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Expansion behavior of concrete containing different steel slag aggregate sizes under heat curing
Chun-Ya Shu,Wen-Ten Kuo 사단법인 한국계산역학회 2015 Computers and Concrete, An International Journal Vol.16 No.3
This study investigated particle expansion in basic oxygen furnace slag (BOF) and desulfurization slag (DSS) after heat curing by using the volume method. Concrete hydration was accelerated by heat curing. The compressive strength, ultrasonic pulse velocity, and resistivity of the concrete were analyzed. Maximum expansion occurred in the BOF and DSS samples containing 0.30-0.60 mm and 0.60-1.18 mm particles, respectively. Deterioration was more severe in the BOF samples. In the slag aggregates for the complete replacement of fine aggregate, severe fractures occurred in both the BOF and DSS samples. Scanning electron microscopy revealed excess CH after curing, which caused peripheral hydration products to become extruded, resulting in fracture.
Successful Enrichment of Rarely Found Candidatus Anammoxoglobus propionicus from Leachate Sludge
( Shu Chuan Hsu ),( Yen Chun Lai ),( Ping Heng Hsieh ),( Pun Jen Cheng ),( Suen Shin Wong ),( Chun Hsiung Hung ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.7
Bacteria that mediate the anaerobic oxidation of ammonium (anammox) have been detected in natural ecosystems, as well as various wastewater treatment systems. In this study, sludge from a particular landfill leachate anaerobic treatment system was selected as the incubation seed for anammox microorganism enrichment owing to its possible anammox activity. Transmission electron microscopy observation, denaturing gradient gel electrophoresis analysis, and cloning/sequencing techniques were applied to identify the diversity of anammox microorganisms throughout the incubation. During the early stage of operation, the diversity of anammox microorganisms was similar to the original complex microbes in the seed sludge. However, as incubation time increased, the anammox microorganism diversity within the system that was originally dominated by Candidatus (Ca.) Brocadia sp. was replaced by Ca. Anammoxoglobus propionicus. The domination of Ca. Anammoxoglobus propionicus produced a stable removal of ammonia (70 mg-N/l) and nitrite (90 mg-N/l), and the total nitrogen removal efficiency was maintained at nearly 95%. The fluorescence in situ hybridization results showed that Ca. Anammoxoglobus propionicus was successfully enriched from 1.8 ± 0.6% initially to 65 ± 5% after 481 days of operation. Therefore, the present results demonstrated the feasibility of enriching Ca. Anammoxoglobus propionicus from leachate sludge, even though the original cell count was extremely low. Application of this seldom found anammox organism could offer an alternative to current ammonia-nitrogen treatment.
Shu-Chen Chien,Chao-Ti Hsiung,Shu-Fang Chen,Chun-Pin Lin 환태평양유아교육연구학회 2010 Asia-Pacific journal of research in early childhoo Vol.4 No.2
The collaborative teaching research was conducted in northern Taiwan’s Tayal indigenous tribe to practice a constructivist inquiry-based science project curriculum implementing place-based education for kindergarten children. Research participants included 2 classroom teachers and 15 young children. Entering the natural tribal context, the researcher collected data through field observations, interviews, and other documentation. Qualitative method was adopted to analyze research data. A bamboo project was implemented relating to children’s life experiences. Research findings reveal: (1) teachers and children managed to co-construct a science project curriculum based on local resources and Tayal traditional knowledge (2) children developed basic scientific concepts and knowledge about natural plants through the inquiry-based project curriculum and (3) teachers regarded their roles as being colearners with children and realized the importance of children’s active involvement in the constructivist inquiry-based teaching. The result can help to improve science teaching/learning for indigenous children by utilizing environmental resources as well as traditional knowledge in future education.
Analytical model of expansion for electric arc furnace oxidizing slag-containing concrete
Chun-Ya Shu,Wen-Ten Kuo,Chuen-Ul Juang 사단법인 한국계산역학회 2016 Computers and Concrete, An International Journal Vol.18 No.5
This study applied autoclave expansion and heat curing to accelerate the hydration of concrete and investigated how these methods affect the expansion rate, crack pattern, aggregate size effect, and expansion of electric arc furnace oxidizing slag (EOS)-containing concrete. An expansion prediction model was simulated to estimate the expansion behavior over a long period and to establish usage guidelines for EOS aggregates. The results showed that the EOS content in concrete should range between 20% and 30% depending on the construction conditions, and that coarse aggregates with a diameter of ≥4.75-mm are not applicable to construction engineering. By comparison, aggregates with a size of 1.18-0.03 mm resulted in higher expansion rates; these aggregates can be used depending on the construction conditions. On Day 21, the prediction model attained a coefficient of determination (R2) of at least 0.9.
