• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 29
  • 21
  • 12
  • 12
  • 6
  • 6
  • 5
  • 4
  • 2
  • 1
  • Tagged with
  • 94
  • 15
  • 13
  • 11
  • 9
  • 9
  • 8
  • 8
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 5
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Distribution and Flux of the Polycyclic Aromatic Hydrocarbons of Kao-ping Estuary System

Wu, Sih-pei 06 February 2006 (has links)
Water, suspended particle and sediment samples from Kao-ping estuary were collected and measured for concentrations of polycyclic aromatic hydrocarbons (PAHs) during March 2004 and April 2005. In addition, sediments from neighboring coastal area were also analyzed to estimate distribution, transportation and possible sources of PAHs. Total PAH concentrations varied from 33.0 to 910 ng/g dry weight (dw) in coastal sediments, and diagnostic ratios reflect a mixed sources of petrogenic and pyrolytic inputs. Due to the contribution of Kao-ping River, spatial distribution of PAH concentrations at coastal sediments near river mouth varied dramatically. Results of hierachical cluster analysis showed that PAH concentration distribution was influenced by Kao-ping canyon, and biogenic source might be the major PAH source for offshore sediments. Total PAH concentrations in river sediment varied from 63.0 to 720 ng/g dw. Higher concentration was measured between the Water Main pipe and Shuang-yuan Bridge, and possible sources were from both petrogenic and pyrolytic sources. Sediment of Dung-gang harbour had highest concentration, 28,000ng/g dw, in this study, which was contributed from petrogenic sources due to its intensive boating activities. Except fluorene and phenanthrene in harbour sediments, individual PAH concentrations of other sediments are lower or near the Effect Range Low value, concentrations might lead to possible adverse effects upon organism. Total PAH concentrations varied from 5.0 to 82.0 ng/L in suspended particulate phase and from 5.5ng/L to 46.0ng/L in dissolved phase, respectively. Most of high molecular weight PAH concentrations (>5-ring PAHs) in dissolved phase were below method detection limits. The partition coefficients¡]Koc¡^values of PAHs were 1 to 2 orders higher than predicted values. It might be attributed to soot particles which have extremely high sorption capacities. Correlation coefficients between total PAH concentrations in sediments versus total organic carbon¡]TOC¡^ and fine particle content¡]<63£gm%¡^were significant ¡]R=0.575, 0.800, 0.851 and 0.657, P<0.01¡^. In addition, PAHs in suspended particulate phase and dissolved phase were also significantly correlated to particulate organic carbon¡]POC¡^ and dissolved organic carbon¡]DOC¡^, respectively. The distribution of calculated PAH concentrations from organic carbon was higher in surface water than bottom water. Unlike salinity, there was no decreasing or increasing trend of these concentrations among river samples. It is possible that contamination was not come from upstream, but from estuary area where plume was lifted and diffused upstream by neat seawater. The flux in Wan-da Bridge was higher than downstream estuary area that might be due to PAH concentrations reduction by sedimentation or degradation.
22

Air-Water Exchange of Polychlorinated biphenyls in Gao-Ping Coastal Areas, Taiwan

