Installation Of Machine Research Articles

Methodical Approach to Calculation of the Maintenance Cost for 3D Built Printing Equipment

The issues related to the feasibility study of the effectiveness of the use of 3D printing technology in residential construction are considered. The criteria for efficiency are indicated such as minimum human labor and minimum direct costs per m2 of the total area of a residential facility. It is noted that direct costs include the cost of materials, human labor, the operation of machinery. In the process of calculating performance indicators, the greatest difficulty arises with determining the cost of 3D printer, the value of which depends on the annual fund of the printer operation time, its performance and the cost of operation machine-hour. The cost of a machine-hour contains the cost of depreciation, human labor costs, the replacement of high-wear parts and units of machines, for energy, maintenance, relocation and installation of machines on the construction site. For each of the indicated cost elements, methodical approaches are proposed and corresponding calculation schemes are presented. From the data obtained as a calculation result, it follows that to the greatest extent, the cost of operating machines per m3 of concrete mix, depends on the printer’s performance, and in the cost structure of a machine-hour the depreciation costs comprise the maximum share determined as a percentage of the cost of the unit. In this regard, as one of the strategic directions of expanding the use of 3D-additive construction technologies, the cost reduction of modern printers is indicated.

Enablers and Challenges in the Implementation of Active Case Findings in a Selected District of Karnataka, South India: A Qualitative Study.

Background Active case finding (ACF) for tuberculosis (TB) is a promising tool to enhance early case detection among marginalized populations. As opposed to passive case finding, it involves systematically searching for TB in individuals who would not spontaneously present for care. The National TB Program (NTP) of India has initiated ACF for TB through the existing general health system since the end of 2017. However, prior to scale-up, there is need for exploring the implementation challenges and solutions to improve the efficiency of this program. Objectives (1) To explore the enablers and challenges in the implementation of ACF for TB by NTP in the Bengaluru rural district of Karnataka, South India, and (2) to explore the perceived solutions to improve the efficiency of ACF activity. Methods A qualitative descriptive study was conducted in the Bengaluru rural district during July 2018. In-depth interviews using purposively selected health care providers involved in active case finding (n = 9) and presumptive TB patients (n = 9) and presumptive TB patients (Results The challenges in conduct of ACF were as follows: inadequate training of health care workers, shortage of staff, indifferent attitude of community due to stigma, lack of awareness about TB, illiteracy, inability to convince patients for sputum test, and delay in getting CBNAAT results. The field staff recommended the installation of mobile CBNAAT machine, involvement of general health staff in activity, training of health workers on counseling of patients, and issue of identity cards for community health workers/volunteers so that people recognize them. Conclusion The health system challenges in conduct of ACF need to be addressed by training the health staff involved in activity and also improving the access to TB diagnostics.

The design of the guide frame of the tunneling shield for laying communications under the riverbed

The article presents the option of improving the working equipment of the tunnel-boring complex for laying underground utilities, including trunk pipelines. The method of trenchless laying of underground utilities, consisting in a combination of methods of horizontal directional drilling and micro-channeling, is proposed. The proposed technology does not require the construction of a preliminary mine and a site for the installation of a drilling machine and allows one to combine in one working step the drilling of a well, the laying of a pipeline, welding and insulation works. Presents calculations aimed at determining the forces of movement of the shield, the definition of the power of the shield, as well as the calculation of the strength of the shield. The technique of carrying out technological operations is demonstrated taking into account the use of the proposed technical solution.

Installation, commissioning, and performance evaluation of Bhabhatron-II TAW – An Indian-made telecobalt unit

