Displaying publications 1 - 20 of 36 in total

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  1. Resource Allocation Schemes for 5G Network: A Systematic Review
    Kamal MA, Raza HW, Alam MM, Su'ud MM, Sajak ABAB
    Sensors (Basel), 2021 Oct 02;21(19).
    PMID: 34640908 DOI: 10.3390/s21196588
    Fifth-generation (5G) communication technology is intended to offer higher data rates, outstanding user exposure, lower power consumption, and extremely short latency. Such cellular networks will implement a diverse multi-layer model comprising device-to-device networks, macro-cells, and different categories of small cells to assist customers with desired quality-of-service (QoS). This multi-layer model affects several studies that confront utilizing interference management and resource allocation in 5G networks. With the growing need for cellular service and the limited resources to provide it, capably handling network traffic and operation has become a problem of resource distribution. One of the utmost serious problems is to alleviate the jamming in the network in support of having a better QoS. However, although a limited number of review papers have been written on resource distribution, no review papers have been written specifically on 5G resource allocation. Hence, this article analyzes the issue of resource allocation by classifying the various resource allocation schemes in 5G that have been reported in the literature and assessing their ability to enhance service quality. This survey bases its discussion on the metrics that are used to evaluate network performance. After consideration of the current evidence on resource allocation methods in 5G, the review hopes to empower scholars by suggesting future research areas on which to focus.
    Matched MeSH terms: Resource Allocation*
  2. Fulltext Dynamic resource allocation in hybrid access femtocell network
    Ahmed AU, Islam MT, Ismail M, Ghanbarisabagh M
    ScientificWorldJournal, 2014;2014:539720.
    PMID: 24782662 DOI: 10.1155/2014/539720
    Intercell interference is one of the most challenging issues in femtocell deployment under the coverage of existing macrocell. Allocation of resources between femtocell and macrocell is essential to counter the effects of interference in dense femtocell networks. Advances in resource management strategies have improved the control mechanism for interference reduction at lower node density, but most of them are ineffective at higher node density. In this paper, a dynamic resource allocation management algorithm (DRAMA) for spectrum shared hybrid access OFDMA femtocell network is proposed. To reduce the macro-femto-tier interference and to improve the quality of service, the proposed algorithm features a dynamic resource allocation scheme by controlling them both centrally and locally. The proposed scheme focuses on Femtocell Access Point (FAP) owners' satisfaction and allows maximum utilization of available resources based on congestion in the network. A simulation environment is developed to study the quantitative performance of DRAMA in hybrid access-control femtocell network and compare it to closed and open access mechanisms. The performance analysis shows that higher number of random users gets connected to the FAP without compromising FAP owners' satisfaction allowing the macrocell to offload a large number of users in a dense heterogeneous network.
    Matched MeSH terms: Resource Allocation*
  3. Fulltext An enhanced dynamic transmission opportunity scheme to support varying traffic load over wireless campus networks
    May Z, Alam MK, Husain K, Hasan MK
    PLoS One, 2020;15(8):e0238073.
    PMID: 32845901 DOI: 10.1371/journal.pone.0238073
    Transmission opportunity (TXOP) is a key factor to enable efficient channel bandwidth utilization over wireless campus networks (WCN) for interactive multimedia (IMM) applications. It facilitates in resource allocation for the similar categories of multiple packets transmission until the allocated time is expired. The static TXOP limits are defined for various categories of IMM traffics in the IEEE802.11e standard. Due to the variation of traffic load in WCN, the static TXOP limits are not sufficient enough to guarantee the quality of service (QoS) for IMM traffic flows. In order to address this issue, several existing works allocate the TXOP limits dynamically to ensure QoS for IMM traffics based on the current associated queue size and pre-setting threshold values. However, existing works do not take into account all the medium access control (MAC) overheads while estimating the current queue size which in turn is required for dynamic TXOP limits allocation. Hence, not considering MAC overhead appropriately results in inaccurate queue size estimation, thereby leading to inappropriate allocation of dynamic TXOP limits. In this article, an enhanced dynamic TXOP (EDTXOP) scheme is proposed that takes into account all the MAC overheads while estimating current queue size, thereby allocating appropriate dynamic TXOP limits within the pre-setting threshold values. In addition, the article presents an analytical estimation of the EDTXOP scheme to compute the dynamic TXOP limits for the current high priority traffic queues. Simulation results were carried out by varying traffic load in terms of packet size and packet arrival rate. The results show that the proposed EDTXOP scheme achieves the overall performance gains in the range of 4.41%-8.16%, 8.72%-11.15%, 14.43%-32% and 26.21%-50.85% for throughput, PDR, average ETE delay and average jitter, respectively when compared to the existing work. Hence, offering a better TXOP limit allocation solution than the rest.
