is localized in the cytosol. Moreover, theexpression of most starch synthesis-related genes wasdecreased, while most of the storage protein coding geneshad elevated expression levels in the flo12 mutant. Inaddition, overexpression of the OsAlaAT1 gene increasedgrain weight. In brief, we demonstrated that OsAlaAT1regulates carbon and nitrogen metabolism, which provides anew insight for the improvement of rice quality and yield.

Device-to-Device Relay Cooperative Transmission Based on Network Coding

( Jing Wang ),( Mingsheng Ouyang ),( Wei Liang ),( Jun Hou ),( Xiangyang Liu ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.7

Due to the advantages of low transmit power consumption, high spectral efficiency and extended system coverage, Device-to-Device (D2D) communication has drawn explosive attention in wireless communication field. Considering that intra-cell interference caused between cellular signals and D2D signals, in this paper, a network coding-based D2D relay cooperative transmission algorithm is proposed. Under D2D single-hop relay transmission mode, cellular interfering signals can be regarded as useful signals to code with D2D signals at D2D relay node. Using cellular interfering signals and network coded signals, D2D receiver restores the D2D signals to achieve the effect of interference suppression. Theoretical analysis shows that, compared with Amplify-and-forward (AF) mode and Decode-and-forward (DF) mode, the proposed algorithm can dramatically increase the link achievable rate. Furthermore, simulation experiment verifies that by employing the proposed algorithm, the interference signals in D2D communication can be eliminated effectively, and meanwhile the symbol error rate (SER) performance can be improved.

The Effects of Adenoviral Transfection of the Keratinocyte Growth Factor Gene on Epidermal Stem Cells: an In Vitro Study

Xinping Li,Mingsheng Zhang,Ling Liang,Pin Zhao,Kenzo Uchida,Hisatoshi Baba,Hong Huang,Wenfang Bai,Liming Bai 한국분자세포생물학회 2013 Molecules and cells Vol.36 No.4

Epidermal stem cells (ESCs) are characterized as slow-cycling, multi-potent, and self-renewing cells that not only maintain somatic homeostasis but also participate in tissue regeneration and repair. To examine the feasibility of adenoviral vector-mediated keratinocyte growth factor (KGF) gene transfer into in vitro-expanded ESCs, ESCs were isolated from samples of human skin, cultured in vitro, and then transfected with recombinant adenovirus (Ad) carrying the human KGF gene (AdKGF) or green fluorescent protein gene (AdGFP). The effects of KGF gene transfer on cell proliferation, cell cycle arrest, cell surface antigen phenotype, and -catenin expression were investigated. Compared to ESCs transfected with AdGFP, AdKGF-transfected ESCs grew well, maintained a high proliferative capacity in keratinocyte serum-free medium, and expressed high levels of -catenin. AdKGF infection increa-sed the number of ESCs in the G0/G1 phase and promoted ESCs entry into the G2/M phase, but had no effect on cell surface antigen phenotype (CD49f+/CD71-). The results suggest that KGF gene transfer can stimulate ESCs to grow and undergo cell division, which can be applied to enhance cutaneous wound healing.

Three new eyeless Draconarius spiders (Araneae, Amaurobiidae) from limestone caves in Guizhou, southwestern China

Huiming Chen,Mingsheng Zhu,Joo-Pil Kim 한국거미연구소 2008 한국거미 Vol.24 No.2

Three new eyeless species of Draconarius from limestone caves in Guizhou, China, are diagnosed, described and illustrated: Draconarius tortus sp. nov., D. proximus sp. nov. and D. digituliscaput sp. nov.. Both of them are troglobite, with reduced eyes.

Performance characteristics around the TDC of linear compressor based on whole-process simulation

Huiming Zou,Mingsheng Tang,HONGBO XU,SHUANGQUAN SHAO,Changqing Tian 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.10

A whole-process simulation platform is established for linear compressor to analyze the performance characteristics on different pistondisplacement conditions from small oscillation without pumping till to rushing out of the top dead center (TDC). The measuring methodsof the related parameters in the model are presented and the values of these parameters are obtained from an actual test. The simulatedresults agreed well with the experimental results under the same working conditions. The errors of the effective voltage, the effectivecurrent, the compression efficiency and the phase angle between the current and the displacement were within ±6.9%,±8.5%,±6.2%and±13.4%, respectively. Based on this simulation platform, the performance characteristic around the TDC of the linear compressor ondifferent working conditions is analyzed. The performance comparison on 60 Hz shows that the compression efficiency near to the TDCon 0.7 MPa is higher than that on 0.5 MPa because the phase angle α under that condition is around 90°, but the operation reliability on0.7 MPa is worse than that on 0.5 MPa because the jump phenomenon happens when the piston displacement goes near to the TDC. Thejump phenomenon results in unstable operation as the piston displacement jumps from the position before the TDC to the position afterthe TDC. According to the simulation on different power frequency, two important performance characteristics are inferred. One is thatthere is an inflection point in the curve of the phase angle α versus the displacement at the TDC. This characteristic is a good choice forthe TDC detection. The other is that the jump phenomenon is prone to happening when there exist different displacement responses onthe same voltage value, becoming inconspicuous when the power frequency is decreased and disappearing when the power frequency isincreased. Based on this characteristic, the jump phenomenon can be avoided through suitable system configuration and frequency adjustment.

A New Species of Genus Pardosa from China

Chunhua Xu,Mingsheng Zhu,Joo-Pil Kim 한국거미연구소 2010 한국거미 Vol.26 No.1

본 논문을 통해 중국으로부터 별늑대거미 (Pardosa) 속의 신종을 보고한다. 측정은 mm 단위이며 , 모식표본(type)은 중국 Hebei University 박물관(MHBU) 에 소장한다. A new species of genus Pardosa from China is described and illustrated in this paper. AIl measurements given are in mm. Types are deposited in the Museum of Hebei University(MHBU).