Mi, Zih-Rong 17 February 2011 (has links)
Persistent organic pollutants (POPs) were widely distributed in the environment, and may cause hazardous effects to human health. Among these pollutants, polychlorinated biphenyls (PCBs), due to their toxicity and bioaccumulation, have been banned in the mid 1970s in most countries. They are ubiquitous and highly persistent, and therefore, PCBs are of most concern for their potential to be globally transported through air-water exchange. Previous studies such as Fang et al.¡]2008¡^ and Chen¡]2010¡^have studied the air-water exchange of PCBs in Kaohsuing Harbor. This study not only continued monitoring this area but also included Gao-Ping coastal areas and Lanyu Island in order to determine the air-water exchange fluxes of PCBs in harbor and coastal area. The aim of this study was to determine the magnitude of PCB air-water exchange fluxes and dry deposition fluxes by measuring the gas/particle phase concentrations in ambient air and dissolved/particle phase concentrations in water column, and to analyze the compositional patterns of PCB homologs. Hierarchical cluster analysis (HCA) and principal components analysis (PCA) were performed with compositional patterns of commercial products such as Aroclor mixtures to gain a better understanding of pollution topography for PCBs . The concentrations of £UPCBs in the ambient air ranged from 116 to 439 pg m-3, with an average concentration of 164 pg m-3 . The average PCB concentrations in gas and particle phase were 161 pg m-3 and 2.91 pg m-3, respectively. The concentrations of £UPCBs in water column ranged from 14.1 to 1750 pg L-1, with an average concentration of 233 pg L-1. The average PCB concentrations in dissolved and particle phase were 162 pg L-1 and 70.4 pg L-1, respectively. The highest gaseous concentration of £UPCBs was observed in GRE in November, suggesting that wind direction and Linyuan Industrial Park may be the major contributor of PCBs there. However, the highest dissolved concentration of £UPCBs was found in KHH in August, indicating that rainfall and runoff of Typhoon Morakot were evident in source. Results from HCA, PCA and compositional patterns indicate that lower chlorinated congeners (dichlorobiphenyls to tetrachlorobiphenyls) were predominant in the gas and dissolved phase of ambient air and water column. In particle phase of ambient air and water column, PCB compositions were dominated by higher chlorinated congeners (tetrachlorobiphenyls to hexachlorobiphenyls). TEQ was used to determine the level of pollution for environment and human health. The average TEQ was 0.0008 pg-TEQ m-3 in gas-phase of ambient air and was 0.0006 pg-TEQ L-1 in dissolved phase in water. PCB114 was observed to be the predominant congener in this study. The average flux of air-water exchange was ¡Ï31.5 ng m-2 day-1, and was much higher than the average flux of dry deposition (¡Ð0.54 ng m-2 day-1). The net PCB fluxes in KHH suggest that annual air-water exchange was ¡Ï40.2 mg m-2 yr-1 and estimated yearly, 0.5 kg of PCBs were emitted from water column of Kaohsiung harbor to the ambient atmosphere.
23

Distribution of polycyclic aromatic hydrocarbons (PAHs) in Gao-ping coastal water column

Hsu, Sheng-chieh 29 November 2012 (has links)
Water, suspended particle and sediment samples from Gao-ping coastal water column were collected and measured to determine the spatial and temporal distributions of polycyclic aromatic hydrocarbons (PAHs) during August 2010 and June 2011. In addition, principal component analysis (PCA) and hierarchical the cluster analysis (HCA) were performed with chemical fingerprinting to understand the possible sources of PAHs in Gao-ping coast. The correlations between PAHs and several factors such as salinity, temperature and organic carbon were also discussed in the present study. The total PAH concentrations (dissolved and particulate phase) at four sampling campaigns ranged from 2.09 to 45 ng/L. Concentrations of dissolved PAHs ranged from 2.0 to 39 ng/L and the highest average concentrations were found in November 2010 (10.0 ¡Ó 9.90 ng/L). The particulate PAHs ranged from 0.13 to 40 ng/L and the maximum concentration was found in the estuary in August 2010. The total PAH concentrations of sediment ranged from 125-648 ng/g, which were lower than the Effect Range Low (ERL) and Threshold Effect Level (TEL) values, suggesting that few adverse ecological effects would arise from the PAHs in Gao-ping canyon. Results from chemical fingerprinting, PCA and HCA indicate that PAHs in this area were from complex sources such as combustion, petroleum, diagenesis or biogenic sources. Sources of PAHs in dissolved phase were mainly from petrogenic and mixed sources, while particulate PAHs were mainly from a mixed source. However, sources of PAHs in November 2010 and February 2011 were mostly from mixed combustion, suggesting that the PAH concentrations in particulate phase might be affected by atmospheric transport. The results showed that perylene in Gao-ping coast and canyon was mainly from the biogenic source. A significant correlaction was found in PAH fingerprinting between the esturine particles and sediment, indicating that the sediments in Gao-ping canyon might mainly come from Gao-ping River. Correlation analysis showed a significant positive correlation between concentrations of suspended particle and PAHs, while a negative correlation was found between PAH concentrations and temperature. In addition, organic carbon showed a significant correlation with PAHs in sediment samples. The partition coefficients (Koc) values of PAHs were higher than the values from other literatures, suggesting that it might be attributed to soot carbon.
24