    Matched MeSH terms: Resource Allocation
  4. Fulltext Directional slack-based measure for the inverse data envelopment analysis
    Mirsalehy A, Abu Bakar MR, Lee LS, Jaafar AB, Heydar M
    ScientificWorldJournal, 2014;2014:138923.
    PMID: 24883350 DOI: 10.1155/2014/138923
    A novel technique has been introduced in this research which lends its basis to the Directional Slack-Based Measure for the inverse Data Envelopment Analysis. In practice, the current research endeavors to elucidate the inverse directional slack-based measure model within a new production possibility set. On one occasion, there is a modification imposed on the output (input) quantities of an efficient decision making unit. In detail, the efficient decision making unit in this method was omitted from the present production possibility set but substituted by the considered efficient decision making unit while its input and output quantities were subsequently modified. The efficiency score of the entire DMUs will be retained in this approach. Also, there would be an improvement in the efficiency score. The proposed approach was investigated in this study with reference to a resource allocation problem. It is possible to simultaneously consider any upsurges (declines) of certain outputs associated with the efficient decision making unit. The significance of the represented model is accentuated by presenting numerical examples.
    Matched MeSH terms: Resource Allocation/methods*; Resource Allocation/statistics & numerical data
  5. Setting targets with interval data envelopment analysis models via Wang method
    Najmeh Malekmohammadi, Azmi Jaafar, Mansor Monsi
    Sains Malaysiana, 2010;39.
    Data envelopment analysis (DEA) is a mathematical programming for evaluating the relative efficiency of decision making units (DMUs). The first DEA model (CCR model) assumed for exact data, later some authors introduced the applications of DEA which the data was imprecise. In imprecise data envelopment analysis (IDEA) the data can be ordinal, interval and fuzzy. Data envelopment analysis also can be used for the future programming of organizations and the response of the different policies, which is related to the target setting and resource allocation. The existing target model that conveys performance based targets in line with the policy making scenarios was defined for exact data. In this paper we improved the model for imprecise data such as fuzzy, ordinal and interval data. To deal with imprecise data we first established an interval DEA model. We used one of the methods to convert fuzzy and ordinal data into the interval data. A numerical experiment is used to illustrate the application to our interval model.
    Matched MeSH terms: Resource Allocation
  6. Fulltext The mapping of spatial patterns of violent crime in peninsular Malaysia: normal mixture model approach
    Syerrina Zakaria, Nuzlinda Abdul Rahman
    Pertanika Journal of Science & Technology, 2015;23(2):207-222.
    MyJurnal
    The objective of this study was to explore the geographic distribution and temporal patterns of violent crime cases in Peninsular Malaysia by using the tools and techniques for spatial analysis. This study will also provide a general picture of violent crime patterns in Malaysia. The unit of analysis is district and the violent crime data from the year 2000 until 2009 were used in this study. In order to obtain the optimum number of components of crime in the space-time period, the space-time Normal Mixture Models were used. Based on the results of this model, the mapping of the crime occurrences was made. This map displays the spatial distribution of crime occurrence in 82 districts of Peninsular Malaysia. From this analysis, more violent crimes were shown to have occurred in developed states such as Selangor, Wilayah Persekutuan Kuala Lumpur and Johor. The findings of this study could be used by policy makers or responsible agencies to take any relevant actions in terms of crime prevention, human resource allocation and law enforcement so as to overcome this important issue in future.
    Matched MeSH terms: Resource Allocation
  7. Technical efficiency and its influencing factors in Malaysian hospital pharmacy services
    Hamzah NM, See KF
    Health Care Manag Sci, 2019 Sep;22(3):462-474.
    PMID: 30868325 DOI: 10.1007/s10729-019-09470-8
    Various pharmacy services are offered in public health facilities, ranging from distributive activities (dispensing) to patient-oriented services (pharmaceutical care). These activities are monitored through indicators established at the national level. In Malaysia, the indicators have not been transformed into a measurement of hospital pharmacy service efficiency. The main objectives of this study were to assess the relative performance of hospital pharmacy services and to investigate the factors that may affect the performance levels. Double-bootstrap data envelopment analysis was applied to measure the technical efficiency levels of 124 public hospital pharmacies in 2014. An input-oriented variable returns to scale model was adopted in the study, while bootstrap truncated regression was conducted to identify the factors that may explain the differences in the efficiency levels. The average bias-corrected technical efficiency score varies according to the hospital size (0.84, 0.78 and 0.82 in small, medium and large hospitals, respectively). The hospital size, hospital age, urban location and information technology are important determinants of the efficiency levels. The study contributes to establishing baseline technical efficiency information for public hospital pharmacy services in Malaysia. The measurement of hospital pharmacy efficiency can guide future policy making to improve performance and ensure the optimum level of available resources.
