Technical Feasibility

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Endovascular treatment of fusiform aneurysms with stents and coils: technical feasibility in a swine model

Endovascular treatment of fusiform aneurysms with stents and coils: technical feasibility in a swine model

Fusiform aneurysms are most frequently as- sociated with compressive or ischemic symp- toms, with intracranial hemorrhage being a less common clinical presentation (9). In common with saccular aneurysms, hope for overall im- provement in the treatment of fusiform aneu- rysms and their sequelae depends, in part, on the continued development of new therapeutic measures. Recently, intravascular stents com- bined with (10, 11) or without (8, 12) aneurysm coiling have been evaluated as potential thera- peutic devices in experimental saccular aneu- rysm models. The aim of this study was to as- sess the technical feasibility of endovascular stent implantation across experimental fusiform aneurysms in combination with coil placement within the aneurysm, with a view to flow pres- ervation in the parent artery and in “perforators” or branches arising from the aneurysm itself. For this purpose, a fusiform aneurysm model was created in laboratory swine. Given the more-complex morphologic features and the distinct symptoms of intracranial fusiform an- eurysms compared with simple saccular aneu- rysms, we critically assessed the suitability of stent and coil placement as a technique for treatment of experimental fusiform aneurysms.

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Performance Analysis and Technical Feasibility of an iUPQC in Industrial Grids

Performance Analysis and Technical Feasibility of an iUPQC in Industrial Grids

The iUPQC is a Unified Power Quality Conditioner in which the series converter emulates a sinu- soidal current source and the shunt converter emulates a sinusoidal voltage source. This approach provides indirect power quality compensation of the load voltage and the source current. Recent studies have suggested that the iUPQC has technical advantages in comparison with the conven- tional UPQC due to its reduced switching frequency characteristic. In this paper, these technical advantages are investigated. Thus, the iUPQC performance is verified through a 150 kVA industri- al equipment and technical design specifications are discussed: the iUPQC power circuit design, the converters arrangement and the driver configuration. Experimental results are provided to validate the technical feasibility and power quality compensation performance.

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Assessing policy constraints and technical feasibility of energy developments in cities

Assessing policy constraints and technical feasibility of energy developments in cities

When evaluating the suitability of a site for renewable energy generation, two different sets of potential issues must be considered. The first is technical with the constraints imposed by the location on the achievable power level. Assuming these can be managed, the policy constraints that might constrain or facilitate the likelihood of receiving planning permission to build at that location need to be understood by potential developers. With multiple possible factors affecting each of the technical and policy issues, a critical aspect of the method is to weight each factor appropriately to give a realistic screening of the resource. In addition, technical and policy evaluations can conflict, so in order to understand options for management, it is important to be able to identify the specific issues at play in any one location.

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Technical Feasibility of Sustainable Steel Slag Mixed Concrete

Technical Feasibility of Sustainable Steel Slag Mixed Concrete

Abstract: Introduction of new eco-friendly construction materials like steel slag is being necessary and promoted where exploration of natural aggregates for construction is restricted due to environment cause. Ecology gets threatened by disposal issue of steel industry waste products (Steel slag). This study focused on the properties of steel slag and its technical suitability in a concrete as replacement to coarse aggregates. Effects on workability, mechanical and durability properties were studied. Steel slag mixed concrete found suitable in mechanical properties, when in increase in percentage of replacement to coarse aggregates is high, whereas workability acted adversely. Optimum replacement (30 to 75 percentages) observed maximum results. Surface characteristics were affecting on workability and durability properties intensively. Steel slag aggregates found stable against acid attack, permeability, expansion, abrasion and temperature. This study culminates that the steel slag mixed concrete improves the properties of concrete than controlled concrete. Utilization of steel slag mixed concrete leads to sustainable and cost effective development.

