• 천문학회보
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• 제38권2호
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• pp.66.2-66.2
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• 2013

As part of the DIGIT key program, we observed GSS30-IRS1, a Class I object located in Ophiuchus (d=125 pc), with Herschel-PACS. More than 70 lines were detected in 50-200 micron band including CO, OH, H2O, and [OI]. All lines, except for [OI], were detected only at the central spaxel of $9.4^{{\prime}{\prime}}{\times}9.4^{{\prime}{\prime}}$ while the [OI] emission is extended along the NE-SW direction. One interesting feature in GSS30-IRS1 is that the continuum is extended beyond PSF, unlike line emission. It suggests that the external heating is important in GSS30-IRS1. For detail analysis of line fluxes, we apply the non-LTE LVG model, RADEX as well as simple rotational diagrams. We also use the Monte Carlo radiative transfer package, RADMC-3D to understand the heating mechanism of dust grains around GSS30-IRS1. We will discuss about heating and cooling processes associated with GSS30-IRS1.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.84-89
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• 2023

Recently, the sixth generation (6G) networks have become tremendous research topics. Intelligent reflecting surface (IRS) technologies have been envisioned, to increase spectrum and energy efficiency for the fifth generation (5G) mobile networks, towards the sixth generation (6G) communications. In this paper, especially for the strongest channel gain user, we investigate the bit-error rate (BER) of non-orthogonal multiple access (NOMA) systems with intelligent reflecting surface (IRS). First, we derive a BER expression in a closed-form of Q functions. Second, we investigate the BER performance improvement of IRS NOMA systems over NOMA systems versus the power allocation. Moreover, we analyze the BER performance improvement of IRS NOMA systems over NOMA systems versus the number of IRS devices. In results, NOMA equipped with IRS technologies could play an important role in the paradigm shift from 5G mobile networks to 6G mobile networks.

• 대한지역사회영양학회지
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• 제6권1호
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• pp.97-107
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• 2001

The clustering of insulin resistance with hypertension, glucose intolerance, hyperinsulinemia, increased triglyceride and decreased HDL cholesterol levels, and central and overall obesity has been called syndrome X, or the insulin resistance syndrome(IRS). To develop a nutrition service for IRS, this study was performed to evaluate the prevalence of each component of the metabolic abnormalities of IRS and analyze the clustering pattern of IRS among subjects living in the Taegu community. Participants in this study were 9234(mean age ; M/F 48/40yrs);63.5% were men, 24.4% were obese, 13.3% had hypertension. 3.7% had hyperglycemia, and 32.4% had hyperlipidemia. The IRS was defined as the coexistence of two or more components among metabolic abnormalities; obesity, hypertension. hyperglucemia and hyperlipidemia. The prevalence of IRS in Taegu was 19.2%(M/F:20.8%/16.4%), the clustering of these fisk variables was higher in advanced age group. Among the subjects of IRS having two of more diseases, 75.6% were obese, the pattern were similar in men and women. The younger, the higher the prevalence of obesity associated clustering patterns. The prevalence of obesity associated patterns among the hyperglycemia associated clustering patterns was 44.5%. The samples of the representative clustering patterns were obesity and hyperlipidemia (8.0%), hypertension and hyperlipidemia(3.2%), hypertension, obesity and hyperlipiemia(3.1%), hypertension and obesity(2.3%), and hyperglycemia and hyperlipidemia(0.8%). The clustering of obesity and hyperlipidemia until 50 year old groups, and the clustering of hypertension and hyperlipidemia in the 60 and 70 age groups were the most prevalent. We concluded that insulin resistance syndrome was a relatively common disorder in the Taegu community, and prevalence and the characteristics of the intervention strategies for IRS are desired, an effective improvement will be achieved.

• 대한공간정보학회지
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• 제7권1호
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• pp.87-95
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• 1999

본 연구에서는 고 해상력의 IRS-1C PAN 데이터와 다중 관측파장대를 갖고 있는 Landsat TM 데이터를 PCA(principal component analysis) 기법으로 중합하고, 중합화상을 이용하여 토지이용분류를 수행, TM 원화상과 분류정확도를 비교 분석하고자 하였다. 분류결과를 평가하기 위해서 10개의 분류항목으로 구성된 sample data를 생성시켰으며, 생성된 sample data의 전체정확도(overall accuracy)로서 분류결과를 평가하였다. 그 결과 여러 밴드를 사용할 수 있다는 이점을 가진 PCA기법으로 Landsat TM 데이터와 IRS-1C PAN 데이터를 중합하여 토지이용분류를 수행할 경우, IRS-1C PAN데이터와 TM13457의 중합화상에서 95.1%로 분류정확도가 가장 높았으며, 특히 TM123457 또는 TM 13457의 중합화상의 경우 TM원화상보다 분류정확도가 가장 크게 향상(6.2%)되었다. 또한 토지이용분류에 있어서 중합칼라합성화상이 TM 원화상 보다 전체적으로 약 5.16%의 정확도 향상을 가져왔다.

