1,643 research outputs found
Adjusted (Vollenweider Model) total nitrogen (A) and phosphorus (B) in Northeast Lakes.
No full text<p>National Lake Assessment observed 2007 summer concentrations of (A) total nitrogen and (B) phosphorus in Northeast Lakes versus the Vollenweider (Vw) adjusted average annual SPARROW predicted concentrations. Robust non-linear regression was used to fit SPARROW predictions to 2007 NLA observations using the Vollenweider equation (H<sub>6</sub>). Observations are color coded by hydraulic residence time (HRT: Short < 0.04 years; Medium = 0.04 to 0.4 years; Long > 0.4 years). TN = Total Nitrogen. TP = Total Phosphorus.</p
M.-L. Vollenweider, Die Porträtgemmen der römischen Republik.
No full textGiard Jean-Baptiste. M.-L. Vollenweider, Die Porträtgemmen der römischen Republik.. In: Revue numismatique, 6e série - Tome 17, année 1975 p. 192
Vollenweider (Marie-Louise). Deliciae Leonis. Antike geschnittene Steine und Ringe aus einer Privatsammlung.
No full textDelplace Christiane. Vollenweider (Marie-Louise). Deliciae Leonis. Antike geschnittene Steine und Ringe aus einer Privatsammlung.. In: Revue belge de philologie et d'histoire, tome 65, fasc. 1, 1987. Antiquité - Oudheid. p. 229
Vollenweider (Marie-Louise). Deliciae Leonis. Antike geschnittene Steine und Ringe aus einer Privatsammlung.
No full textDelplace Christiane. Vollenweider (Marie-Louise). Deliciae Leonis. Antike geschnittene Steine und Ringe aus einer Privatsammlung.. In: Revue belge de philologie et d'histoire, tome 65, fasc. 1, 1987. Antiquité - Oudheid. p. 229
Thermophysiology and sleep : a comparison between women with and without vascular dysregulation and difficulties initiating sleep
No full textTemperature and sleep are closely interrelated. The fall of core body temperature (CBT) at the end of the waking period is caused by heat loss via distal vasodilatation, (warm hands and feet). This process induces sleepiness. The opposite takes place at the end of the sleep episode when heat production is dominant over heat loss: distal vasoconstriction and consequently a CBT increase occur leading to an increase in the propensity to wake up. Certain individuals, mostly women, experience unusual cold thermal discomfort from cold extremities throughout their daily life. They are diagnosed as suffering from a primary vascular dysregulation (VD). VD is associated with difficulties initiating sleep (DIS), hence manifest prolonged sleep onset latency (SOL). This is possibly related to vasoconstricted distal skin regions before habitual bedtimes. The general aim of this thesis was to obtain deeper insights into the relationship between thermoregulation and sleep. Individuals with VD and DIS provide a “model of nature” to study this relationship. A higher vasoconstriction level at habitual bedtimes, i.e. a lower distal-proximal temperature gradient (DPG), can be caused by: (1) a circadian phase delay of the thermoregulatory system; (2) a larger circadian amplitude of DPG; or (3) a generally lower 24-h mean level of DPG. Therefore a first study was designed aiming at a chronobiological characterization of women with VD and DIS (WVD) by means of a constant routine protocol comprising an episode of 40-h total sleep deprivation (SD) after and before an 8-h sleep episode. Compared with a similar young group of women who do not have VD and DIS (CON), WVD showed no differences in habitual bed times, but a 1-h circadian phase delay of the circadian patterns of CBT, DPG, melatonin and sleepiness (Chapter 2). Sleep deprivation had no effect on the thermoregulatory system in either WVD or CON. The difference in internal phase of entrainment (ψint) could be a cause of DIS, i.e. could impact sleep onset. Centered on the analysis of sleep stage and electroencephalogram (EEG) power spectral analysis, Chapterfocussed on whether the sleep architecture of WVD and CON varies and whether the challenge of SD impacts sleep of WVD and CON differently. WVD exhibited a diminished first Non-Rapid-Eye-Movement sleep (NREMS) episode, and hence reduced duration of the first NREM-REM sleep cycle. They also manifested a different evolution of delta power density (EEG power density in the 0.5 - 2.0 Hz range) across successive NREM-REM sleep cycles, i.e. the
decrease in delta-power was less pronounced from the first to the second cycle. EEG
power density in the delta and alpha frequency range (0.5 - 2.0 Hz and 7.25 - 9.75
Hz, respectively) tended to be lower in WVD compared to CON. A change in internal
phase of entrainment (i.e. phase delayed thermoregulatory heat loss with respect to
the sleep-wake cycle) may influence not only SOL but also ultradian sleep patterns.