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Robotic-assisted partial nephrectomy with sequential clamping of segmental renal arteries for multiple ipsilateral renal tumors: initial outcomes

Robotic-assisted partial nephrectomy with sequential clamping of segmental renal arteries for multiple ipsilateral renal tumors: initial outcomes

In order to further optimize the surgery treatment of MIRTs, we originally propose a novel clamping proced- ure of lesion-feeding arteries in RPN, the sequential clamping of precise segmental renal arteries (SRAs) [14]. Under the guidance of dual-source computed tomog- raphy (DSCT) [11–14], the technique has been success- fully applied in the procedure of laparoscopic partial nephrectomy (LPN) for the treatment of MIRT in our center since 2010 and reported in 2017 [15]. But precise hilar microdissection required by sequential SRA clamp- ing and one-time resection/renorrhaphy for multiple renal tumors are two major challenges of the technique in laparoscopic procedure. Robot-assisted platform can greatly help to overcome these challenges because of its two technical advantages. The first is its clearer 3D- field of vision with greater magnification than ordinary lap- aroscopic surgery, which can facilitate the identification of small branches of the renal arteries [10]. The other one is its more precise operating angle that can realize the quick resection and renorrhaphy of multiple lesions [9]. The aim of this study is to describe the application of sequential SRA clamping technique in the procedure of RPN and assess the technical feasibility for the treat- ment of MIRTs. Herein, we present our initial experi- ence and short-term outcomes of this technique in a series of twelve patients.

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The economic feasibility of upgrading Moree’s light industrial area to legally cater for restricted access vehicles

The economic feasibility of upgrading Moree’s light industrial area to legally cater for restricted access vehicles

The breakdown facility as proposed is also deemed to be technically feasible due to the construction being possible and could commence nearly immediately. It consists of works that can be completed entirely by MPSC staff and commonly used contractors and does not involve such extensive works like the Light Industrial Area. Whilst RAV access to the Light Industrial Area may then prove to be an arduous procedure with RAVs having to disconnect trailers before entering zero disruption will occur to the Light Industrial Area businesses during construction. With road rehabilitation and kerb and gutter works these businesses would be affected to some extent with typical dealings interrupted. Accesses would have to be closed whilst construction is carried out however this is not the case with the breakdown area. It would be recommended to take business owners opinions into account before making a final decision on technical feasibility and which option to progress with. 6.2.2 Traffic Considerations

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Feasibility of multi-sector policy measures that create activity-friendly environments for children: results of a Delphi study

Feasibility of multi-sector policy measures that create activity-friendly environments for children: results of a Delphi study

The overall response rate was 72.2% (range among muni- cipalities 50.0% to 90.0%) in the first and second Delphi round and 88.9% (range 75.0% to 100.0%) in the third Del- phi round (Table 2). Figures 1 and 2 show that the impor- tance respondents assign to the different aspects of feasibility are roughly the same per municipality and per policy sector: legal feasibility and technical feasibility were considered less important and cultural/community accept- ability, political feasibility, and cost feasibility were consid- ered of greater importance. Furthermore, respondents indicated that the three most important feasibility aspects were highly interconnected. According to the respondents, political feasibility is influenced by politicians’ perceptions of community acceptability, due to electoral considera- tions. The political feasibility on its turn defines the finan- cial resources that are reserved for certain policies and hence influences the cost feasibility.

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Feasibility, Procedural Morbidity and Mortality, and Long Term Follow Up of Endovascular Treatment of 321 Unruptured Aneurysms

Feasibility, Procedural Morbidity and Mortality, and Long Term Follow Up of Endovascular Treatment of 321 Unruptured Aneurysms

There are some limitations and bias in our series because it is a multicentric study with 5 different physicians. All were trained in the same neuroradiologic center, and all had more than 5 years’ experience with endovascular treatment at the beginning of our study. As with all procedures, risk is affected by patient selection, technical expertise, and supportive ser- vices, and its measurement is influenced by the definition of the outcome. The judgment of the “external” evaluator was the same for all patients included. Descriptions of retrospec- tive case series should be considered skeptically, given poten- tial sources of bias. Our results were retrospectively analyzed, but all patients were consecutively included in our data base. Our feasibility was only 94% because all patients were in- cluded before treatment, and no failures were expected from our data base. Most of the failures occurred at the beginning of inclusion (1999 or 2000); at this time, all angiographic instal- lations did not have 3D reconstruction, and the use of balloon remodeling was not systematic. It was definite progress to use these balloons, and there was an evident learning curve to their use.