Living (Rose Bengal Stained) Benthic Foraminifera in Sediments off the Southwest Taiwan

Chiang, Ai-Ping 24 August 2004 (has links)
The objective for this study was to provide the insight into the link between benthic foraminiferal assemblages and the surrounding environment. Stained sediment samples were collected from the continental shelf and slope off the southwest Taiwan, including the Kao-ping Submarine Canyon. In addition to faunal census, total organic carbon (TOC), carbonate, and coarse fraction of the sediments were also measured. Nevertheless, the downcore record of the excess 210Pb from selected sites offers the constraint for stratigraphy time frame for discussion. The benthic foraminiferal assemblages were analyzed by statistics. Clusters analysis shows that all species present in this study could be divided into two groupings. One is those distributed in outer shelf and the other is those found in the inner shelf of the southwest Taiwan. Different from previous studies, the spatial distribution of stained benthic foraminifera seems not to be related with TOC contents in the sediment and water depth. Both the diversity index and Eqitability show that sites inside of the canyon have lower values. The higher Living/Total ratios and lower dead tests at the head of Kao-ping Submarine Canyon than adjacent area might be the effect of migration. Furthermore, the species within the canyon are similar to the southern and northern continental shelf. These findings indicate that the spatial distribution of benthic forams within canyon might be the effect of transport, which could result from the complex interaction between tides and currents. Augmented with the profiles of excess 210Pb, the temporal variation of benthic foraminifera was revealed. Generally there is a progressive decrease in the abundance of Ammonia sp.. It is possible that the diminishing trend was caused by the increase of anthropogenic activity for the last 30 years.
25

Polychlorinated Biphenyls and Hexachlorobenzene in SurficialSediments of Kao-Ping Chi Estuary and Nearby Coastal Areas

Yang, Yi-Ning 24 August 2004 (has links)
Persistent Organic Pollutants (POPs), such as Polychlorinated Biphenyls (PCBs) or Hexachlorobenzene (HCB), released into water system. They will adsorb to particles, and incorporate into sediments. Thus the concentrations of PCBs and HCB in surface sediments provide information on recent contaminations. Besides, organisms in marine environment are influenced by the concentration in sediments, and so as the food chain. This study investigated the concentrations and characteristics of PCBs and HCB in surficial sediments of Kao-Ping Chi Estuary and nearby areas. The concentrations of PCBs and HCB in sediments were ranged from 1.432 to 6.681 (ng/g dry wt), and from 0.151 to 8.109 (ng/g dry wt¡^¡Awith an average of 3.219 and 1.978, respectively. Both of PCBs and HCB did not exceed the concentrations suggested by several sediment quality guidelines (SQGs). Compared with studies in other countries, the sediments in Kao-Ping coastal areas were more polluted by HCB. Neither PCBs nor HCB could correlate well with mean particle size or total organic carbon (TOC). The Toxic equivalents (TEQ) of dioxin-like PCBs and HCB were ranged from 0.014 to 0.061 pg-TEQ/g, and from 0.015 to 0.811 pg-TEQ/g, respectively. Using Principal Component Analysis, four possible principal components were found. These four principal components could account for 89.29% of the total variance. The first principal component was composed of highly chlorinated PCBs. The second principal component was composed of particle mean size and TOC. And the third and the fourth principal component were composed of di-, tri- PCBs and HCB. According to the factor score plot, the sample stations in this study could be divided into four groups. The first group was the stations that near the shore. The second group which contained stations were 4Km offshore. The third group contained stations with highly chlorinated PCBs. And the fourth group only contained one stations, D16. It was possible that there were other sources influenced station D16. In conclusion, the pollution in the surficial sediments was influenced by the distances from the pollutant sources and the particle size affected by tidal effect.
26

Concentrations and sources of polycyclic aromatic hydrocarbons in sediment cores of Kaoping submarine canyon

