1,539 research outputs found
Modeling the Evolution of the Wax Lake Delta in Atchafalaya Bay, Louisiana
No full textIn this study, a process-based, depth-averaged Delft3D hydrodynamic and morphologic model of the Wax Lake Delta in Atchafalaya Bay, Louisiana was developed to simulate a five year period of delta development. The purpose of this modeling effort was to test the ability of process-based modeling tools to successfully simulate typical delta-building processes and the resulting morphologic and stratigraphic characteristics of the delta. Recent developments in conceptual modeling of mouth bar formation and full delta development have confirmed the capability of process-based models to simulate the processes necessary for delta growth and the resulting long-term, geologic scale morphologic and stratigraphic features. In this attempt to model the actual development of a prototype delta using similar techniques to those employed in the conceptual delta models, the applicability of physics-based modeling to delta evolution simulation will be further validated. Morphology qualitatively reproduced typical river-dominant delta growth through the establishment of new depositional lobes while maintaining approximate radial symmetry. More specific stratigraphic features were also reproduced. The successive stacking of coarsening upwards sequences observed in Wax Lake Delta mouth bar deposits was evident in the stratigraphy of modeled incipient jet deposits, a result of the varying discharge regime. Though incipient jet deposits developed in the model at the distal ends of distributary channels, the prograding bars did not aggrade sufficiently to induce flow bifurcation and the development of a mature mouth bar depositional lobe. The overall coarsening-upwards, though sand dominant stratigraphic sequence of typical friction-dominant river mouth deposits is reproduced. Significant mud-dominant prodelta deposition is observed basinward of the original delta front location. In the prototype Wax Lake Delta, deposition of fine sediments in this area is hindered by waves and wind-induced transport, so the modeled mud depositional bodies do not reflect prototype development. Distributary channels are significantly incised and narrowed over the course of the simulation. The narrowing proceeds from significant sand-dominant subaqueous levee deposition on the channel banks. Though distributary channels in the real Wax Lake Delta do frequently incise through the full deltaic sedimentary sequence with channel extension, the modeled incision is persistent throughout the simulation. Upstream accretion of established delta lobes through sand-deposition, similar to the observed primary process of subaerial development in the neighboring Atchafalaya Delta, was also present in the modeled development. The Wax Lake Delta is clearly river-dominant according to traditional classification schemes; however, the deposition of fine sediments is influenced by basin processes that resuspend and export significant quantities from Atchafalaya Bay. The processes contributing to the coarse sediment depositional features that dominate the Wax Lake Delta are qualitatively simulated under purely riverine forcings, but the fine sediment dynamics cannot be accurately simulated in the present, process-limited model. Recommendations for improving morphological simulation include model redevelopment with an alternative, total load transport formulation and the inclusion of limited marine forcings that inhibit fine-sediment deposition.CoMEM - Coastal and Marine Engineering and ManagementSection Hydraulic EngineeringCivil Engineering and Geoscience
Agronomy, Maize
No full textPhotograph of Gerald Chambers, FFA Instructor and K.C. Bennett, SCS examine maize in Ottawa County
ODPOWIEDZIALNOŚĆ INWESTORA WOBEC PODWYKONAWCÓW (ART. 6471 § 5 K.C.)
No full textThe Liability of an Investor to a Subcontractor (Art. 6471 § 5 k.c.)SummaryThe article answers a question w hether an investor in case of a contract for construction works will be liable to a subcontractor also when he paid the latter all dues (including the rem uneration). These doubts are grounded in the form ulation of art. 6471 § 5 of the Polish Civil Code, according to which the party concluding a contract with thesubcontractor and the investor as well as the performer bear a joint andseveral liability for the payment of remuneration due to the subcontractor for the performed construction works. Taking into consideration a linguistic interpretation of the provision, as presented in the doctrine, it should be considered that the investor’s payment of the remuneration for the work performed by the subcontractor is permissible. Nevertheless, the author takes a different position based on the functional interpretation and interpretation referring to the whole system of the civil law. </jats:p
ODPOWIEDZIALNOŚĆ INWESTORA WOBEC PODWYKONAWCÓW (ART. 6471 § 5 K.C.)
No full textThe Liability of an Investor to a Subcontractor (Art. 6471 § 5 k.c.)SummaryThe article answers a question w hether an investor in case of a contract for construction works will be liable to a subcontractor also when he paid the latter all dues (including the rem uneration). These doubts are grounded in the form ulation of art. 6471 § 5 of the Polish Civil Code, according to which the party concluding a contract with thesubcontractor and the investor as well as the performer bear a joint andseveral liability for the payment of remuneration due to the subcontractor for the performed construction works. Taking into consideration a linguistic interpretation of the provision, as presented in the doctrine, it should be considered that the investor’s payment of the remuneration for the work performed by the subcontractor is permissible. Nevertheless, the author takes a different position based on the functional interpretation and interpretation referring to the whole system of the civil law.
Supporting data from Esquivel-Muelbert, A.; Bennett, A.C.; Sullivan, M.J.P.; Baker, J.C.A.; Gavish, Y.; Johnson, M.O.; Wang, Y.; Chambers-Ostler, A.; Giannichi, M.L.; Gomes, L.; Kalamandeen, M.; Pattnayak, K.C.; Fauset, S. A Spatial and Temporal Risk Assessment of the Impacts of El Niño on the Tropical Forest Carbon Cycle: Theoretical Framework, Scenarios, and Implications. Atmosphere 2019, 10, 588.