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Symptom Differences and Pretreatment Asymptomatic Interval Affect Outcomes of Stenting for Intracranial Atherosclerotic Disease

Symptom Differences and Pretreatment Asymptomatic Interval Affect Outcomes of Stenting for Intracranial Atherosclerotic Disease

The date of stent placement procedure and anesthesia type were recorded. Lesions were classified by vessel and furthest downstream vessel segment treated, listed in On-line Table 1. Le- sion features and technical success were recorded according to those reported by the primary interventionalist, if available. When not explicitly stated, these data were assessed by investiga- tors conducting data review. The degree of stenosis was deter- mined by use of the Warfarin-Aspirin Symptomatic Intracra- nial Disease Trial (WASID) technique. 5,37 Stenosis length was

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A Preliminary Design of Pre-service Test Platform for HTR-10GT

A Preliminary Design of Pre-service Test Platform for HTR-10GT

After simulation experiments for the helium turbine was successfully held (Zhu, 2012), a pre- service test platform was designed to verify the technical feasibility of PCU, such as dynamic characteristics of rotor which was supported by AMBs and aerodynamic characteristics of turbo- compressor. On this test platform, the basic configuration and key structure parameters were the same or basically same as those in HTR-10GT project, and the thermal parameters followed similarity principle. All pre-service tests would be carried out on this platform. These tests would be divided into individual equipment tests and whole scale overall no-loading tests, in particular as tests of motor, tests of motor and gear box, tests of turbo-compressor, tests of turbo-compressor and active magnetic bearings rotor system. These tests would confirm the key technology of system operability, assembling, adjustment, control and parameters measurement, and provide basic references for the development of HTR-10GT.

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New Spacecraft and Protection of the Planet from the Asteroid Hazard

New Spacecraft and Protection of the Planet from the Asteroid Hazard

Abstract: A project is presented to create in Mars’ orbit a protective stations belt (PSB) designed to bring down the asteroid hazard to the Earth, based on an interplanetary spacecraft(ISC) of a new type. This project may as well contribute to the investigation of fundamental problems of astronomy and astrophysics in the study of the properties of deep space using space platforms. The project is based on technical realizations which feasibility derives from the cosmological theory of byuon (TB) about the formation of the physical space and the world of elementary particles along with the experimental findings about new properties of nature: a new force that is used in the form of thrust for spacecrafts and a new quantum information channel providing a connection between the Earth, the PSB and the ISC. The results of experimental investigations about the traction force with a ground model of spacecraft are recalled, confirming the existence of a global anisotropy of physical space as predicted by the theory of byuon, as well as the technical feasibility to harness the new force in order to implement new concept space thrusters significantly more energy-effective than existing models. An action plan to implement the creation of the ISC is worked out.

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Marine biosecurity post border management:
developing incursion response systems for New Zealand

Marine biosecurity post border management: developing incursion response systems for New Zealand

A technical advisory group may contribute to a risk assessment of the organism using any additional information that has been collected in the interim. The CTO-MB may decide to determine the species an Unwanted Organism on the basis of this assess- ment. We have developed incursion response risk assessment guidelines based on recognised environ- mental risk management standards (Standards Australia/Standards New Zealand 1999, 2000). The Ministry of Fisheries Marine Biosecurity Risk Management Framework (RMF) establishes the context for this risk assessment (Cox unpubl. data). The first step in the risk analysis is to determine the likelihood of an impact occurring if the incursion is left untreated. The likelihood analysis takes into account the potential distribution and abundance (both spatially and temporally) of the organism in New Zealand. This is based on the assumption that the more widespread an introduced species is, and the greater its abundance, the more likely it is to have adverse effects. The analysis considers the character- istics of both the organism and the recipient environ- ment when determining the potential distribution and abundance of the introduced species in New Zealand. These include temperature and salinity tolerances, habitat requirements (e.g., depth, substrate, wave exposure), natural and human-mediated dispersal capabilities, fecundity, availability of vacant niches (e.g., paucity of taxonomic or ecological equiva- lents), and presence of potential natural predators, parasites, herbivores, or pathogens.

