scholarly journals Effectivity of micro drainage system as part of macro drainage system: A case study of Kelapa Gading, North Jakarta

2019 ◽  
Vol 276 ◽  
pp. 04021
Author(s):  
Ari Kusumawardhani ◽  
Dwita Sutjiningsih ◽  
Evi Anggraheni
Keyword(s):  
Channel Capacity ◽  
Flood Risk ◽  
Hydrological Model ◽  
Drainage System ◽  
System A ◽  
Simulation Results ◽  
The Government

Flooding is one of the problems that Jakarta faces every year. To handle the issue, the government took action to build the East Flood Canal. The canal construction is expected to reduce flooding, especially in the east and north region of Jakarta. However, the construction did not make the area immediately free of flood risk. Previous study (Susanti, 2017) showed that even with the existence of the East Flood Canal, potential inundations may still happen, specifically in the Cakung Lama area. In 2017, there were still several inundation points in the Sunter area, especially in Kelapa Gading. This research aims to identify the cause of inundations in the area by evaluating channel capacity in the micro drainage system in Kelapa Gading using hydrological model HEC-RAS 4.1.0 and WinTR. The simulation results showed that several channels in the system cannot accommodate the inflow, hence causing inundation in some areas in the Kelapa Gading area. According to the simulation results, it can be concluded that the micro drainage system in Kelapa Gading is not effective to accommodate the inflow.

The ‘bureaucratized’ project system: An organizational study of Chinese central governmental earmarked projects

2017 ◽  
Vol 3 (3) ◽  
pp. 409-449
Author(s):  
Puyuan Shi
Keyword(s):  
Local Governments ◽  
Institutional Design ◽  
Chinese Government ◽  
Structural Constraints ◽  
System A ◽  
Project Integration ◽  
Government Bureaucracy ◽  
The Government ◽  
Organizational Study

In recent years, a proliferation of central governmental projects has been taking place within the Chinese government bureaucracy. In order for us to understand this phenomenon, we need to examine both the bureaucracy and the project system. This article proposes three key features of the project system, which tends to be temporary, goal-oriented, and flexible, as well as innovative in institutional design. A comparison of these features with the basic elements of bureaucracy shows that underneath the superficial fusion of the two systems there is unavoidable tension. Given the fact that the Chinese bureaucracy lacks structural constraints and public participation in its decision-making process, projects seldom meet the target of an appropriate supply–demand equation. Tensions are particularly manifested in two areas: (1) projects are inter-departmental and temporary in nature while bureaucracy is always rigid and insular; and (2) projects are goal-oriented and flexible while bureaucracy is rule-oriented and hierarchical. In most cases, central governmental projects have to operate within the government bureaucracy, and thus we call the system a ‘bureaucratized project system.’ In our case study, we find that the bureaucracy resists the project integration reform because its power is being threatened even though it is apparently beneficial for project operations. We are not optimistic about the future of the project integration reform as the task has now been laid upon the already over-loaded and wrongly-motivated local governments while the state bureaucracy remains all powerful.

scholarly journals Hyperperfusion and intracranial hemorrhage after burr hole surgery of chronic subdural hematoma

2021 ◽  
Vol 12 ◽  
pp. 124
Author(s):  
Yu Shimizu ◽  
Kazuhiko Tokuda ◽  
Park Cheho
Keyword(s):  
Intraventricular Hemorrhage ◽  
Head Injuries ◽  
Drainage System ◽  
Chronic Subdural Hematoma ◽  
Burr Hole ◽  
System A ◽  
Closed Drainage ◽  
The Right ◽  
Closed Drainage System

Background: Chronic subdural hematomas (CSDHs) mainly occur in elderly people and usually develop after minor head injuries. CSDH can be cured by a relatively simple burr hole surgery. Rarely reported, hemorrhagic postsurgical complications include subarachnoid, intracerebral, intraventricular, and remote cerebellar hemorrhages. The causes of such uncommon complications are difficult to explain and remain poorly understood. Case Description: We report the case study of an 89-year-old man with CSDH who presented with the right hemiparesis. He underwent burr hole surgery with a closed-drainage system. A computed tomography (CT) scan conducted the following day demonstrated an acute intraventricular hemorrhage and hyperperfusion of the ipsilateral hemisphere. Conclusion: This is a rare case of an acute hematoma in the ventricle following drainage of a CSDH. The likely mechanism of this intraventricular hemorrhage could be that the drainage of the hematoma produced a movement of the ventricle and hemisphere accompanied by hyperperfusion.