    Matched MeSH terms: Resource Allocation
  8. Fulltext A survey of middleware for sensor and network virtualization
    Khalid Z, Fisal N, Rozaini M
    Sensors (Basel), 2014;14(12):24046-97.
    PMID: 25615737 DOI: 10.3390/s141224046
    Wireless Sensor Network (WSN) is leading to a new paradigm of Internet of Everything (IoE). WSNs have a wide range of applications but are usually deployed in a particular application. However, the future of WSNs lies in the aggregation and allocation of resources, serving diverse applications. WSN virtualization by the middleware is an emerging concept that enables aggregation of multiple independent heterogeneous devices, networks, radios and software platforms; and enhancing application development. WSN virtualization, middleware can further be categorized into sensor virtualization and network virtualization. Middleware for WSN virtualization poses several challenges like efficient decoupling of networks, devices and software. In this paper efforts have been put forward to bring an overview of the previous and current middleware designs for WSN virtualization, the design goals, software architectures, abstracted services, testbeds and programming techniques. Furthermore, the paper also presents the proposed model, challenges and future opportunities for further research in the middleware designs for WSN virtualization.
    Matched MeSH terms: Resource Allocation
  9. Fulltext ‘Smartfan’ – An energy saving innovation for workplace
    Nur Jannah Azman, Wan Mohd Rizlan Wan Idris, Alice Shanthi
    Jurnal Inovasi Malaysia, 2019;2(2):111-122.
    MyJurnal
    Circular 10/2016 issued by UiTM Vice-Chancellor’s office comprises a clear guideline for 2017 Strategic Budget Planning. The guidelines can help the Head of PTJ’s to plan and take necessary cost effective measures to reduce on utility expenditure especially to counter the rising monthly electricity bills related to the use of air conditioners on campuses. Looking at the figures drawn from the energy management office in UiTM Negeri Sembilan Branch, UiTM Kuala Pilah campus has spent an average of RM153, 028.88 monthly in 2016. As of August 2016, the cost of electricity consumption in UiTM Kuala Pilah has reached RM1,224,231.03. This amount has surpassed the overall approved allocation of RM 800,000.00 for 2016 electricity bill. In order to reduce spending and encourage saving, as well as responding to the ‘Energy Savings Campaign’ held at the campus level, various efforts have been taken at the departmental levels. One of the innovative products that came about from the campaign is the ‘Smartfan’ project pioneered by the Physics and Materials Science Unit. The main objective of this project is the production of a “smartfan” or a mini air conditioner which is a simple, cost-effective and an energy saving device. In addition, products and ideas from the campaign can be piloted and taken to innovative, inventions and design contests at national and international levels.
    Matched MeSH terms: Resource Allocation
  10. Fulltext Spotted hyena optimizer algorithm for capacitor allocation in radial distribution system with distributed generation and microgrid operation considering different load types
    Naderipour A, Abdul-Malek Z, Hajivand M, Seifabad ZM, Farsi MA, Nowdeh SA, et al.
    Sci Rep, 2021 Feb 01;11(1):2728.
    PMID: 33526829 DOI: 10.1038/s41598-021-82440-9
    In this paper, the optimal allocation of constant and switchable capacitors is presented simultaneously in two operation modes, grid-connected and islanded, for a microgrid. Different load levels are considered by employing non-dispatchable distributed generations. The objective function includes minimising the energy losses cost, the cost of peak power losses, and the cost of the capacitor. The optimization problem is solved using the spotted hyena optimizer (SHO) algorithm to determine the optimal size and location of capacitors, considering different loading levels and the two operation modes. In this study, a three-level load and various types of loads, including constant power, constant current, and constant impedance are considered. The proposed method is implemented on a 24-bus radial distribution network. To evaluate the performance of the SHO, the results are compared with GWO and the genetic algorithm (GA). The simulation results demonstrate the superior performance of the SHO in reducing the cost of losses and improving the voltage profile during injection and non-injection of reactive power by distributed generations in two operation modes. The total cost and net saving values for DGs only with the capability of active power injection is achieved 105,780 $ and 100,560.54 $, respectively and for DGs with the capability of active and reactive power injection is obtained 89,568 $ and 76,850.46 $, respectively using the SHO. The proposed method has achieved more annual net savings due to the lower cost of losses than other optimization methods.