The second study aimed at disclosing effects of a temperature stimulus on sleep,
simulating in WVD and CON reinforced heat retention and heat loss by means of
cool (28°C) and warm (39°C) 35-min head-out water i mmersions, respectively,
together with a neutral (35°C) bathing condition (C hapter 4). These conditions
resemble the thermoregulatory effects of the falling and rising limbs of the CBT in the
evening and morning, respectively. A subsequent 2-h afternoon nap revealed in CON
that bathing at those temperatures in the afternoon decreases and increases
convective body heat loss via the distal skin regions, prolonging and shortening SOL
in a subsequent sleep episode, respectively, without affecting REM sleep (REMS) ,
SWS, slow-wave activity (SWA; EEG power density in the 0.5 - 4.5 Hz range), and
REMS onset latency (REML). In contrast, the heat retention condition after cool
bathing generated a shorter REML and a faster REMS accumulation in WVD
compared to CON. Additionally, WVD had a longer lasting distal vasoconstriction,
hence lower DPG values during the sleep episode after cool bathing and
consequently a less pronounced CBT drop (afterdrop) than CON. WVD showed in
general a lower EEG power density in frequency bins of the theta and alpha
frequency ranges (4.5 - 9.75 Hz) irrespective of topography, i.e. frontal or occipital
region, or bathing condition, indicating a trait-dependent feature. However, reduced
SWA was found after cool bathing in the frontal region, a difference to CON that was
no longer detectable in the occipital region and after warm bathing, indicating SWA
as a state (temperature)-dependent characteristic in WVD. Reinforced heat retention
in WVD accentuates alterations of sleep parameters already existing under normal
night sleep conditions, and this indicates that at least some sleep parameters in WVD
may be influenced by the different thermophysiological conditions in these individuals
compared to CON.
Summarized together, the observed variations of thermoregulatory and circadian
processes in WVD compared to CON are not fully reflected in the sleep EEG. The
changes in these parameters are not directly related to changes in sleep stages and
EEG power density
Mind + machine : a decision model for optimizing and implementing analytics/ Vollenweider
No full textxx, p. 297: ill.: tab.; 24 c
Vollenweider model and trophic status indicator for reservoir water quality management
No full text碩士 水質指標與水質模式可評估水庫水質營養狀態，台灣環保署使用卡爾森營養狀態指標(CTSI)判斷水庫水質優養化與否。本研究統計台灣環保署1994年至2014年20座主要水庫水質監測資料，以Vollenweider模式與水質指標評估水庫營養狀態。研究目的為:(1)檢討台灣20座水庫優養化限制營養源、(2)比較水質標評估營養狀態之差異，(3) 以暴雨管理模式(SWMM)及Vollenweider模式估算南化水庫污染負荷量與營養狀態、及(4)比較Vollenweider與水質指標評估南化水庫水質營養狀態。此外，水質指標採用OECD、USEPA及Carlson總磷單一營養指標。
研究結果顯示臺灣本島主要20座水庫之約80%之水質氮磷比值大於15，故水質優養化限制營養鹽為總磷。以CTSI為指標時判定水體營養狀態為優養化之比例為31%，相對地以OECD平均值、OECD、USEPA及Carlson總磷單一指標之優養化比例分別為18%、15%、46%、及34%。依南化水庫2009-2014年之水質、水文與土地利用等條件，SWMM模式推估之年平均總磷負荷量為5,603公斤；以Vollenweider模式評估結果顯示水質營養狀態皆屬普養，且前述其他水質指標(CTSI、Carlson單一指標、OECD指標以及OECD平均值)判定結果相似皆為普養。此外，若南化水庫水質總磷達到10μg/L，以Vollenweider模式推估水庫涵容能力，則六年平均值及季平均超越機率之需削減總磷負荷量分別為32%與47%。Water quality index and water quality models are usually used to demonstrate the trophic states of reservoirs water quality. In Taiwan, the Carlson Trophic State Index (CTSI) is officially used by Taiwan EPA. The objectives of this study are to understand the trophic states of 20 main Taiwanese reservoirs with different water quality indices and moreover, to compare the results of Vollenweider model and water quality index used in Nanhwa reservoir. The purposes of this study were: (1) to evaluate the limited nutrient of eutrophication for the 20 reservoirs, (2) to compare the differences of various trophic indices, (3) to evaluate the pollution loadings and water quality of Nanhwa reservoir by SWMM (Storm Water Management Model) and Vollenweider model, (4) to compare the trophic states of Nanhwa reservoir by Vollenweider model and trophic indices. Moreover, trophic state index on single parameter of total phosphorus (TP) included Carlson, USEPA, OECD and OECD average.
