Asocial: Adaptive Task Re-Allocation in Distributed Computing Systems with Node Failures

Yanli Shen,Taoshun Xiao,Weiwei Zheng 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09

Task allocation-the problem of efficiently allocating a set of M tasks to a set of N nodes-is a fundamental issue in distributed computing systems (DCSs). The problem is particularly challenging in the presence of fail-prone nodes. In this work, we design an adaptive task (re-)allocation mechanism, named Asocial. The Asocial allows us to optimize the utilization of system resources (including computing resources and network resources) while increasing service-level fault tolerance as well as failure resilience. In addition, we propose a cooperative game model based task (re-)allocation approach for cooperation among Physical Nodes (PNs). We consider both the performance states and reliability levels of candidate PNs when deploying tasks. Specifically, we exploit failure prediction techniques to evaluate PNs’ reliability levels. As a result, we can utilize the resources efficiently and thus improve the service reliability (i.e., the probability of serving all the tasks before their delivery time). We show by means of numerical evaluations that the proposed Asocial can significantly improve service reliability, system availability as well as resource utilization. In particular, by using failure prediction result (F-measure is around 0.8), the application completion rate (ACR), the task completion rate (TCR) and the computing resource utilization (CRU) reach 85.20%, 85.67% and 78.34%, respectively. Compared with 67.30%, 70.07% and 65.79% of the initial allocation scheme, the performance achieves a significant improvement (26.60%, 22.26% and 19.08%, respectively).

The Screening of Fermented Medicinal Herbs to Identify Those with Anti-inflammatory Properties

Shen, Feng-Yan,Ra, Je-Hveon,Kim, Jin-Ju,Jung, Sung-Ki The Society of Internal Korean Medicine 2009 大韓韓方內科學會誌 Vol.30 No.1

Objectives : Consumption of fermented foods has been known to alleviate some of the symptoms of atopy and may limit allergy development, while there are also many medicinal herbs proved to be effective for immunologically-mediated diseases. In this study, we introduced modern zymology to ferment some herbs to see if fermentation has the possibility of increasing the anti-inflammatory effects of medicinal herbs. Interleukin-4 (IL-4) and interferon-gamma $(INF-\gamma)$ have been demonstrated to be the main factors in the pathology of allergic diseases. Methods : We measured the levels of IL-4 and $INF-\gamma$ on concanavalin A-induced BALB/c mice spleen cells, which were subsequently treated with fermented and unfermented herbs. We then compared the fermented groups with unfermented groups to see if the anti-inflammatory effects of the herbs were influenced by fermentation. Results and Conclusions : Our results showed that fermentation had the potential to increase the anti-inflammatory effects of some medicinal herbs, and Astragalus membranaceus and Salvia miltiorrhiza would be the most suitable medicinal herbs for fermentation among the herbs in this study.

Unambiguous Bearing Estimation of Coherent Signals Using Acoustic Vector Sensor

Yan Jing,Yi Shen,Naizhang Feng,Mingjian Sun 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.7

Development of Origanum vulgare Cell Suspension Culture to Produce Polyphenols and the Stimulation Effect of Salicylic Acid Elicitation and Phenylalanine Feeding

Yan-Ping Li,Dao-Bang Tang,Xiao-Qiang Wang,Meng Wang,Qing-Feng Zhang,Yuan Liu,Bei-Yun Shen,Jiguang Chen,Zhongping Yin 한국생물공학회 2021 Biotechnology and Bioprocess Engineering Vol.26 No.3

Three types of calli were induced from Origanum vulgare (O. vulgare) aseptic seedlings, and the friable calli with white appearance and high growth rate were further screened and used to develop cell suspension culture to produce polyphenols. Murashige and Skoog (MS) medium with 3.0 mg/L Kinetin (KT) and 0.5 mg/L 2,4-dichlorophenoxy acetic acid (2,4-D) was suitable for both O. vulgare cells growth and polyphenols accumulation. To further enhance the polyphenols accumulation, O. vulgare cells were treated by phenylalanine (Phe) feeding and salicylic acid (SA) elicitation. Compared with the individual Phe feeding and SA elicitation, SA elicitation combined with Phe feeding showed a much better promotion effect on the polyphenols synthesis in O. vulgare cells, especially rosmarinic acid (RosA) accumulation. With the combined treatment of 200 μM SA and 100 μM Phe, total polyphenols content and yield were 41.36 mg/g and 752.93 mg/L, respectively. RosA content and yield reached 31.25 mg/g and 570.37 mg/L, which were 5.44 and 5.47 times that of the control. Furthermore, the total polyphenols extracted from the cultured cells treated by SA elicitation combined with Phe feeding displayed a much higher antioxidant capacity than that of untreated cells, meanwhile its 1,1-diphenyl-2- trinitrophenyl hydrazine (DPPH) and superoxide anion radical-scavenging activity were much stronger than that of vitamin C. What’s more, our results also showed that RosA was the principal contributor to the fine antioxidant capacity of the total polyphenols extracted from the SA and Phe treated cells. Our research indicated that SA elicitation combined with Phe feeding significantly improved the polyphenols yield and antioxidant capacity of the cultured O. vulgare cells, and therefore has a promising application prospect in natural polyphenols production.

Current treatment outcomes of bile duct cancer: Are we improving?