Simulation research on the influence of special ships on waterway through capacity for a complex waterway system: a case study for the Port of Meizhou Bay

SIMULATION ◽  
2019 ◽  
Vol 96 (4) ◽  
pp. 387-402 ◽  
Author(s):  
Jianping Shang ◽  
Wenyuan Wang ◽  
Yun Peng ◽  
Qi Tian ◽  
Ying Tang ◽  
...  
Keyword(s):  
Simulation Model ◽  
Challenging Problem ◽  
Simulation Technology ◽  
Natural Conditions ◽  
Simulation Research ◽  
The Real ◽  
System A ◽  
New Construction ◽  
Simulation Results

The study of waterway through capacity for ports is a challenging problem due to the randomness and complexity of the waterway system, which needs to be analyzed by simulation technology. This paper quantitatively studies the influence of special ships on waterway through capacity and provides corresponding measures to improve waterway through capacity. The complex waterway system in the Port of Meizhou Bay is employed as a case study. Considering the actual conditions in the Port of Meizhou Bay, including the ships, berths, waterways, and natural conditions, a Simio-based simulation model is established. The real operation data from the Port of Meizhou Bay in 2015 are used to verify the correctness and effectiveness of the model. The simulation results show that special ships reduce the waterway through capacity by 4.9% and suggest that circumnavigation strategies that can be adopted after the extension and new construction of waterway systems can improve the waterway through capacity by 5.9%.

Valuing guarantees in a BOT infrastructure project

2004 ◽  
Vol 11 (6) ◽  
pp. 395-403 ◽  
Author(s):  
Andreas Wibowo
Keyword(s):  
Flow Model ◽  
Financial Impact ◽  
Toll Road ◽  
Contingent Liabilities ◽  
Road Project ◽  
Infrastructure Project ◽  
Reduce Risk ◽  
Simulation Results ◽  
The Government

Host governments often provide guarantees in build‐operate‐transfer (BOT) infrastructure projects to attract private sector investors. Problems arise because the governments often do not know the full extent of contingent liabilities when issuing guarantees, and because they account and record guarantee costs only when guarantees come due. This paper discusses the guarantees' financial impact from the perspectives of the government and the project sponsor. A typical Indonesian BOT toll road project is taken as the case study. Stochastic simulation using Latin Hypercube technique is applied on the cash flow model with and without guarantees. Several types of guarantees including minimum revenue guarantee, maximum interest rate guarantee, debt guarantee, tariff guarantee and minimum traffic guarantee are discussed. Simulation results reveal that guarantees can reduce risk but are not free of cost. If compared with equivalent subsidies, however, some guarantees can be more effective in lessening the extent of project risk.

Preparation and scheduling system of emergency supplies in disasters

Kybernetes ◽  
2015 ◽  
Vol 44 (3) ◽  
pp. 423-439 ◽  
Author(s):  
Liu Jia ◽  
Xie Kefan
Keyword(s):  
Petri Net ◽  
Simulation System ◽  
Workflow Model ◽  
Preparation Process ◽  
Content Type ◽  
Disaster Area ◽  
Speed Up ◽  
Simulation Results ◽  
The Government

Purpose – After the occurrence of a disaster, emergency supplies should arrive at disaster area in the shortest possible time. Therefore, it is of pivotal importance to speed up the preparation and scheduling process. In other words, only when the preparation process and scheduling process coordinate well, could the emergency supplies arrive at disaster area in time. Consequently, the purpose of this paper is to explore a method that can strengthen the coordination in various kinds of situations. Design/methodology/approach – The paper first elaborates the preparation and scheduling process of emergency supplies in disasters. Then, it establishes a workflow simulation system of the emergency supplies preparation and scheduling based on Petri Net. Afterward, the paper proposes a simplified simulation system of emergency supplies preparation and scheduling which can be employed in actual emergency response. Finally, the paper takes China Lushan Earthquake for a case study. Findings – By employing the simulation system proposed by this paper, decision makers can simulate the whole emergency supplies preparation and scheduling process, which can help them find a method that can optimize the current process. Specifically, by analyzing the simulation results, the government can obtain conclusions as follows. First, whether the preparation and scheduling process of emergency supplies can speed up or not. Second, which part of the process should be improved to realize the acceleration. Third, the workload of the staffs and experts. Fourth, whether it is necessary to add staffs or experts to work in parallel. Originality/value – This paper proposes a system that can coordinate the preparation process and scheduling process of emergency supplies in disaster. Then, it employs the Petri Net based workflow model to do simulation. The simulation results show that the system designed is reasonable and can be used in practical decision making on the preparation and scheduling of emergency supplies.

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