The results show that about 80% of N/P ratios are larger than 15 for the main 20 reservoirs in Taiwan, so that the limited nutrient of eutrophication is phosphorous. The total phosphorous (TP) is suggested as the target water quality for reservoir management. While using the CTSI as the trophic state index, the percentage of eutrophication of the 20 reservoirs is 31%. However, the results are different with other indices. The percentage of eutrophication according to TP is 18%(OECD average TP), 15%(OECD TP), 46% (USEPA TP) , and 34% (Carlson TP), respectively. The validated SWMM model resulted in 5,603 kg-TP/yr pollution loads from Nanhwa reservoir watershed. The results of Vollenweider model also showed that the trophic state of Nanhwa reservoir is mesotrophic state, which is consistent with the results of other indices. If the target TP concentration is set as 10 µg/L for Nanhwa reservoir, 32% and 47% of the TP loads should be reduced respectively, according to the annual average and seasonal average results from Vollenweider model.目錄
目錄 I
圖目錄 III
表目錄 VI
第一章、 前言 1
1-1 研究緣起 1
1-2 研究目的 2
第二章、 文獻回顧 3
2-1 優養化 3
2-2 水質營養狀態指標 3
2-2-1 單一參數指標 4
2-2-2 多參數指標 7
2-3 Vollenweider模式評估水體污染負荷 8
2-3-1 國內案例 12
2-3-2 國外案例 15
第三章、 研究資料與方法 17
3-1 研究資料 17
3-2 水質指標工具 18
3-3 南化水庫 19
3-4 應用模式介紹 30
3-4-1 BASINS模式 30
3-4-2 SWMM模式 31
3-4-3 Vollenweider模式 33
3-5 模式建置 34
3-5-1 模式資料蒐集 34
3-5-2 BASINS模式建置 36
3-5-3 SWMM模式建置 37
3-5-4 Vollenweider模式建置 40
3-6 模式參數判定指標 41
第四章、 結果與討論 42
4-1 國內水庫水質優養化分析 42
4-1-1 20座主要水庫限制營養鹽 42
4-1-2 20座主要水庫總磷年平均達成率 44
4-1-3 20座主要水庫近20年水質(以TP為指標) 46
4-1-4 20座主要水庫近5年水質(以TP為指標) 50
4-1-5 20座主要水庫20年水質Chl-a與TP、SD、TN之相關性 53
4-1-6 20座主要水庫20年水質(以Chl-a為指標) 57
4-1-7 20座主要水庫近5年水質(以Chl-a為指標) 60
4-1-8 20座主要水庫北中南分區分析 63
4-2 南化水庫水質模擬分析 68
4-2-1 SWMM模式水文模擬結果 68
4-2-2 SWMM模式水質模擬結果 70
4-2-3 Vollenweider模擬結果 72
4-3 南化水庫污染負荷評估 77
4-3-1 以平均值推估 77
4-3-2 以超越機率推估 80
4-4 Vollenweider模式與營養狀態指標比較 84
4-4-1 與總磷單一營養狀態指標比較 84
4-4-2 與CTSI綜合營養狀態指標比較 86
第五章、 結論 87
參考文獻 88
圖目錄
圖 1-1 研究規劃架構圖 2
圖 2-1 水體中水文與磷之輸出與輸入示意圖 8
圖 2-2 Vollenweider模式水體營養狀態對照圖 11
圖 2-3 石門水庫區域圖 12
圖 2-4 石門水庫Vollenweider模式率定驗證圖 13
圖 2-5 水體營養狀態對照圖 16
圖 3-1 台灣本島20座重要水庫之分布圖 17
圖 3-2 南化水庫集水區 19
圖 3-3 南化水庫集水區雨量站分布與徐昇氏切割結果示意圖 20
圖 3-4 南化水庫水質測站分布圖 21
圖 3-5 1994-2014南化水庫CTSI變化示意圖 21
圖 3-6 1994-2006南化水庫氮磷比 22
圖 3-7 1995-2014南化水庫總磷濃度變化 23