Yan-Shen SHAN 한국간담췌외과학회 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.-

Transcriptional activation of pref-1 by E2F1 in 3T3 L1 cells

( Yan Nan Shen ),( Yoon Mo Kim ),( Cheol Heui Yun ),( Yang Soo Moon ),( Sang Hoon Kim ) 생화학분자생물학회 2009 BMB Reports Vol.42 No.10

Study on Data Fusion-Based Online Monitoring System for Mechanical Characteristics of Circuit Breaker

Yan Lu,Shen Jian-wei 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.12

To satisfy the requirements of smart power grids for online monitoring intelligent switchgear cabinets, this paper designed an online monitoring system for mechanical characteristics of circuit breaker with the multi-sensor fusion technology, realized the online monitoring of the characteristics including travel, over travel, speed at instant of contacts separating (touching), switch-off (on) time, bounce times, bouncing time and average speed; the results of field and remote tests showed that the developed monitoring device enabled real time and accurate monitoring of mechanical characteristics of circuit breakers.

Vibration Energy Transfer Characteristics of Panels with Multiple Coupling Forms in Satellites

Yan Shen,Yang Xu,Xiaowei Sheng,Song Wan,Xianbo Yin 한국항공우주학회 2023 International Journal of Aeronautical and Space Sc Vol.24 No.5

Micro-vibrations on-board a satellite have degrading effects on the performance of certain payloads like observation cameras. There are numerous sources and extremely complicated transfer paths for micro-vibration in satellites. The vibration energy transfer characteristics of panels with multiple coupling forms in satellites were analyzed, which can guide the vibration isolation measures of satellites. First, the satellite was divided into honeycomb panel subsystems with multiple coupling forms. In the next phase, based on the energy finite element analysis (EFEA), the energy finite element equation of the honeycomb subsystem and the connection matrix at the coupling boundary was established to determine the energy distribution and energy flow characteristics of the multiform coupled honeycomb panels under different excitation frequencies. Finally, the finite difference approximation based on the response obtained from the measurement point array was employed to obtain the energy density. By comparing the results of the experiment and EFEA simulation under different frequency excitations, the average error of the energy density was less than 4 dB, which proved the accuracy of EFEA in the transfer characteristics analysis of the vibration energy of the satellite. The experiment method of vibration transfer based on the finite difference approximation can directly obtain the energy density of the structure.

Thyroid Hormone Reference Intervals among Healthy Individuals In Lanzhou, China

Yan Lu,Wen-Xia Zhang,De-Hong Li,Lian-Hua Wei,Yu-Jun Zhang,Fu-Na Shi,Shen Zhou 대한내분비학회 2023 Endocrinology and metabolism Vol.38 No.3

Background: The common reference intervals (RIs) for thyroid hormones currently used in China are provided by equipment manufacturers. This study aimed to establish thyroid hormone RIs in the population of Lanzhou, a city in the subplateau region of northwest China, and compare them with previous reports and manufacturer-provided values. Methods: In total, 3,123 individuals (1,680 men, 1,443 women) from Lanzhou, an iodine-adequate area of China, perceived ashealthy were selected. The Abbott Architect analyzer was used to determine the serum concentration of thyroid hormones. The 95%RI was estimated using the 2.5th and 97.5th percentiles as the lower and upper reference limits, respectively. Results: The serum levels of thyroid-stimulating hormone (TSH), total triiodothyronine (TT3), antithyroglobulin (ATG) antibody,and antithyroid peroxidase (ATPO) antibody levels were significantly correlated with sex (P<0.05). TSH, total thyroxine (TT4), andATPO levels were significantly correlated with age (P<0.05). The serum levels of TSH, ATG, and ATPO in men were significantlylower than in women; in contrast, the serum TT3 level was significantly higher in men than in women (P<0.05). Serum TSH, TT3,TT4, and ATG levels differed across age groups (P<0.05), but no such variation was observed for ATG levels (P>0.05). The established RIs of TSH, ATG, and ATPO in this study differed between sexes (P<0.05). The thyroid hormone RIs established herein wereinconsistent with the manufacturer-provided values. Conclusion: The RIs of thyroid hormones in the healthy population of Lanzhou were inconsistent with those in the manufacturer’smanual. Validated sex-specific values are required for diagnosing thyroid diseases.

Chlorogenic acid accumulation and related gene expression in peach fruit

Yan Juan,Su Ziwen,Guo Shaolei,Zhang Minghao,Zhang Binbin,Cai Zhixiang,Shen Zhijun,Ma Ruijuan,Yu Mingliang 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.3

To reveal the molecular mechanism in the accumulation of chlorogenic acids (CGAs) in peach (Prunus persica) fruit during growth and development, CGA contents in the flesh of the three peach cultivars ‘Ruiguang 18’, ‘Heiyoutao’, and ‘Beijingyixianhong’ were determined. The expression levels of CGA metabolism-related genes were analyzed based on transcriptome data (RNA-seq). These candidate genes were then screened and real-time fluorescent quantitative PCR (qRT-PCR) was performed to verify their expression. The results showed that the content of total CGAs, 5-O-caffeoylquinic acid and 3-O-caffeoylquinic acid, in the flesh of ‘Ruiguang 18’ exhibited a decreasing trend during fruit development, and there was a great drop at maturity stage (P < 0.05). The three contents in ‘Heiyoutao’ increased first at stage S2 (P < 0.05) and then decreased significantly (P < 0.05). In ‘Beijingyixianhong’, they stayed stable in the early stages, then total CGAs and 3-O-caffeoylquinic acid decreased significantly at the maturity stage (P < 0.05). RNA-seq transcriptome data analysis and qRT-PCR expression analysis showed that the accumulation of CGAs in fruit flesh was mainly affected by the expression of Prupe.3G100800 (PpHCT) and Prupe.3G107300 (Pp4CL), and their expression levels were highly consistent with total CGA content. Thus, we concluded that Prupe.3G100800 (PpHCT) and Prupe.3G107300 (Pp4CL) are the key genes for CGAs synthesis in peach flesh.