Aim: The aim of this study was to report commissioning and performance evaluation of Bhabhatron-II TAW (an Indian made machine). Materials and Methods: Commissioning comprises of following quality assurance (QA) (a) electrical QA, (b) mechanical QA, (c) radiation QA and (d) survey of installation. Electrical QA were done for various components of the unit for its functionality. Mechanical QA were done and the measured data were verified as per guidelines of Atomic Energy Regulatory Board (AERB), India and vendor's specified values. Cylindrical ionization chamber, electrometer, ready pack films, water phantom, thermometer and barometer were used during radiation QA and survey of installation procedures. Moreover, the data so generated were fed to treatment planning system (TPS) for dose calculation and also kept in proper tabular manner for clinical use. Results: Couch and collimator parameters were found to comply the tolerance criteria. Source strength of 172.2 roentgen per minute at 1 meter (RMM) was measured with an absolute dose rate of 225.76 cGy/min at dmax for 10cm x 10cm field size at normal treatment distance (NTD). Shutter timer error of 0.004 min was measured and incorporated in the clinical data. A maximum of 3.66 % variation was noted for 300 (15W × 20) physical wedge transmission factor between measured and vendor specified value. Radiation leakage through beam limiting device (BLD) and outside BLD were found to be within the limits prescribed by AERB. Conclusion: Commissioning is a prerequisite process after installation of a radiation therapy machine for medical purpose. Bhabhatron-II machine has several advantages over other telecobalt machine. Features like high source storage capacity of machine head, one pair of asymmetric jaw, closure of jaws to 0 cm x 0 cm during radiation emergency and presence of one motorized wedge filter makes it unique and yet cost effective telecobalt machine..

Design of Control System of Four Split Line Rotor Lift Deicer

This article is mainly aimed at the work high above the staff of four split line deicing machine installation layout and design, general time of deicing machine up and down time are subject to various restrictions, and when working at height, height is too high, most of the work high above the transported by only workers with a rope tied pull up on hand to transport, and the people standing on high strenuous exercise is extremely unsafe, in order to solve this problem we have invented a uav dynamic rotor based on helicopters, so as to solve the above problem.

Implantação de Um Novo Layout Produtivo em Uma Empresa do Setor de Lubrificantes e Desengraxantes

Em meio a um cenário altamente competitivo entre as empresas, qualquer redução de custo torna-se fundamental para a sobrevivência. Um dos principais pontos que pode ser analisado e melhorado é o layout, que engloba desde a disposição das máquinas, dos equipamentos, dos estoques, até as áreas de circulação. Este artigo visa organizar, melhorar e aperfeiçoar o arranjo físico de uma empresa de lubrificantes e desengraxantes. A metodologia utilizada foi a uma pesquisa de campo, levantamento do layout atual, a elaboração de projetos em formato 2D e 3D para identificar o tempo de produção e movimentação por meio comparativo e o estoque de matéria-prima. Os resultados apresentaram redução de 51,19% no tempo de produção e movimentação, reduzindo o gargalo produtivo, a mudança do layout atual e proposto evidenciou-se significativas alterações como aproximação dos equipamentos, o uso racional do espaço de manufatura dos lubrificantes e desengraxantes industriais, administrativo e organização do estoque.

Abstract P1-02-01: Improvement of breast cancer screening access and quality in an underserved population through system interventions

Abstract Background: Differences in access to and quality of screening and treatment are proposed to contribute to racial disparities in breast cancer outcomes. Interventions designed to improve mammography access and quality encompass strategies at the individual patient, healthcare provider, and system levels. In 2016, an urban safety net healthcare system based in Chicago implemented several changes in response to collected data showing variations in quality at institutions performing mammography. These changes included the installation of digital machines at one of four sites, centralizing reading of images from all four sites to a single site with radiologists specialized in mammography and increasing care coordination including enhanced patient outreach efforts. We examined the impact of these systems-based interventions on the access to and quality of mammography services. Methods: Data was obtained on 15,918 screening mammograms performed across four mammography centers within the Cook County Health & Hospitals System from the six months prior to and one year after implementation of changes. Manual chart abstraction was performed for each study that was assessed as BIRADS 0 (Breast Imaging and Reporting Data System), meaning an incomplete study requiring additional imaging evaluation, or mammograms that appeared suspicious or highly suspicious and categorized as BIRADS 4 or 5. Screening mammogram volume at each site was recorded and compared. Quality of screening mammograms was assessed using eleven metrics reflecting radiologist performance and efficiency of facility care processes. These metrics included the rate of recall, cancer detection rate, proportion of cancers that were early stage or minimal in size, proportion of women with timely follow-up imaging and biopsy, and rates of loss to follow-up. Results: The volume of screening mammograms completed at each of the four sites increased from the six months prior to intervention to the six months after (range of 61-322% increase). At one-year post intervention, there were smaller, but sustained increases in volume (range of 12-70% increase). Improvements were seen in at least one quality metric at each site in the post-intervention period (range 1-8). The proportion of women with timely follow-up after abnormal mammogram also improved across all four sites: from 38% getting follow-up imaging within 30 days pre-intervention to 68% after, and from 62% to 75% of women with biopsy completion within 60 days. Rate of cancer detection improved at two of the sites with the lowest pre-intervention values, from 1.7 to 3.1 and 2.8 to 5.7 per 1,000 mammograms (quality benchmark: 3-10/1,000 screening tests). Conclusion: Improvements in access to and quality of screening mammography demonstrate the value of implementing system level changes in enhancing breast cancer care and may translate to better outcomes for all women. Citation Format: Manst DJ, Gil D, Marcus EA, Mullarkey P, Ganschow PS. Improvement of breast cancer screening access and quality in an underserved population through system interventions [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-02-01.