    Matched MeSH terms: Resource Allocation
  11. Fulltext Approaches in methodology of a population-based study in Malaysia: the national health and morbidity survey 2011 (NHMS 2011)
    Fadhli, Y., Azaadi, O., Noor Ani, A., Balkish, M.N., Ahmad Jessree, K., Tahir, A.
    Malaysian Journal of Medicine and Health Sciences, 2013;9(2):25-33.
    MyJurnal
    The National Health and Morbidity Survey 2011 was a nationally representative household survey of non-institutionalized Malaysian population who were residing in Malaysia for at least 2 weeks prior to data collection. The aim of the survey was to provide health related community–based data and information to support Ministry of Health, Malaysia, in reviewing health priorities, programme strategies and activities, and planning for allocation of resources. There were twelve research scopes included in the survey. The sample size was calculated based on the requirement for each scope. A two-stage stratified sampling was adopted in the survey. The methods for data collection were via the questionnaire, clinical examination, and biochemical analysis. Quality controls were also instituted to ensure collection of high quality data. The National Health and Morbidity Survey 2011 (NHMS 2011) adopted an appropriate methodology for a population survey and all the necessary steps were taken to ensure valid and reliable findings.
    Study name: National Health and Morbidity Survey (NHMS-2011)
    Matched MeSH terms: Resource Allocation
  12. Fulltext Conducting research that is both ethical and responsive to the health needs of a developing country
    Mak JW
    International e-Journal of Science, Medicine & Education, 2014;8(1):19-23.
    MyJurnal
    There is no substantial difference in conducting research that is both ethical and responsive to the health needs in developing and developed nations. Differences are in financial constraints, technological expertise in identification and addressing needs, and in the perception of equal partnership of all stakeholders. There will be differences in emphasis of research but this is slowly blurred due to globalisation. Public health emergencies in developing countries need timely and effective global collaborative research to implement control strategies. Research needs should be based on predictive models with learning from past emergencies, technological advances, strategic critical appraisal of local and global health information, and dialogue with all stakeholders. Adequate funding will be challenging and resources from national, international and aid
    foundations will be needed. Issues associated with such funding include deployment of international rapid response teams, collaborating researchers, transfer of technology, and intellectual property ownership. While all types of research ranging from basic, applied, clinical
    studies, meta-analysis, and translational research are relevant, the relative importance and specific allocation of resources to these may differ. Is the choice related to responsiveness or based on researchers’ perception of their contributions to evidence-based practice and research? Ethical issues relating to vulnerable groups, risk distribution, quality issues, research integrity and oversight are just as important. Internationally funded
    research including clinical trials must be sensitive to such issues to avoid allegations of exploitation. Thus the potential of utilisation and buy-in of research findings and recommendations must be considered.
    Matched MeSH terms: Resource Allocation
  13. Fulltext Healthcare inequalities: the United States vs India
    Mohamad Nasaruddin Mahdzir, Izwan Effendy Zainuddin, Sharifa Ezat Wan Puteh
    Int J Public Health Res, 2012;2(2):177-183.
    MyJurnal
    The relationship between healthcare services and inequalities is more likely when a group that shares a salient identity faces severe inequalities of various kinds. Such inequalities may be catalyzed by economic, social, political or concern cultural status. The objectives of this review are to identify the issues and challenges involve in healthcare inequalities, to compare factors contributes to healthcare inequalities and to purpose suggestions and recommendations for improvement based on issues and challenges between United States and India. Comparing annual year healthcare report, documentation of healthcare institutional, Ministry of Health's report and circular, official institutional website, scientific healthcare journals, articles and reports published in 1994 until 2011 regarding healthcare inequalities between United States and India. Health inequalities in the healthcare system contributed by the different in socioeconomic status and accessibility to the healthcare facility due to high cost of treatment has been common risk 'Catastrophic' factors to the inequalities in both countries. Health financing system and resource allocation that benefit only the upper class social spectrum of the population. Disparities occur due to the imbalance in distribution of wealth, discrimination and change in the world economy. Adapting healthcare system that provides care to all classes of people need improvement as no healthcare system is perfect. This matter must be tackle urgently as it's a matter of national concern.
    Matched MeSH terms: Resource Allocation
  14. Fulltext The policy effect of green finance reform and innovations: Empirical evidence at the firm level
    Dong H, Tao M
    PLoS One, 2022;17(12):e0278128.