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Technical and Economic Feasibility Studies of a Micro Hydropower Plant in Cameroon for a Sustainable Development

Technical and Economic Feasibility Studies of a Micro Hydropower Plant in Cameroon for a Sustainable Development

However, that country has significant hydroelectric potential. But only large power plants are often developed, leaving out many other sites favorable to the implantation of MHPP, able to satisfy the needs of electrification in the remote rural areas and thus contribute to their sustainable development. The aim of this study is to develop the feasibility studies of a MHPP project in the West Region of Cameroon, on a fall river of BAKASSA.

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The Preliminary Research of Sea Water District Heating and Cooling for Tallinn Coastal Area

The Preliminary Research of Sea Water District Heating and Cooling for Tallinn Coastal Area

The European Union 20-20-20 targets emphasize imple- mentation of renewable energy sources in member states energy balances. Sea water is a large renewable energy source, which can be combined with reversible heat pump technology to produce both thermal and cooling energy. The working principle is similar to geothermal energy production, but the sea water allows utilization of free cooling during spring and autumn period. The heat pump technology is studied widely around the World. A comprehensive review of heat pump systems implemen- tation possibilities in different fields and also recent im- provement with coefficient of performance (COP) is presented [1]. The heat pump technology rapid growth in 2005-2010 is documented [2,3]. The sea water electrically driven heat pump technology feasibility is compared with conventional district heating, in case the network radius is less than 5 km [4]. The calculation includes coal-fired plants electricity production losses and pumping costs. When the electricity is produced from natural gas, the radius degreases. Feasibility of different district heating and cooling production options is studied [5]. The life cycle costs are included (installation, system operating, maintenance costs). The sea water district heating and cooling is 1.5 times more expensive in China, due to relatively low coal-produced electrical energy price. All the economic calculations shall be carried out project by project separately. Indirect sea water cooling for Japan commercial buildings is researched [6]. Thermal storage

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ROLE OF PROJECT FINANCING APPRAISAL ON THE CREDIT RISK MANAGEMENT IN BANKING SECTOR IN RWANDA: A CASE STUDY OF GUARANTY TRUST BANK

ROLE OF PROJECT FINANCING APPRAISAL ON THE CREDIT RISK MANAGEMENT IN BANKING SECTOR IN RWANDA: A CASE STUDY OF GUARANTY TRUST BANK

Credit appraisal is normally conducted in the GTBank using the Credit Policy Guide (CPG). This document provides the guidelines for evaluating the project of the loan to find out repayment capacity of the borrower. The primary objective is to ensure safety of the money of the bank and its customers. The process involves appraisal of market, management, technical, and financial. Financial appraisal tries to assess the correctness or reasonability of the estimates of costs and expenses and also the projected revenues. These may include the estimation of selling price, cost of machinery, the overall cost of project and the means of financing. It involves extensive financial modeling in excel. Basically, it takes the financial statements of previous periods and forecasts the future financial position for at least till the loan matures. From that, the cash flows of each year are compared with the installment of loan because ultimately the cash flows are going to honor the payments of bank. Feasibility of the project is evaluated in terms of debt servicing capacity of the firm.

