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关键词： Digital-to-analog converter (DAC)   switched capacitor   organic light emitting diode (OLED)   linearity  

摘要： This work proposes a new OLED driver architecture with 10-bit segmented DAC and switched capacitor multiply-by-two circuit application. A 30-channel 10-bit switched capacitor driver chip prototype is implemented in 0.18-pm CMOS technology. In this architecture, the achieved output range is 1.5-4.8 V for an input range of 1.5-3.15 V, which is suitable for OLED driver with different colors. This architecture is not only converting the digital input signal to analog output for the display panel but also giving amplified high output voltage range. In the segmented DAC, 6-bit coarse DAC and 4-bit fine DAC are used for the input voltage range 1.5-3.15 V. In a conventional RDAC for the output voltage of 4.8 V, it requires 2(14) switches i.e., 14-bit RDAC for the same resolution. Hence, conventional RDAC driver is four times larger than the proposed innovative very compact and high speed 10-bit segmented DAC switched capacitor OLED driver. The new architecture drastically reduces the number of switches and complex metal routing which results in reduced power consumption and good settling time. In the proposed OLED driver, no extra buffer is required as switched capacitor op-amp is applied for the same purpose with a gain of more than one. This high-resolution design with small die area also improves the linearity and uniformity with low-power consumption. The post-simulated results show that the OLED driver exhibits the maximum DNL and INL of 0.03 LSB and -0.06 LSB, respectively, with an LSB voltage of 3 mV. The one-channel area is 0.586 mm x 0.017 mm and the settling time is 4.25 mu s for 30 k Omega and 30 pF driving load.

关键词： Performance   Finance   Service quality   Ghana   PLS-SEM   Health-care facilities management  

摘要： Purpose With rising health-care costs and the financial constraints in most developing countries, prioritization of needs have become an issue of strategic importance in public hospitals. As a result, there is the intense competition of scare resources between core health care and non-core facilities management (FM) services. Given that financial resources are needed to facilitate the smooth operation of the FM department, this paper aims to investigate the direct and indirect effects of finance on the relationship between service quality and performance of hospital FM services. Design/methodology/approach The paper adopts a quantitative approach following a general questionnaire survey which was conducted on the research population. Partial least squares structural equation modelling was used to investigate the relationships between service quality and performance of hospital FM services. Findings The study highlights the relevance of service quality to improving FM performance and demonstrate the direct and indirect influence of finance to ensure quality FM services delivery to improve core health care outcomes in hospitals. Practical implications The result of this study should motivate hospital management to prioritize attention on FM in scare resources management in public hospitals to create and maintain a decent health-care environment for better health outcomes. Further, managerial commitment to facilitate employee training, empowerment, incentives, awards and compensation should be strengthened in the quest of ensuring quality services delivery. Originality/value The paper extends knowledge by mediating the influence of finance on the relationship between service quality and FM performance. Proposes a parsimonious financial mediation framework which can easily be adaptable to several developing countries health-care FM management.

关键词： SERVQUAL   Service quality   Facility management   User satisfaction   FM   Shopping malls  

摘要： Purpose This study aims to assess the satisfaction of users with outsourced facility management (FM) services in multi-tenant shopping malls (SMs) in Accra, Ghana. Design/methodology/approach This study measured user satisfaction (US) with 15 FM services using the perception of internal users about the attitude and courtesy of the personnel who provide the services, the reliability of the services, their responsiveness and their competence. This study used survey data from 117 users who have actively used these services for at least 12 months using structured questionnaires. The data was descriptively analysed to assess the perceived satisfaction of the users in five SMs. Findings The results showed that users were satisfied with the delivery of all 15 services (each had a mean above 3.0 which is the benchmark satisfaction point). The findings also showed high levels of service quality with the four dimensions of satisfaction investigated. Originality/value This study demonstrates US with outsourced FM services for multi-tenant SMs in Ghana. Practically, property owners, potential investors and other stakeholders can rely on the findings for effective FM strategy decision-making. Facility managers can rely on these findings to review their service delivery for the better.