Chang, Wei-kai 08 August 2005 (has links)
Cores and sediment traps collected from Kao-ping Canyon were used to reconstruct historical record of PAHs contamination and find out the possible sources, distributions, trends and flux of PAHs. The sedimentary record of PAHs shows that the average concentration of total PAHs was 310 ng/g dry wt. (264¡ã364 ng/g) which was lower than coasts of the other countries. According to diagnostic ratios and statistical analysis, we identify sources of PAHs and suggest that all up-cores were dominated by petrogenic sources, but all down-cores except for C980 and S1 were tended to pyrogenic or mixed sources. In contrast, both C980 and S1 were showed higher perylene/£UPAHs (%), which suggests that biogenic sources dominate in C980 and S1. In comparison with sediment quality guidelines (SQGs), the PAHs concentrations of all sediment cores weren¡¦t exceeded the criteria, which suggests that no evident adverse biological effects exist caused by PAHs in Kao-ping Canyon. It shows that the transition from coal to petroleum fuel use corresponding to the total concentrations of PAHs decrease recorded during 1893-1935 period in the sediment core. A PAHs concentration peak also recorded during the World War ¢º, 1893-1935. Because of increase of importing fossil fuel and the growth of heavy industrials in Kao-Ping area, the total concentrations of PAHs were shown evidence of increase again since 1950s in the core from Kao-ping Canyon. The average PAHs flux in the upper and lower mooring deployed in Kao-ping Canyon were 66 and 108 £gg/m2/d, respectively, which were higher than coasts of the other countries. The PAHs sources of sinking particles were dominated by petrogenic sources which were as similar sources as all up-cores.
27

The Application of Integrated Marketing Communication on Taiwan modern theater¡XA case study of Ping-Fong Action Troupe

Wang, Tung-sheng 07 February 2006 (has links)
With the social progress in Taiwan, people have a wider choice of forms of recreation. Many changes have taken place in Taiwan's theaters since 1980 when theaters set up sequentially. Although some theaters have grown up and some vanished, as a form of recreation, the role of theater art has become more and more important. A theater has to count on box office to survive. In Taiwan, a main income of theater is the box office, which is chiefly concerned with its marketing strategies. In the past few years, performing arts groups have gradually adopted the business concepts of administration and marketing. It is impossible for the audience to perceive the full content and quality of a performance before making a purchase decision. Instead, the audience has to depend on past experiences, praises from others, or the promotional messages to support the decision. Among those, a theater can have a large control over the promotional messages sent out through their marketing channels. The traditional marketing strategies emphasized on delivering messages to target markets, but neglected their consistency. Thus, the communications elements, such as advertising, direct marketing, sale promotion, public relations, etc., were executed respectively, and could not approach the optimal effectiveness. Hence, Integrated Marketing Communication (IMC) rose up in 1990s and brought a new trend in marketing. The objective of this paper is to evaluate the IMC application in Ping-Fong Action Troupe by case study and in-depth interview. In the end, the researcher summarizes the IMC application in Ping-Fong Action Troupe on each tool, exams the consistency, and states researcher's own advices.
28

Crisis Management in Performing Arts Company ¡Ð A Case Study of the Shutdown Incident of Ping Fong Acting Troupe's "Incredible Country"

Sun, Shen-sui 08 February 2007 (has links)
People are usually unaware of crises. Good preparation and prevention routinely can reduce the impact and influence of a crisis when it occurs. People are frightened of the hazards from a crisis, but it can also be a turning point for the situation. A good crisis management can effectively avoid crises. Even when a crisis happens, the crisis management can minimize the damage and help an organization to resume its functions which may turn a crisis into an opportunity. Therefore, having a good knowledge of crisis management becomes more and more important in the modern society. This study uses three-stages crisis management theory, pre-crisis stage, in-crisis stage, and post-crisis stage, combining with the characteristics of performing arts in Taiwan to analyze and evaluate the shutdown incident of Ping-Fong Acting Troupe¡¦s ¡§Incredible Country¡¨ in 2001. There are three main purposes of this research: (1).To review the theories and practical knowledge about crisis management; (2).To examine the procedures of handling the cancellation of Ping-Fong Acting Troupe¡¦s ¡§Incredible Country¡¨ and to evaluate if their crisis management can be used by others. (3).To make some suggestions for the performing arts groups to understand the importance of crisis management. The study also recommends that a performing arts company should not only adapt the crisis management from business world, but also recognize the characters of performing arts. A good crisis management of a performing arts organization is to balance between its financial structure and artistic concern simultaneously.
29