Studying the Strain Effect on Silicon Atomic Wires
Shu-Tong Chang,Shu-Hui Liao,Hsiao-Chun Huang,Chee-Wee Liu,Chung-Yi Lin 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.6
The transport properties of a Si3 atomic wire system, which is formed by a Si3 cluster connected to two lithium electrodes with bias applied, is studied using the simulator Virtual NanoLab that is constructed based on the non-equilibrium Green’s function (NEGF) scheme. We investigated the Si3 atomic wire system under three strain conditions (tensile, compressive and shear). Different trends in the I-V characteristics are observed for the three cases at various applied biases. The transmission spectrum T(E, Vb), as a function of energy and applied biases, are analyzed. The interactions among eigenstates of the molecular projected self-consistent Hamiltonian (MPSH) strongly affect the transport properties of the system.
Shu-Tsen Liu(Shu-Tsen Liu),Sheng-Che Lin(Sheng-Che Lin),Jane Pei-Chen Chang(Jane Pei-Chen Chang),Kai-Jie Yang(Kai-Jie Yang),Che-Sheng Chu(Che-Sheng Chu),Chia-Chun Yang(Chia-Chun Yang),Chih-Sung Liang( 대한정신약물학회 2023 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.21 No.1
There is growing evidence that the coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is associated with increased risks of psychiatric sequelae. Depression, anxiety, cognitive impairments, sleep disturbance, and fatigue during and after the acute phase of COVID-19 are prevalent, long-lasting, and exerting negative consequences on well-being and imposing a huge burden on healthcare systems and society. This current review presented timely updates of clinical research findings, particularly focusing on the pathogenetic mechanisms underlying the neuropsychiatric sequelae, and identified potential key targets for developing effective treatment strategies for long COVID. In addition, we introduced the Formosa Long COVID Multicenter Study (FOCuS), which aims to apply the inflammation theory to the pathogenesis and the psychosocial and nutrition treatments of post-COVID depression and anxiety.
Comparative analysis of type 2 diabetes-associated gut microbiota between Han and Mongolian people
Shu-chun Li,Yao Xiao,Ri-tu Wu,Dan Xie,Huan-hu Zhao,Gang-yi Shen,En-qi Wu 한국미생물학회 2021 The journal of microbiology Vol.59 No.7
Due to the different rates of diabetes in different ethnic groupsand the structural differences in intestinal microbiota, thisstudy evaluated the changes in diabetes-related intestinal microbiotain two ethnic groups. Fifty-six stool samples werecollected from subjects from the Han and Mongolian ethnicgroups in China, including participants without diabetes(non-diabetic, ND) and with type 2 diabetes (T2D). The 16SrDNA gene V3 + V4 area was extracted from microbiota,amplified by PCR, and used to perform high-throughput sequencingand screen differential microbiota associated withethnicity. The results showed that there were 44 T2D-relatedbacterial markers in the Han subjects, of which Flavonifractor,Alistipes, Prevotella, Oscillibacter, Clostridium XlVa,and Lachnospiracea_incertae_sedis were most closely relatedto diabetes. There were 20 T2D-related bacterial markers inthe Mongolian subjects, of which Fastidiosipila and Barnesiellawere most closely related to diabetes. The commonmarkers of T2D bacteria in the two ethnic groups were Papillibacterand Bifidobacterium. There were 17 metabolic pathwayswith significant differences between the ND and T2Dgroups in the Han group, and 29 metabolic pathways in theMongolian group. The glutamatergic metabolic pathway wasthe only common metabolic pathway in two ethnic groups. The composition and function of diabetes-related bacteriawere significantly different among the different ethnic groups,which suggested that the influence of ethnic differences shouldbe fully considered when studying the association betweendiabetes and bacteria. In addition, the common bacterialmarkers found in diabetic patients of different ethnic groupsin this study can be used as potential targets to study the pathogenesisand treatment of diabetes.
The Influence of Resilience on the Coping Strategies in Patients with Primary Brain Tumors
Shu-Yuan Liang,Hui-Chun Liu,Yu-Ying Lu,Shu-Fang Wu,Ching-Hui Chien,Shiow-Luan Tsay 한국간호과학회 2020 Asian Nursing Research Vol.14 No.1
Purpose: The purpose of this study was to assess the amount of variance in the coping strategies of patients with brain tumors that could be accounted for by resilience. Methods: This cross-sectional survey involved 95 patients who had experienced surgical, chemotherapy, or radiotherapy therapies for their brain tumors at least 1 month before data collection. The investigator collected data using the scales of the Ways of Coping Checklist-Revised and Resilience Scale. Data were analyzed using descriptive statistics, t tests, analysis of variance, Pearson product–moment correlation, and hierarchical multiple regression. Results: The results revealed that resilience was significantly positively associated with patients' problem-focused coping (r = .65, p < .001) and total coping (r = .49, p < .001). In addition, resilience accounted for 27% (R2inc = .27, p < .001) and 16% (R2inc = .16, p < .001) of the distinct variances in predicting patients’ problem-focused coping and total coping. Conclusion: The current results provide evidence to support the importance of resilience in shaping the coping strategies of relevant patients. As resilience shows a crucial element in patient coping with brain tumors, health team members should develop and employ appropriate strategies to improve the resilience of patients with brain tumors.