圖 3-8 南化水庫集水區地形高程圖 24
圖 3-9 南化水庫集水區之鄉鎮行政區域範圍圖 26
圖 3-10 南化水庫集水區土地利用分佈圖 29
圖 3-11 SWMM模式演算流程圖 31
圖 3-12 SWMM模式運行模組架構圖 32
圖 3-13 邊界、土地利用、地形數值高程模型與河系示意圖 35
圖 3-14 BASINS模式介面與集水區劃分結果 36
圖 3-15 SWMM模式介面與集水區劃分示意圖 38
圖 3-16 南化水庫集水區徐昇氏切割結果 39
圖 4-1 20座主要水庫1997-2006年氮磷比分布圖 43
圖 4-2 各指標判定優養化之TP基準 46
圖 4-3 20座水庫20年CTSI與各TP指標判定優養化比例之比較 48
圖 4-4 20座水庫20年CTSI與各TP指標判定優養化比例之盒鬚圖 48
圖 4-5 20座水庫5年CTSI與各TP指標判定優養化比例之比較 52
圖 4-6 20座水庫5年CTSI與各TP指標判定優養化比例之盒鬚圖 52
圖 4-7 20座水庫葉綠素a與總氮之相關性 55
圖 4-8 20座水庫葉綠素a與總磷之相關性 55
圖 4-9 20座水庫葉綠素a與透明度之相關性 56
圖 4-10 20座水庫懸浮固體與透明度之相關性 56
圖 4-11 各指標判定優養化之Chl a基準 57
圖 4-12 20座水庫20年CTSI與各Chl a指標判定優養化比例之比較 59
圖 4-13 20座水庫20年CTSI與各Chl a指標判定優養化比例之盒鬚圖 59
圖 4-14 20座水庫近5年CTSI與各Chl a指標判定優養化比例之比較 62
圖 4-15 20座水庫近5年CTSI與各Chl a指標判定優養化比例之盒鬚圖 62
圖 4-16 北部水庫近5年優養化比例示意圖 64
圖 4-17 中部水庫近5年優養化比例示意圖 65
圖 4-18 南部水庫近5年優養化比例示意圖-1 67
圖 4-19 南部水庫近5年優養化比例示意圖-2 67
圖 4-20 南化水庫2009-2011年流量率定結果 68
圖 4-21 南化水庫2012-2014年流量驗證結果 69
圖 4-22南化水庫2009-2014年模擬總磷率定驗證結果示意圖 70
圖 4-23 南化水庫集水區污染來源 73
圖 4-24 Vollenweider模式模擬結果 74
圖 4-25 Vollenweider模擬結果優養狀態示意圖 76
圖 4-26 南化水庫集水區污染負荷熱點分布示意圖 79
圖 4-27 南化水庫2009-2014水力出流率季平均超越機率示意圖 81
圖 4-28南化水庫水力出流率季平均超越機率對照污染負荷之示意圖 83
圖 4-29 TP各指標判定基準 84
表目錄
表 2-1 OECD單一參數營養狀態標準 4
表 2-2 美國環保署單一參數營養狀態指標 4
表 2-3 Carlson單一參水庫水質指標 5
表 2-4 NLA單一參數營養狀態指標 5
表 2-5 OECD水庫水質營養狀態判定 6
表 2-6 CTSI指數值與水質營養程度之關係 7
表 2-7 總磷沉降率文獻資料 10
表 2-8 石門水庫SWMM之總磷負荷量推估 13
表 2-9 石門水庫各期程之污染負荷量與削減建議量 14
表 3-1 陸域地面水體水質標準 23
表 3-2 南化水庫集水區坡度分級表 24
表 3-3 南化水庫集水區各行政區域人口統計表 25
表 3-4 南化水庫集水區家庭污水產生污染負荷量推估 27
表 3-5 南化水庫集水區點源污染負荷量推估 27
表 3-6 越域引水污染負荷量 28
表 3-7 南化水庫集水區非點源土地利用面積 29
表 3-8 SWMM模式所需資料整理 34
表 3-9 SWMM模式屬性資料對照表 37
表 3-10 SWMM模式所需輸入參數 38
表 3-11 南化水庫集水區徐昇氏切割面積與權重百分比 39
表 3-12 Vollenweider模式之參數 40
表 3-13 模式模擬結果之統計指標特性表 41
表 4-1 20座主要水庫1997-2006氮磷比分布百分比(%) 42
表 4-2 20座水庫水體分類及其總磷年平均達成率變化 44
表 4-3 20座水庫20年CTSI與各TP 指標判定優養化比例（%） 47
表 4-4 20座水庫5年CTSI與各TP 指標判定優養化比例（%） 51
表 4-5 20座水庫20年水質各參數間之相關性（r） 54
表 4-6 20座水庫20年CTSI與各Chl a 指標判定優養化比例（%） 58
表 4-7 20座水庫近5年CTSI與各Chl a 指標判定優養化比例（%） 61
表 4-8 北部水庫近5年優養化比例(%) 64
表 4-9 中部水庫近5年優養化比例(%) 65
表 4-10 南部水庫近5年優養化比例(%) 66
表 4-11 南化水庫2012-2014年流量率定驗證結果 69
表 4-12 南化水庫2009-2014年總磷率定驗證MAPE結果 70
表 4-13 各土地利用總磷模擬參數設定表 71
表 4-14 南化水庫集水區總磷污染負荷量 72
表 4-15 Vollenweider模式模擬結果 73
表 4-16 Vollenweider模式率定驗證MAPE結果 74
表 4-17 單位面積負荷量與水力出流率對照表 75
表 4-18 南化水庫目標總磷濃度之污染負荷總量及需削減總量推估 77