No full textData supports the publication:Esquivel-Muelbert, A.; Bennett, A.C.; Sullivan, M.J.P.; Baker, J.C.A.; Gavish, Y.; Johnson, M.O.; Wang, Y.; Chambers-Ostler, A.; Giannichi, M.L.; Gomes, L.; Kalamandeen, M.; Pattnayak, K.C.; Fauset, S. A Spatial and Temporal Risk Assessment of the Impacts of El Niño on the Tropical Forest Carbon Cycle: Theoretical Framework, Scenarios, and Implications. Atmosphere 2019, 10, 588.Here you can find all the files needed to replicate the analyses presented in the paper.It includes severity (Sev), Baseline (Base), Likelihood (Like), Temperature Anomaly (TempAnom), Forest Edge (ForEdge), Risk files for different El Niño years assess in the paper.</div
(14(4):28-32)THE EFFECTS OF 2,4-D, GIBBERELLIN, AND TOMATOTONE ON THE INDUCTION OF PARTHENOCARPY IN TOMATOES UNDER THE HIGH AIR TEMPERATURE CONDITIONS
No full text1. 本試驗為探求在高溫季節時如何誘致番茄單為結果之問題，在省農試所園藝系玻璃室內進行。時問為 50 年 6 月至 9 月之夏季溫度最高時期。
2. 本試驗使用 Manalee 番茄品種，在 50 年 6 月 1 日播種， 6 月 22 日定植於玻璃室內栽培。每處理使用 6 株共有 15 處理，總共使用株數為 90 株。
3. 每株開花 2 穗時摘去心芽，每穗留花 3 朵，多時摘去。在開花當天除 CK1 區以外每花剪去柱頭先端後處理藥品。
4. 使用2，4-D，Tomatotone 及 Gibberellin 三種藥品配製各種濃度浸漬當天番茄開花花朵約一秒鐘。
5. 在番茄生育期中玻璃室內溫度最高達48℃，最低為 23℃，平均為 34.57℃。
6. 使用 Tomatotone 比 2，4-D 結果良好。如再加用 Gibberellin 更佳。
7. 使用 Tomatotone 時以 1 %加用 Gibberellin 10p.p.m 最理想。
8. 使用 2，4-D 時以 10p.p.m 加用 Gibberellin 10p.p.m 最理想。
9. 生長期溫度過高影響果實之長大，每株最高產量僅為 112.38 公克，每果最重僅為 27.38 公克，故無商品價值。
It has been known that the conditions of unfavourable air temperatures (below 15°C or over 32°C) pollen grains of tomatoes do not develop, making it difficult to produce tomato fruits in mid-winter or summer season on lowland area of Taiwan. In these cases, parthenocarpy may be induced by certain chemicals.
The author studied the effects of 2,4-D, gibberellin, and Tomatotone in a green house where the highest temperature reached 45°C using Manalee tomatoes. Although in this experiment fruits produced were not large enough, smaller ones were produced when flowers dipped in various concentrations of 2,4-D or Tomatotone. The author also found that the combination of one per cent Tomatotone and 10 ppm of gibberellin showed the best results both in fruits-setting and fruit-size
(14(1):26-28)EXPERIMENT ON SEED POTATO PRODUCTION (2) THE PREPARATION AND TEST OF ANTISERUM TO POTATO VIRUS X
No full text為利用抗血清檢定馬鈴薯X毒素病，而利生產優良馬鈴薯種薯起見，於1961年（民國50年）1
月在本所製造馬鈴薯X毒素病抗血清，結果得精製血清120cc，並為了明瞭該抗血清之免疫力價，使用男爵種馬鈴薯葉汁，並以日本製造之同樣之抗血清以沈澱反應作比較結果，兩種抗血清反應均相同，即可證明本所製造之抗血清甚有應用價值。
The utilization of antiserum has been recognized as an easy and effective method to find latency potate virus X.
The author prepared 120 c.c. of antiserum by Bowder and Pine method, furthermore compared its efficiency with products of Japan, and the result may be satisfied
Contributing human and organizational factors for the failure of balconies in Maastricht
No full textIn 2003 five balconies of an apartment building in Maastricht, the Netherlands, collapsed, resulting in two fatalities. The building was just completed.Forensic investigations showed that detailing of the reinforcement in the precast concrete slabs of the balconies was questionable. Several design changes hampered clear force flow through the structural elements. Inappropriate design fixes were made after discovery of some cracks that could not avoid failure of a lower concrete ridge, resulting in a progressive collapse of the 5 balconies.Profound investigation of this case showed various human and organizational factors, that might have contributed to the failure. A complex process, with several design changes and many involved parties increased the probability of failure. Furthermore, insufficient communication, inadequate checking and inadequate follow up to warnings were present.This paper will give insight in technical causes of the failure and of contributing human and organizational factors. These underlying factors will be systematically studied, by using a theoretical framework.Accepted Author ManuscriptApplied Mechanic
Balconies in Maastricht
No full textThis chapter focuses on human and organisational factors that are usually behind the technical cause of failure. This is illustrated by a case of the collapse of five balconies in 2003 in Maastricht (The Netherlands) resulting in two fatalities.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Mechanic
Roof of FC Twente Stadium
No full textThis chapter focuses on human and organizational factors that are usually behind the technical cause of failure. In this chapter the focus is on the collapse of the extension of the roof of the Football Club Twente stadium in Enschede (The Netherlands) during construction, resulting in two fatalities.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Mechanic
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