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No Battery, No Problem: Challenges and Opportunities in Batteryless Intermittent Networks
Fu, Shen,Narayanan, Vishak,Wymore, Mat,Deep, Vishal,Duwe, Henry,Qiao, Daji 한국통신학회 2023 Journal of communications and networks Vol.25 No.6
The emergence of the Internet of Things (IoT) brings a new paradigm of ubiquitous sensing and computing. Yet as an increasing number of wireless IoT devices are deployed, powering them with batteries becomes expensive and unsustainable. Batteryless systems harvesting energy from the ambient environment offer a promising solution to this problem. However, due to the unpredictability of the ambient energy sources and the relatively weak harvesting strength, these systems may operate intermittently, presenting a series of unique challenges above and beyond the challenges of traditional duty-cycled networks. In this article, we present and discuss the challenges and opportunities in batteryless intermittent networks. We make the case for, and propose, the first formal intermittency-aware network stack. Finally, we present future research directions for batteryless intermittent networks, with the expectation that research of this type can pave the way for batteryless intermittent networks as the next generation of ubiquitous IoT devices.
심복실(Shen Fu-Shi) 한복문화학회 2006 韓服文化 Vol.9 No.1
This study examined the life style of Korean-Chinese College in YanBian region of China.<br/> The major purposes of this dissertation are as follows:<br/> 1. to analyze the life styles of Korean-chinese and group them according to different life styles;<br/> 2. to investigate demographic characteristics among the groups of different life styles of Korean-Chinese.<br/> The sample consisted of 296 undergraduate students of the Yanbian University in China. The questionnaires were used to collect the data and the data were analyzed by Factor Analysis, Cluster Analysis, x² test, and Anova analysis.<br/> The major results were as follows :<br/> 1. Results of factor analysis showed that life styles of the respondents could be classified into 5 factors: the ostentatious sense factor, positive activity factor, circumspective economy factor, self-repletion factor and information conformity factor.<br/> 2. The respondents were divided into five groups according to the life styles; active consumer group, ostentatious simple consumer group, planned consumer group, self-orientation consumer group and ostentatious planned consumer group.<br/> 3. Gender, major, income and allowance were not significantly different among the groups. But, there were more one-child respondents in the ostentatious planned group, while planned consumer group had more respondents who were not one-child in their families.
( Lin Fu ),( Yannan Ou ),( Zongzhuan Shen ),( Beibei Wang ),( Rong Li ),( Qirong Shen ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.10
Banana planting altered microbial communities and induced the enrichment of Fusarium oxysporum in rhizosphere compared with that of forest soil. Diseased plant rhizosphere soil (WR) harbored increased pathogen abundance and showed distinct microbial structures from healthy plant rhizosphere soil (HR). The enriched taxon of Bordetella and key taxon of Chaetomium together with some other taxa showed negative associations with pathogen in HR, indicating their importance in pathogen inhibition. Furthermore, a more stable microbiota was observed in HR than in WR. Taken together, the lower pathogen abundance, specific beneficial microbial taxa and stable microbiota contributed to disease suppression.
Eclosion hormone functions in larva-pupa-adult ecdysis in Leptinotarsa decemlineata
Shen Chen-Hui,Jin Lin,Fu Kai-Yun,Guo Wen-Chao,Li Guo-Qing 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
In Drosophila melanogaster, ecdysis-triggering hormone (ETH) and eclosion hormone (EH) mutually enhance the release of each other through a positive feedback loop. Both are involved in the stimulation of ecdysis behavior series and molting-related physiological preparations. However, whether 20-hydroxyecdysone (20E) controls eh expression and whether EH plays a similar role in non-Drosophilid insects remain to be determined. In Lep tinotarsa decemlineata, we found that Ldeh mRNA levels were high in the early and/or late stages and low in the intermediate period within each larval instar, indicating that the mRNA peaks positively correlate with 20E pulses. Consistent with the indication, we confirmed that 20E signaling stimulated the transcription of Ldeh. RNA interference (RNAi)-aided knockdown of Ldeh at the final instar stage slightly impaired pupation and signifi cantly affected wing expansion. Around 20% of the Ldeh RNAi larvae remained as prepupae, completely wrapped in the old larval cuticles. These prepupae gradually darkened, dried and withered, and finally died. The remaining (about 80%) Ldeh hypomorphs became pupae and emerged as abnormal adults, bearing smaller and wrinkle elytra and hindwings. The adult tracheae in the Ldeh hypomorphs were full of liquid. In addition, the low pupation rate and high deformed adult proportion cannot be rescued by ingestion of either 20E or juvenile hormone. Thus, EH is critical for ecdysis and trachea clearance in L. decemlineata. The failure of trachea clearance may disenable air-swallowing during larva-pupa-adult transition and thus impacts wing growth and expansion.