Experimental Approach to Active Mounts Using Electromagnetic Actuator and Rubber with Consideration of Shock Resistance for Naval Shipboard Equipment

There is demand for stringent vibration isolation within machine installations in order to achieve maximum performance or to satisfy otherwise extreme criteria, particularly, when there is a strong source of vibration such as a motor pump. It is frequently necessary to prevent the transmission of these vibrations to other parts of the system for passenger comfort in vehicles, ships, trains, etc., or for the protection of delicate electronic equipment. In the defense sector, the need for equipment which is better at avoiding detection has led researchers to focus more on improving vibration isolation. In this paper, an active mount combined with a passive rubber mount and an electromagnetic actuator is proposed and examined for use in naval shipboard equipment. The electromagnetic actuator is suggested for improving performance and overcoming its inherent limitations which are caused by the friction between the magnet and coil. The design specifications of an active mount, such as required force, displacement, and frequency characteristics, are identified for the self‐excited pump system, and then an electromagnetic actuator active mount is redesigned with considering the shape of the passive rubber mount and shock resistance. The performance was examined on the single active mount using an external exciter, which could be simplified as two‐degree‐of‐freedom system, and also confirmed experimentally on an active mount system with four mounts using a motor system. From the results of applying the proposed electromagnetic active mount, a vibration reduction of about 20 dB for the motor equipment was observed for the excited frequency components of 1,600 rpm and its two harmonic components.

Tác động của văn hóa doanh nghiệp và quản trị chất lượng đến hiệu quả dự án tại các công ty lắp máy ở khu vực miền Trung

The success of many researchers at home and abroad, corporate culture has been studied since 1992 with the first concept of group culture, to date under the influence of the whole. Globalization, corporate culture has been researched regularly in multinational companies called cultural management. The expansion of the new market in the field of machine installation has made a great development of LILAMA, this includes the contribution of Central Machine Installation Companies. This paper examines the relationship between corporate culture, comprehensive quality management and project efficiency in Central Machinery Installation Company of LILAMA where contractor projects have been awarded contracts with high-value contracts. Data collected from 251 employees of Central Machinery Installation Company by LILAMA were analyzed by using the structural equation model. The results show that corporate culture and overall quality management have a direct impact on the project's effectiveness, thus setting out management measures that create a competitive advantage for Central Machinery Installation Company of LILAMA and apply to other enterprises in Vietnam.