表 4-19 南化水庫集水區污染負荷熱點及土地利用比例 78
表 4-20 南化水庫水力出流率範圍百分比 80
表 4-21 南化水庫2009-2014水力出流率超越機率 81
表 4-22 南化水庫各超越機率間水力出流率對照之污染負荷 82
表 4-23 南化水庫各超越機率間污染負荷量及削減量推估 82
表 4-24 各總磷營養狀態指標與Vollenweider營養狀態對照 85
表 4-25 CTSI與Vollenweider營養狀態對照 86學號: 603480335, 學年度: 10
Mind + machine : a decision model for optimizing and implementing analytics/ Vollenweider
No full textxx, p. 297: ill.: tab.; 24 c
sj-docx-1-jic-10.1177_08850666231217679 - Supplemental material for Neurological Complications of the Lower Extremities After Femoral Cannulated Extracorporeal Membrane Oxygenation: A Systematic Review
No full textSupplemental material, sj-docx-1-jic-10.1177_08850666231217679 for Neurological Complications of the Lower Extremities After Femoral Cannulated Extracorporeal Membrane Oxygenation:
A Systematic Review by Frauke Johannes, PT, MSc, Rahel Frohofer-Vollenweider, PT, MSc, and Yvonne Teuschl, PhD in Journal of Intensive Care Medicine</p
Contribution of Richard A. Vollenweider toward understanding eutrophication of the coastal Adriatic Sea
No full textThe main scope of the work of R. A. Vollenweider in Italy, that is to say his principal scientific merit, was to critically examine the cause-effect relationships related to the manifestations of the eutrophication phenomenon. These relationships were observed in the NW Adriatic Sea over more than 20 years, along the Emilia Romagna coast, an area strongly affected by Po river inputs, the principal Italian river (Vollenweider et al., 1992). In particular, he stressed the need to examine the integrated system, and to consider both scientific and socio-economic issues as interrelated. Accordingly, coastal waters and their catchment areas with related nutrient loads represent the total system, of which the natural, anthropogenic and socio-economic components are the respective subsystems. In more practical terms, he suggested nutrient load assessment based on the different sources of N and P, to prepare an inventory of all these sources according to types and quantity released, and in terms of pathways of transfer and input-output fluxes. In this way it was finally possible to reach a first realistic evaluation of N and P mass balance across the various productive compartments.</jats:p
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