• Animal cells and systems
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• 제13권2호
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• pp.127-132
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• 2009

We have examined the hypothesis that the Gly972Arg variant of the insulin receptor substrate 1 (IRS1) gene is associated with the components contributing to overweight (obesity) and metabolic syndrome. We describe IRS1 genotype frequencies in 274 Korean men. The frequencies of Gly972Gly (GIG) and Gly972Arg (G/A variant) of the IRS1 gene were 88.3% and 11.7%, respectively, and the differences in frequencies between the overweight (BMI$\geq$25kg/m$^2$) group and non-overweight (BMI<25kg/m$^2$) group were statistically significant. The subjects with G/A variant of IRS1 gene in non-overweight had significantly higher level of visceral fat thickness and adiponectin/leptin ratio than those with GIG alleles. In overweight group, the subjects with G/A variant of IRS1 gene also showed significantly higher level of insulin than those with GIG alleles. These results suggest that the IRS1 genetic polymorphism is involved in the occurrence of overweight, as well as metabolic syndrome.

• 한국측량학회지
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• 제16권2호
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• pp.187-194
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• 1998

본 연구에서는 높은 해상력의 IRS-1C PAN 데이터와 다양한 관측파장대를 갖고 있는 Landsat TM 데이터를 사용하여, 화상중합방법의 대표적 방법인 IHS방법으로 중합화상을 작성하고, IHS중합화상 및 원화상을 이용하여 토지이용분류를 수행하는데 있어서 어떤 칼라합성밴드가 유효한지를 밝히는데 그 목적이 있다. 분류결과를 평가하기 위해서 10개의 분류항목으로 구성된 sample data를 생성시켰으며, 생성된 sample data의 전체정확도(overall accuracy)로서 분류결과를 평가하였다. 그 결과 Landsat TM 데이터와 IRS-1C PAN데이터를 IHS방법으로 중합하여 토지이용분류를 수행할 경우, TM4, TM5 및 TM7의 적외선영역(infrared spectral region)의 밴드 중 2개 밴드를 포함시켜 분류를 수행하는 것이 좋았으며, 특히 TM 247 중합화상의 경우 분류정확도가 11.8%로 향상되어 가장 좋은 결과를 나타내었다. 또한 토지이용분류를 수행할 경우 3밴드를 중합하여 사용하는 경우보다 1% 원화상에 IRS-1C PAN화상을 추가하여 사용하는 경우의 정확도가 전체적으로 높았다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2022년도 춘계학술발표대회
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• pp.719-719
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• 2022

• 한국안전학회지
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• 제21권3호
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• pp.59-66
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• 2006

Injury Ratio Survey Regulations(IRS) was introduced to the construction industry in the Republic of Korea since 1992 and brought positive effect on occupational accidents reduction. There were tremendous decrease of injury ratios and enforcing of contractors' safety organizations from the beginning of IRS. In spite of these positive results, there were some negative effects such as contractors' shrinking injury reports to keep good injury ratios since these figures had a great impact on pre-qualification stage of bidding when general contractors were competing for new construction projects. Thus, this study aims to devote on lessening construction injury and elimination of above negative impacts through the quantitative statistic analysis of the effectiveness on the occupational accidents prevention of IRS. According to this assessment, there were decrease of from 6.37% to 44.34% in the accident ratios compared to those of non-IRS groups and decrease of from 3.32% to 83.51 % in the accident ratios compared to those of general industry including the unreported accidents.

• 천문학회보
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• 제41권2호
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• pp.54.3-55
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• 2016

We model the spectral energy distribution (SED) of the Class 0 protostar L1527 IRS using a dust continuum radiative transfer code RADMC-3D to study the initial condition of gravitational collapse. To constrain the envelope structure, we use the data obtained by Herschel /PACS, which covers the far-infrared regime ($55-190{\mu}m$) where the SED of L1527 IRS peaks. According to our modeling, a more flattened density profile fits the far-infrared SED of L1527 IRS better than the density profile of a rotating and infalling envelope. Thus, we employ the density structure of a Bonnor-Ebert sphere, which consists of the inner flat-topped and the outer power-law regions and is often used for describing the density structure of the youngest sources in the low mass star formation process. A Bonnor-Ebert sphere fits very well the observed SED at ${\lambda}$ > $10{\mu}m$, suggesting that L1527 IRS might collapse from an unstable Bonnor-Ebert sphere rather than a singular isothermal sphere.

• 약학회지
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• 제52권3호
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• pp.182-187
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• 2008

Salicylate (SA) was shown to alleviate insulin resistance. Here, we showed that SA inhibited Ser731 phosphorylation of insulin receptor substrate 1 (IRS1) and S6 kinase activation, and enhanced tyrosine phosphorylation of IRS1 in response to insulin or amino acid. Experiments using a cJun N-terminal kinase (JNK)-deficient cell and an IRS1 JNK-binding mutant showed that JNK is not required for Ser731 phosphorylation. A two-week treatment of obese mice with SA resulted in decreased Ser731 phosphorylation and enhanced insulin signaling. These results suggest that SA enhances insulin signaling by inhibiting Ser731 phosphorylation of IRS1.