КОСТНЫЕ АНАТОМИЧЕСКИЕ ОРИЕНТИРЫ ПРИ ПОСТАНОВКЕ ЭЛЕКТРОТОДОВ ДЛЯ СНЯТИЯ ЭКГ

The connection of the normal human anatomy theoretical material with practical skills in the professional activity of a doctor is presented in this article. This relationship is shown by the example of the bone : ' : of the human skeleton when setting up the electrodes for the ECG machine installation. The authors substantiated the need to organize educational research works among students of I-II courses of a medical university in order to better understand students of the fundamental nature of the material being studied for subsequent clinical disciplines

Study on the method of precision adjustment of star sensor

Star sensors are indispensable spatial measurement sensors for high-resolution earth observation and astronomical observations, and the demand for high measurement accuracy of satellite sensors continues to increase; thus, the star sensor optical machine adjustment error cannot be ignored. The commonly used installation error correction method cannot solely meet the precision analysis requirements. In this paper, the relationship between the optical machine installation and the star sensor measurement error is analyzed, and several common adjustment error correction methods are compared. An adjustment method for optical machines is proposed to meet the requirements of very high precision star sensors. The assembly precision requirements of the investigated very high precision star sensor are analyzed considering the whole machine, and then the optical components are controlled through optical precision adjustments to satisfy the precision requirements. Finally, through the complete machine calibration, the star sensor precision adjustment for an optical machine structure is verified. This method meets the requirements of very high precision sensors and is suitable for the precision adjustment of optical machine structures, which is of practical significance to improve the precision of star sensors.

Maximizing Output During Ramp by Integrating Capacity and Velocity

In the semi-conductor industry, factories ramp their production capacity in parallel with tool (machine) installations. Ramp capacity, and subsequently wafer starts, are aligned with additional installs of the most expensive tool. Subsequently, starts are set to the full capacity of that limiting toolset. In this paper, we argue that this may not be best method to maximize output over the ramp period and that by keeping ramp starts below constraint capacity, increased levels of cumulative output can be achieved for a desired planning horizon (e.g., the first year of production). A mathematical framework of the problem is provided to support our hypothesis, together with numerical examples and a set of simulation experiments.

Application of time-cost-quality-risk trade-off model in magnetic resonance imaging machine installation project

Effective project planning in Magnetic Resonance Imaging (MRI) machine installation takes into consideration several factors including Time, Cost, Quality and Risk which are essential but conflicting factors that affect projects. These critical factors should be optimized in all projects especially those in Low and Medium Income Countries (LMIC) with limited resources and inadequate investment in medical facilities and equipment. The main objective of this study was to develop an optimization model for fuzzy Time-Cost-Quality-Risk Trade-off (TCQRT) problem for MRI machine installation project. The model was solved by Multiobjective Genetic Algorithm (MOGA) and the solutions ranked using the Technique for the Order of Preferences by Similarity to Ideal Solution (TOPSIS). The results indicate a trade-off relationship exists among time, cost, quality and risks. Keywords: Time-Cost-Quality Trade-off Model, Magnetic Resonance Imaging, Multiobjective Genetic Algorithm

Radiation Protection Measures Taken In Designing Of The X-Ray Room And Installation Of The X-Ray Machines At The Departments Of Radiography Of Private Hospitals In The Municipal Area Of Kandy-Sri Lank

Radiation Protection Measures Taken In Designing Of The X-Ray Room And Installation Of The X-Ray Machines At The Departments Of Radiography Of Private Hospitals In The Municipal Area Of Kandy-Sri Lank

Development of a Methodology for Condition-Based Maintenance in a Large-Scale Application Field

This paper describes a methodology, developed by the authors, for condition monitoring and diagnostics of several critical components in the large-scale applications with machines. For industry, the main target of condition monitoring is to prevent the machine stopping suddenly and thus avoid economic losses due to lack of production. Once the target is reached at a local level, usually through an R&D project, the extension to a large-scale market gives rise to new goals, such as low computational costs for analysis, easily interpretable results by local technicians, collection of data from worldwide machine installations, and the development of historical datasets to improve methodology, etc. This paper details an approach to condition monitoring, developed together with a multinational corporation, that covers all the critical points mentioned above.

Design of High Temperature Six-Phase Starter-Generator Embedded in Aerospace Engine

This paper examines the problem of the installation of the electric machine to the high pressure shaft to increase the electrification of aircraft engines and create More Electrical Engine. Different ways of synchronous generator integration in the aircraft engine by worldwide aircraft engines manufacturers was discussed. A new design of the high temperature synchronous generator mounted on high pressure shaft is proposed. To evaluate the effectiveness of synchronous generator the electromagnetic, thermal and mechanical calculations are made. High temperature synchronous generator cooling system was designed and system of mechanical decoupling of the stator at short circuits is proposed.