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Drainage of malignant ascites: patient selection and perspectives

Drainage of malignant ascites: patient selection and perspectives

Included studies were those examining patients suffering from MA and any background cancer, and included adults (over 18 years old), both female and male, who underwent drainage of ascites. Excluded studies were those examining patients with non-MA, or describing approaches other than fluid drainage interventions (eg, pharmacology, chemotherapy, biologic agent therapy, cytoreductive surgery, hyperthermia). Outcomes of interest were safety, feasibility, and efficacy of ascites drainage procedures, PRO, and QOL. Comparators were various methods of ascites drainage. Overall survival was not considered as an outcome because, first, the popula- tion of patients with MA is heterogeneous with many different primary cancers contributing to the development of ascites and, second, studies were performed in different settings (clinical oncology, palliative, gynecology, interventional radiology, and ambulatory departments).

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In-situ experiments for the determination of rock properties and behaviour at the Meuse/Haute Marne Centre

In-situ experiments for the determination of rock properties and behaviour at the Meuse/Haute Marne Centre

For technical reasons, due to trajectory precision when drilling a borehole, the behaviour of the rock mass in the immediate vicinity of the steel tube cannot be investigated. However, additional peripheral boreholes, drilled at a few tenths of centimeters from the cased borehole, will be instrumented to monitor the temperature, interstitial pressure and rock deformation around the cased borehole. These measurements, together with the results of previous numerical modeling and experimental results, will help to estimate the conditions occurring at the rock mass/steel tube contact.

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Upgrading Wastewater Treatment Plants Based on Reuse Demand, Technical and Environmental Policies (A Case Study)

Upgrading Wastewater Treatment Plants Based on Reuse Demand, Technical and Environmental Policies (A Case Study)

Reclamation and reuse programs are an indispensable part of integrated water resource management, particularly in arid and semi arid regions. Yet, the feasibility of sustainable application not only is relied on design, operation and maintenance of wastewater treatment plants, but also could be influenced by the economical and environmental aspects of reuse demands. This study is aimed to illustrate different policies applicable for upgrading wastewater treatment plants with emphasize on nutrients management in the reclaimed water. For this purpose, 6 domestic wastewater treatment plants in Tehran were analyzed and discussed based on effluent characteristics and reuse demands. As a result, it was recommended that in a framework of demand based policy, and due to economical, practical and environmental limitations, Shahrake Ghods and Mahallati wastewater treatment plants should be upgraded with flexible operated tertiary units. To compare and select the most appropriate unit, the value function was defined and the attached growth based method was determined as a solution. Subsequently, to ensure the environmental protection, the implementation of floating plants treating surface waters, in association with assignment of dynamic trading discharge permit market in reuse program were suggested. Consequently, it was implied that all these solutions would simply be achieved through integrated water and wastewater management.

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A framework for assessing the feasibility of malaria elimination

A framework for assessing the feasibility of malaria elimination

To do so, it is necessary to compare the potential cost of the programme if the goal is control with the alterna- tive expenditure required to achieve and sustain elimi- nation. Because elimination will be more expensive in the short-term, this comparison should take a medium- to long-term view to present an accurate picture of cumulative and annual costs over time, as determined to be policy-relevant by local decision-makers. Most cur- rent planning occurs on five-year budgeting cycles [40], so an appropriate long-term cost estimate for a control programme will need to be devised. Ideally, this estimate should represent an optimized control package of inter- ventions rather than one that simply seeks to achieve universal access with all available tools, since the relative attractiveness of elimination will differ depending upon the cost of its alternative. In the absence of such an optimized cost estimate, it may be assumed less robustly that the currently budgeted costs of maintaining CLM (for example, from recent Global Fund proposals) will remain relatively stable over time and, assuming that drugs and insecticides remain effective, are mainly influ- enced by population growth. Analyses of recent or con- temporary elimination programs have found that the average annual cost of achieving elimination is substan- tially greater than that of CLM and that elimination programs are unlikely to generate cumulative financial savings [23,24]. However, these analyses also found con- siderable variation in costs between country contexts, emphasizing the importance of conducting a robust financial analysis to assess elimination feasibility.

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