20,958 research outputs found
A 3-D FEM Numerical Model Using Unstructured Grids to Study Nutrients Circulation in Dapeng Bay
No full textCoastal lagoon is tend to encounter some impact of disturbance especially in rainfall events. During the heavy rain, the nutrients may transport from landside to lagoon by inflow. The abundance of nutrients may caused ecosystem loss of balance.
Dapeng Bay is located in southwestern Taiwan, which is an enclosed shallow coastal lagoon. Recently Dapeng Bay is developing into an international tourist and recreation area by Tourism Bureau, MOTC. In order to study the water quality and ecosystem impact after the develoment projects, we established a high resolution 3-D FEM numerical water dynamical model by using unstructured grids, and the model is not only coupled with biology states variables but also using on case studies. Wet and dry seasons are clear seasonal phenomena in southern Taiwan. Heavy rainfall has significant influence on the salinity of surface water, local effects near the two discharges would bring high concentration of nutrients to the territorial water.Therefore, this study is based on the long term observation data. Assuming silicon and phosphorus nutrients are adequate supply, we added both tidal circulation and meteorological factors to simulated the nitrogen base biology simulation.
The results show that Dapeng Bay is a nutrients excess area. After we calculated the model results of fluxes of phytoplankton carbon and compared the results to eutrophication standard defined by Nixon, we discovered that the water body of Dapeng Bay has already become eutrophic in the early spring, and it even have phenomena of hypertrophication after the heavy rainfall events.
The biological model simulation results are summarized and analyzed that although tidal inlets dredging project and strong wind stress help to improve the water circulation of Dapeng Bay, but the nutrients fluxes of model results show that a large influx of nutrients would still accumulate in Dapeng Bay during the rainfall events
Sources and concentration distribution of polycyclic aromatic hydrocarbons in Dapeng Bay
No full textThe aim of this study is to investigate the distributions of polycyclic aromatic hydrocarbons (PAHs) in sediment and water (suspended particles and dissolved phase) samples collected from Dapeng Bay(coast\ue3bay\ue3wetland and mangrove). Chemical fingerprinting techniques and statistical analysis were applied to delineate the possible sources of PAHs in sediment and water samples.
The average concentrations of total PAHs (\uce\ua351PAHs) ranged from 143 to 1595 ng/g dry weight (dw) in the sediments. Total PAH (\uce\ua346PAHs) concentrations varied from 11 to 38 ng/L in dissolved phase and from 1.4 to 15ng/L (252 to 772 ng/g dw) in suspended particulate phase, respectively. Comparing with sediment quality guidelines (SQGs), the total PAH concentrations in all sediment samples were below the criteria, suggesting that no adverse biological effects would arise from the PAHs in these sediments. The partition coefficients\uef\ubcKOC\uef\ubcvalues of PAHs were higher than predicted values. It might be attributed to soot particles which have extremely high sorption capacities.
Total organic carbon\uef\ubcPOC\uef\ubcand black carbon (BC) were significantly correlated with combustion PAH concentrations in Dapeng Bay. Combustion PAHs (Flt\uef\ubcPyr\uef\ubcBaA\uef\ubcChr\uef\ubcBbF\uef\ubcBkFa\uef\ubcBeP\uef\ubcBaP\uef\ubcIP\uef\ubcBghiP) concentrations were significantly correlated with black carbon (BC) in mangroves sediment cores and wetland A. In addition, total PAH concentrations were significantly correlated with combustion PAHs concentrations in dissolved phase. In suspended particulate phase, total PAH concentrations and combustion PAHs concentrations were significantly correlated with suspended solid (SS).
Results from diagnostic ratios and hierarchical cluster analysis (HCA) both indicate that PAHs in the coast of Dapeng Bay were mainly from petrogenic sources, but from petrogenic and pyrogenic mixed sources in the wetland and mangrove inside the Dapeng Bay.
In addition, the origin of perylene in Dapeng Bay and coastal sediments was mainly from the biogenic and pyrogenic, while it was from biogenic origin in wetland A and wetland B. However, the origin of perylene in mangrove M1 and mangrove M2 tended to be diagenetic
A Numeriacl Study on the Water Quality Impacts to Dapeng Bay due to Storm Flood Diversions
No full textDapeng Bay is a cosmopolitan tourist area, and there are many visitors coming here for leisure. Therefore the ecosystem is a concerned issues to everyone. In order to promote the ecosystem and the quality of the recreation experience, it is important to improve water pollution in Dapeng Bay. Thus, the water circulation and water quality are affected by season variation, especially during the rainstorm, the water pollution is caused by the diversion channel. The study use 3D hydrodynamic model coupled with an ecological model (SCHISM-ICM) on unstructured grid to simulate and analysis the water quality and nutrients distribution in Dapeng Bay. In this research ,rainfall accumulation data is from Central Weather Bureau , water sampling and water analysis are entrusting by the Blue Formosa Environmental Technology Corporation.