Impact of the System of Air Supply to a Milking Unit on Selected Parameters of Milking Machine Operation

Abstract Air is supplied to a milking machine installation most usually in a constant manner by supply of a small amount of air to a milking chamber of a claw or periodically to a connection pipe of a liner, which enables milk outflow to a milking pipe and improves stabilization of vacuum and limits its fluctuations. On the market of milking machines there is a new solution in the form of mouthpiece vented liners - impulseair®, where air is supplied constantly by a calibrated nozzle in the head of a liner. The objective of the paper was to analyse and assess the selected parameters of milking determined in a milking machine with a claw with fixed volume of a milking chamber (250 cm3) with mouthpiece vented liners in comparison to other solutions used for air supply in milking machines. Measurements were carried out in laboratory conditions with milking to the upper milk pipeline, at variable mass intensities of liquid flow (within 0-8 kg·min−1), for three penetrations of artificial teats (46, 48, 62 mm), at three values of the system vacuum (46, 48 and 50 kPa). A significant impact of the manner of air supply to a milking machine and remaining independent variables of an experiment on the selected milking parameters was proved with the use of a statistical analysis. It was found that a milking unit with mouthpiece vented liners, although it reduces average vacuum of suction [pss], at the same time it limits fluctuations of underpressure in the dp cycle.

Poster ‐ 28: Shielding of X‐ray Rooms in Ontario in the Absence of Best Practice

This poster will be strictly based on the Healing Arts Radiation Protection (HARP) Act, Regulation 543 under this Act (X‐ray Safety Code), and personal communication the presenting author has had. In Ontario, the process of approval of an X‐ray machine installation by the Director of the X‐ray Inspection Service (XRIS) follows a certain protocol. Initially, the applicant submits a series of forms, including recommended shielding amounts, in order to satisfy the law. This documentation is then transferred to a third‐party vendor (i.e. a professional engineer – P. Eng.) outsourced by the Ministry of Health and Long‐term Care (MOHLTC). The P.Eng. then evaluates the submitted documentation for appropriate fulfillment of the HARP Act and Reg. 543 requirements. If the P.Eng.'s evaluation of the documentation is to their satisfaction, the XRIS is then notified. Finally, the Director will then issue a letter of approval to install the equipment at the facility. The methodology required to be used by the P.Eng. in order to determine the required amounts of protective barriers, and recommended to be used by the applicant, is contained within Safety Code 20A. However, Safety Code 35 has replaced the obsolete Safety Code 20A document and employs best practices in shielding design. This talk will focus further on specific intentions and limitations of Safety Code 20A. Furthermore, this talk will discuss the definition of the “practice of professional engineering” in Ontario. COMP members who are involved in shielding design are strongly encouraged to attend.

A genetic algorithm for a bi-objective mathematical model for dynamic virtual cell formation problem

Nowadays, with the increasing pressure of the competitive business environment and demand for diverse products, manufacturers are force to seek for solutions that reduce production costs and rise product quality. Cellular manufacturing system (CMS), as a means to this end, has been a point of attraction to both researchers and practitioners. Limitations of cell formation problem (CFP), as one of important topics in CMS, have led to the introduction of virtual CMS (VCMS). This research addresses a bi-objective dynamic virtual cell formation problem (DVCFP) with the objective of finding the optimal formation of cells, considering the material handling costs, fixed machine installation costs and variable production costs of machines and workforce. Furthermore, we consider different skills on different machines in workforce assignment in a multi-period planning horizon. The bi-objective model is transformed to a single-objective fuzzy goal programming model and to show its performance; numerical examples are solved using the LINGO software. In addition, genetic algorithm (GA) is customized to tackle large-scale instances of the problems to show the performance of the solution method.

Анализ и моделирование системы непрерывной подачи жидкой стали на установках МНЛЗ

Анализ и моделирование системы непрерывной подачи жидкой стали на установках МНЛЗ