Antioxidant activity and metabolic regulation of sodium salicylate on goat sperm at low temperature
Shen Wenzheng,Fu Yu,Bai Haiyu,Zhang Zhiyu,Cao Zhikun,Liu Zibo,Yang Chao,Sun Shixin,Wang Lei,Ren Chunhuan,Ling Ying-hui,Zhang Zi Jun,Cao Hongguo 아세아·태평양축산학회 2024 Animal Bioscience Vol.37 No.4
Objective: The purpose of this study was to explore the effect of sodium salicylate (SS) on semen preservation and metabolic regulation in goats. Methods: Under the condition of low temperature, SS was added to goat semen diluent to detect goat sperm motility, plasma membrane, acrosome, antioxidant capacity, mitochondrial membrane potential (MMP) and metabonomics. Results: The results show that at the 8th day of low-temperature storage, the sperm motility of the 20 μM SS group was 66.64%, and the integrity rates of the plasma membrane and acrosome were both above 60%, significantly higher than those of the other groups. The activities of catalase and superoxide dismutase in the sperm of the 20 μM SS group were significantly higher than those of the control group, the contents of reactive oxygen species and malondialdehyde were significantly lower than those in the control group, the MMP was significantly higher than that in the control group, and the contents of Ca2+ and total cholesterol were significantly higher than those in the control group. Through metabonomics analysis, there were significant metabolic differences between the control group and the 20 μM SS group. Twenty of the most significant metabolic markers were screened, mainly involving five metabolic pathways, of which nicotinic acid and nicotinamide metabolic pathways were the most significant. Conclusion: The results indicate that SS can effectively improve the low-temperature preservation quality of goat sperm.
SENP2 Regulates Hepatocellular Carcinoma Cell Growth by Modulating the Stability of β-catenin
Shen, Huo-Jian,Zhu, Hong-Yi,Yang, Chao,Ji, Fu Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8
SUMOylation has emerged as an important post-translational modification that modulates the localization, stability and activity of a broad spectrum of proteins. A dynamic process, it can be reversed by a family of SUMO-specific proteases (SENPs). However, the biological roles of SENPs in mammalian development and pathogenesis remain largely elusive. Here, we demonstrated that SENP2 plays a critical role in the control of hepatocellular carcinoma cell growth. SENP2 was found to be down-regulated in hepatocellular carcinoma (HCC) tissues and over-expression suppressed the growth and colony formation of HCC cells. In contrast, silencing of SENP2 by siRNAs promoted cancer cell growth. We further found that stability of ${\beta}$-catenin was markedly decreased when SENP2 was over-expressed. Interestingly, the decrease was dependent on the de-SUMOylation activity of SENP2, because over-expression of a SENP2 catalytic mutant form had no obviously effects on ${\beta}$-catenin. Our results suggest that SENP2 might play a role in hepatocellular carcinoma cell growth control by modulating the stability of ${\beta}$-catenin.
Pose Measuring and Aligning of a Micro Glass Tube and a Hole on the Micro Sphere
Fu-Dong Li,De Xu,Zheng-Tao Zhang,Ya-Li Shi,Fei Shen 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
To ensure high uniformity of the inner space of the hollow sphere after assembly, the glass tube must be inserted into the hole on thesphere towards the center of the sphere. This paper deals with the pose measuring of the hole on the sphere and the glass tube andpose aligning of the two objects. The sphere is 500 mm in diameter with a 20 mm hole on it, and the glass tube is 17 mm in diameter. Novel pose measuring method for the hole on the sphere and the glass tube is developed, using two microscopic cameras, each oneacquires a projection vector of the object to be measured. A plane containing the optical axis of the microscopic camera and the posevector of the object is determined, with the microscopic camera calibrated in advance. Pose vector of the object to be measured canbe calculated by the intersection of the two planes acquired by the two microscopic cameras. Error analysis of the pose measuringmethod is conducted and experimental results were consistent with analytical results. Less than 0.7o pose aligning error is achievedusing the proposed pose measuring method and pose aligning method.
Shen Guanghai,Kiem Phan Van,Cai Xing-Fu,Li Gao,Dat Nguyen Tien,Choi Yeon A,Lee Young Mi,Park Yong Ki,Kim Young Ho The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.6
A new biflavonol glycoside named as solanoflavone (1) was isolated from aerial part of Solanum melongena. The chemical structure was elucidated as isorhamnetin-3-O-$\beta$-D-glucopyranoside-(4'$\to$O$\to$4"')-galangin-3"-O-$\to$-D-glucopyranoside on the basis of physicochemical and spectroscopic methods, including 2D NMR spectral techniques.
Shen, Fang,Wu, Chun-Xiao,Yao, Yu,Peng, Peng,Qin, Zhi-Yong,Wang, Yin,Zheng, Ying,Zhou, Liang-Fu Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12
Background: Only few epidemiological data on primary central nervous system (CNS) tumors in Shanghai have been reported. Methods: All cases of primary CNS tumors that were registered at Center for Disease Control and Prevention (CDC) were collected (1973-2007: urban Shanghai; 2003-2007: whole Shanghai city). Trends were analyzed using joinpoint analysis and rates were stratified by age, gender and region. Histological data were collected from both CDC and Huashan Hospital. Results: From 1973 to 2007, the five-year average incidence rate in urban Shanghai increased in both genders, especially in the elderly population. Joinpoint analysis showed the age-adjusted incidence rate for males increased first but then plateaued, whilst rates for females continued increasing over the 35 years. For the five-year status quo (2003-2007), rural had a higher age-adjusted incidence rate than urban populations, and females higher than males, especially those with advanced age. According to CDC (2003-2007) and Huashan Hospital (1951-2011), the two most common histological subtypes were neuroepithelial tumors (with male predominance) and meningiomas (with female predominance). Conclusions: In Shanghai, a steadily increased incidence rate of primary CNS tumors was observed in general, and in the elderly and female population in particular.