Comparing model results with the observations, the numerical result of tide level shows accurate performance. According to the numerical result, the nutrients are trapped in the harbor and in the eastern of bay where the flow velocity is lower. However, the dilution affect is limited because the transportation ratio of seawater is low between the bay and open sea. After setting flood diversion training jetty at the Nanzhou River ,the jetty is able to guide effectively the pollution of flood diversion to open sea on rainy season; in addition, adding the second inlet, it can improve water circulation in Dapeng Bay
Hui tu zhen ben jing shi mu yu jin gang zuan
No full text著作者余好辯, 伍憤時.Cover title.上下卷.On double leaves, East Asian binding.木魚歌文.zhu zuo zhe Yu Haobian, Wu Fenshi.Shang xia juan.Mu yu ge wen
Supplemental Material - Development and Validation of a Clinical Prediction Model to Diagnose Sinonasal Inverted Papilloma Based on Computed Tomography Features and Clinical Characteristics
No full textSupplemental Material for Development and Validation of a Clinical Prediction Model to Diagnose Sinonasal Inverted Papilloma Based on Computed Tomography Features and Clinical Characteristics by Zengxiao Zhang, Longgang Yu, Jiaxin Jiang, Lin Wang, Shizhe Zhou, Dapeng Hao, and Yan Jiang in Ear, Nose & Throat Journal</p
sj-pdf-1-imr-10.1177_03000605221094274 - Supplemental material for Rapid subcutaneous progression after immunotherapy in pretreated patients with metastatic carcinoma: two case reports
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605221094274 for Rapid subcutaneous progression after immunotherapy in pretreated patients with metastatic carcinoma: two case reports by Yong Da, Ge Shen, Ming Zhou, Tao Wang, Dapeng Dong, Lina Bu, Yun Shao, Qiyun Sun and Ruoying Yu in Journal of International Medical Research</p
[Yu Chen Dapeng tan hua]: [lun Lao She bi xia ren wu yu she hui xian xiang]
No full textTitle supplied by cataloguer.Live recording.Electronic reproduction from Rulan Chao Pian Audio Cassette Collection.Spoken in Chinese
A Three-Dimensional Numerical Study Of The Impacts On The Water-Exchange In Dapeng Bay Due To Inlet
No full textDapeng Bay is located in the southwest coast of Taiwan. It is a cystic shaped shallow lagoon, which has only one entry for exchanging lagoon water with the coastal current. The water quality is depending on the refreshing rate and the mixing level in the lagoon. In order to understand the circulation pattern monthly measurements using an ADP are carried out. Three water quality monitoring stations are constructed for regular online observation of the water quality in the lagoon.
The flows are on the west-northwest direction during the flood and toward the west during ebb. Strong currents are observed in the tidal inlet channel. The general circulation patterns are mainly dominated by tide though wind effects can observed from the measurements.
This study established a three-dimensional hydrodynamic modeling system using the FVCOM model developed at the U.S. Marine Ecosystem Dynamics Modeling Laboratory for the simulation of Dapeng Bay currents. The study includes the comparison of the recent circulation and the flow fields after broaden of the inlet navigation channel. This will change not only the shape but also dredge the channel deeper. These variations may differ the circulation patterns and the exchange quantities as well. The model results are first compared with the observations for the present situation as calibration. The simulation results for the studies of the changing of the inlet channel will be discussed
Yu Takeuchi
No full textYu Takeuchi is serving for JAXA since 2007 and currently working as Associate Senior Administrator at Management and Integration Department of Human Spaceflight Technology Directorate. He is also working as Researcher at the Institute of Space Law of Keio University. He received LL.M. degree from the Institute of Air and Space Law of McGill University in 2015. His main interest is in international space law inter alia the legal aspects of space traffic management and sustainable space development. He is a member of the Air Law Institute of Japan, Japanese Society of International Law, and the International Institute of Space Law (IISL).
Main Works Published in English
- “Toward the International Regime for Space Traffic Management -What to Fix the Current International Regulations-”, (November 5, 2014). Space Traffic Management Conference, Paper 23 (http://commons.erau.edu/stm/2014/wednesday/23).
- “Regulatory Regime for Tomorrow’s Suborbital Space Flights: Point-to-point International Flights”, 56th Colloquium on the Law of Outer Space, 2013.
- “Space Traffic Management as a Guiding Principle of the International Regime of Sustainable Space Activities,” 4 Journal of East Asia and International Law, 2011
- “Japanese Perspective on Legal Issues of Commercial Human Spaceflight” (co-author), 53rd Colloquium on the Law of Outer Space, 2011
- “Legal Points at Issue about NEO Threat Response and International Cooperation” (co-author), 28th International Symposium on Space Technology and Science, 2011
- “From Guideline to International Treaty for Rule of Law concerning Mitigation of Space Debris?” (co-author), 52nd Colloquium on the Law of Outer Space, 2010
Main Works Published in Japanese (title translated into English)
- “What is Space Traffic Management”, Vol. 46, No.9, Journal of the Japanese Institute of International Business Law, 2018.
- Soichiro Kozuka & Masahiko Sato eds., Introduction of Space Law for Entrepreneur (2nd. Ed.), Yuhikaku, 2018. (co-authored)
-“Challenges to International Space Law for Managing Space Traffic”, 55 Kuho (Air Law), 2014.
-“Legal Points as Issues of NEO Threat Response and International Cooperation” (co-author), 3 Spaceguard Research, Japan Spaceguard Association, 2011https://commons.erau.edu/stm-images/1121/thumbnail.jp
Chao cai liao yong yu ya bo chang ju jiao: ge xiang yi xing hao sun cai liao yu ti du guang xue na mi bo dao guan
No full textKwok, Hui Kin = 超材料用於亞波長聚焦 : 各向異性耗損材料與梯度光學納米波導管 / 郭栩健.Thesis M.Phil. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 67-69).Abstracts also in Chinese.Title from PDF title page (viewed on 26, September, 2016).Kwok, Hui Kin = Chao cai liao yong yu ya bo chang ju jiao : ge xiang yi xing hao sun cai liao yu ti du guang xue na mi bo dao guan / Guo Xujian
- …