Assessing the Carrying Capacity of the Kaoping River

Huang, Sheng-Shon 10 August 2001 (has links)
The Kaoping River basin is the largest and the most intensively used river basin in Taiwan. It is 171-km long, drains a catchment of more than 3,250 km2. Based on the current water quality analysis, the Kaoping River is heavily polluted. Concern about the deteriorating condition of the river led the Government of Taiwan to amend the relevance legislations and strengthen the enforcement of the discharge regulations to effectively manage the river and control the pollution. Investigation results demonstrate that both point and non-point source pollutants are now the causes of biochemical oxygen demand (BOD), nutrients, and pathogens in the river. The main water pollution sources are livestock wastewater from hog farms, municipal wastewater, industrial wastewater, non-point source (NPS) pollutants from agricultural areas, and leachate from riverbank landfills. The current daily BOD, NH3-N, and TP loadings to Kaoping River are 74,700, 39,400, and 5,100 kg, respectively. However, the calculated BOD, NH3-N, and TP carrying capacities are 27,700, 4,200, and 600 kg per day. To protect public health and improve the river water quality, the comprehensive management and construction strategy is proposed. The proposed strategy includes the following measures to meet the calculated river carrying capacity: (1) hog ban in the entire Kaoping River basin, (2) sewer system construction to achieve 30% of connection in the basin within 10 years, (3) removal of 10 riverbank landfills, and (4) enforcement of the industrial wastewater discharge standards. After the implementation of the proposed measures, the water quality should be significantly improved and the BOD and nutrient loadings can be reduced to below the calculated carrying capacities.
30

Inferred Suspended Sediment Transport Process in the Head Region of Kao-Ping Submarine Canyon Based on Temporal and Spacial Hydrographic Observations

Huang, Jeffery 12 July 2002 (has links)
Kao-ping submarine canyon is straightly connected with Kao-ping River. Thus, it is influenced by the river¡¦s discharge. In order to investigate this seasonal difference in the canyon, we conducted several researches, which were based on temporal and spacial observations of the hydrological and dynamical characteristic of the canyon. We also studied the transport of suspended sediment particles in the canyon according to the distribution of SSC (suspended sediment concentration). In our research, we made along-canyon profile observations. We collected data by using CTD, ADCP and Transmissometer on R/V Ocean Researches Vessel ¢». The data include flood season cruises (CR536, CR248, CR552, CR634 and CR639), and dry season cruises (CR572, CR598, CR608). Based on the temporal and spacial observations, in June and July 1999 we found a cold pool at the location where canyon topography changed sharply. We also found the density disturbance and high concentration at the same location. When the tidal current was landward in the deep canyon, we can observes upwelling in the head region of the canyon. Conversely, we can observe downwelling while the tidal current was seaward. Moreover, we observed a strong vertical flow in the dry season, which can make resuspended easily. Besides, we deployed an instrument covey, including sediment traps, Recording Current Meter (RCM), wave gauge (S700) and Laser In-Suit Scattering and Transmissiometry (LISST-100), at the location where we previously observed SSC localizes high for one month (from June to July 2000) to investigate the temporal relations among temperature, salinity, flow, and suspended particles. From this time series observation we found a coincidence between cold temperature signal and the northward flow. It showed that the cold water from deep sea was transported to the head region of the canyon by a ¡¥Pump¡¦ process. We also observed the suspended particles at the top (195m), middle (245m), and the bottom (285m) of the ocean. According to their different sizes, we found that the upper depth has more sands which were from the continental shelf, and the middle and lower depth have more silt and clay. Subsequently, we used Empirical Orthogonal Function (EOF) analysis to explain the relationship among hydrological and flow factors of the canyon. We concluded that two major modes to explain the observed relationship: Submarine canyon seasonal effect, and dynamic stability.

Page generated in 0.0353 seconds