关键词： Summer schools   International students   Urban facilities management   Case studies   Education  

摘要： Purpose The purpose of this paper is to investigate how an Urban Facilities Management (Urban FM) focused summer school in Norway in 2019 impacted knowledge creation, as well as the host and foreign educators, along with the international student participants. Design/methodology/approach This paper's data collection is formed as a "post-event study" using interviews and a quantitative survey from both the students and educators to look at the impact of the summer school on the student and the associated educational programs. Findings The outcomes of this study indicate that the impact on educators and their educational programs was substantial with regard to their teaching experiences. The study confirmed that foreign experience allowed not just for greater potential for cross institution cooperation for the future but also allowed for the usage of the summer school case studies in host and guest educational programs. For the students, the added value was in the international experience primarily and a chance to study on a case study project. The study was also successful in the dissemination of Urban FM knowledge. Originality/value This paper also offers added theoretical value in the development of a model in future projects on how to capitalize on the potential impact of the summer school on educators and students. The possibilities for increased dissemination and knowledge creation in Urban FM is also significant.

关键词： Facilities management supply chain   Hotels   Facilities management supply chain processes   Performance evaluation  

摘要： Purpose The performance of the facilities management supply chain (FMSC) in the hotel sector is challenged by the diverse nature of parties involved, their relationships and the flows of services and products. Although performance measurement systems have been endorsed by researchers worldwide as a mechanism to evaluate and improve performance, there seems lack of mechanisms to evaluate the FMSC performance in hotels. Hence, this paper aims to develop a framework that would enable to evaluate FMSC performance in hotels. Design/methodology/approach A case study strategy was used, where 3 five-star hotels in Sri Lanka were studied for the purpose. The data was collected through semi-structured interviews conducted with 21 professionals involved in FMSC and through document reviews. A content analysis was performed and the framework was developed. This was validated with 3 subject matter experts in the field. Findings The study findings revealed that the FMSC process is different from manufacturing and service supply chain (SC) processes as it comprises both product and service elements and incorporates internal, as well as external customers. The developed FMSC process comprises seven sub-processes as follows: delivery of products, delivery of services, sourcing, make/fulfil, delivery of FM services and products, receipt of FM services and receipt of products by customers. Based on the derived FMSC process and the key activities, 38 key performance indicators were developed and used in the framework to evaluate the performance of FMSC. Originality/value The developed performance evaluation framework is expected to facilitate performance measurement of the SC and enhance its performance. Further, it would enhance cooperation among FMSC partners and assist in achieving FMSC excellence.

关键词： Building information modeling (BIM)   Facilities management (FM)   BIM-FM integration   Capital improvement planning   Large capital projects   Operations and maintenance (O&M)  

摘要： Purpose This paper aims to present a review of research developments relating to the application of building information modeling (BIM) to facilities management (FM). It sheds light on major technical and organizational issues with the view of identifying how existing BIM for FM knowledge applies to large capital projects. Design/methodology/approach The study adopted a literature search approach to retrieve relevant articles which were subjected to keyword analysis to enable categorization of extant BIM for FM research into appropriate sub-domains. A qualitative analysis of 94 BIM for FM-related literature was carried out in addition to a review of 9 capital project-related articles, leading to the establishment of research trends, gaps and future directions. Findings The review found that research in the BIM-FM integration field is predominantly technology and process-oriented, with less attention paid to people or organizational aspects. Therefore, there is a need for expanding the knowledge base in this direction. Several future research directions were identified to lay the foundations for research on BIM application to FM in large capital projects and other application areas for interested researchers. These future directions were categorized under the identified sub-domains of the field and mapped onto two generic activities, i.e. technical integration and business integration, involved in technology adoption by organizations. Originality/value The main contribution of this study is the categorization of existing research on BIM for FM, leading to the identification of research gaps concerning the initiation and implementation of BIM for FM in large capital projects. As a secondary benefit, this study has validated some sub-domains of the BIM for the FM research field identified in previous review papers using an empirical approach. This validation of defined sub-domains is useful for an emerging research field as it provides a common understanding of trends

标准号: DB4413/T 26-2022

关键词： 火力发电厂   机电设备   点检模式  

摘要： 机电设备作为火力发电厂安全运行的重要保障,理应予以密切关注,提高火电厂运维管理的有效性.因此,本文简要分析火力发电厂机电设备管理与维护的必要性,并围绕管理与维护问题,经由实施设备点检模式、落实奖惩责任制度、推行状态检修技术、加强设备安全管理、制定有针对性的维护计划等对策,以提高管理与维护水平,为火电厂发电事业的发展奠定基础.