    PMID: 36454765 DOI: 10.1371/journal.pone.0278128
    The Chinese central government established eight pilot zones in five provinces for green finance reform and innovations (GFRI) in 2017. The pilot zones promote green finance development and explore the propagable and reproducible experiences regarding mechanisms and institutions. Adopting a sample of China's listed companies from 2012 to 2021, this paper constructed a quasi-natural experiment and investigated the GFRI policy's effect on firms' total factor productivity (TFP) using the difference-in-differences (DID) method to verify the implementation effect of the GFRI policy. Furthermore, heterogeneity analysis and mechanism analysis were conducted to identify the guidance effect and deep mechanisms of the GFRI policy. The empirical results demonstrated that firms' TFP in pilot zones increased substantially after implementing the GFRI pilot policy, confirming that the policy had a strong incentive effect. The corresponding promoting effect was particularly significant for non-state-owned companies, the eastern and central regions, and firms in the growth stage. Further mechanism analysis revealed that the GFRI pilot policy can stimulated firms' TFP by promoting technological innovation and improving resource allocation efficiency. This paper's empirical findings are essential in improving relevant policies and expanding the pilot zones.
    Matched MeSH terms: Resource Allocation
  15. Ethical dilemmas related to predictions and warnings of impending natural disaster
    Phua KL, Hue JW
    Am J Disaster Med, 2013;8(4):243-52.
    PMID: 24481888 DOI: 10.5055/ajdm.2013.0130
    Scientists and policy makers issuing predictions and warnings of impending natural disaster are faced with two major challenges, that is, failure to warn and issuing a false alarm. The consequences of failure to warn can be serious for society overall, for example, significant economic losses, heavy infrastructure and environmental damage, large number of human casualties, and social disruption. Failure to warn can also have serious for specific individuals, for example, legal proceedings against disaster research scientists, as in the L'Aquila earthquake affair. The consequences of false alarms may be less serious. Nevertheless, false alarms may violate the principle of nonmaleficence (do no harm), affect individual autonomy (eg, mandatory evacuations), and may result in the "cry wolf" effect. Other ethical issues associated with natural disasters include the promotion of global justice through international predisaster technical assistance and postdisaster aid. Social justice within a particular country is promoted through greater postdisaster aid allocation to the less privileged.
    Matched MeSH terms: Resource Allocation/ethics
  16. Fulltext Ethical issues related to epilepsy care in the developing world
    Tan CT, Avanzini G
    Epilepsia, 2009 May;50(5):975-7.
    PMID: 19170738 DOI: 10.1111/j.1528-1167.2008.01934.x
    There are three major issues of ethical concern related to epilepsy care in the developing world. First, is it ethical for a developing country to channel its limited resources from direct epilepsy care to research? The main considerations in addressing this question are the particular research questions to be addressed and whether such research will bring direct benefits to the local community. Second, in a country with limited resources, when does ignoring the high treatment gap become an ethical issue? This question is of particular concern when the community has enough resources to afford treatment for its poor, yet is not providing such care because of gross wastage and misallocation of the national resources. Third, do countries with plentiful resources have an ethical responsibility to help relieve the high epilepsy treatment gap of poor countries? Indeed, we believe that reasonable health care is a basic human right, and that human rights transcend national boundaries. Although health care is usually the responsibility of the nation-state, many modern states in the developing world are arbitrary creations of colonization. There is often a long process from the establishment of a political-legal state to a mature functional nation. During the long process of nation building, help from neighboring countries is often required.
    Matched MeSH terms: Resource Allocation/ethics
  17. Development of an MCDA Framework for Rare Disease Reimbursement Prioritization in Malaysia
    Ku Abd Rahim KN, Muhammad Lattepi N, Sarimin R, Foo SS, Akmal S, Lee SW, et al.
    Int J Technol Assess Health Care, 2024 Sep 04.
    PMID: 39228212 DOI: 10.1017/S026646232400031X
    Matched MeSH terms: Resource Allocation/economics
  18. Informed consent in Malaysia: an overview
    Che Ngah A
    J Int Bioethique, 2005 Mar-Jun;16(1-2):143-61, 199.
    PMID: 16637139 DOI: 10.3917/jib.161.0143
    The right of a person to control his body is a concept that has long been recognized in Malaysia under the law of torts. The purpose of requiring informed consent is to preserve that right in medical decision-making. Informed Consent is a relatively new concept in medical litigation cases. However in the late 1990's, it has become one of the important claims under negligence made against the doctor for failure to disclose relevant information to patients in respect of the treatment proposed. Whether Malaysia has begun to recognize patient's right to decision-making is yet to be seen. Furthermore the social-cultural relationship between doctors and patients had to be considered. In this respect, the researcher had conducted interviews with doctors and patients to gauge their reaction towards a shared process of decision-making, which is the central issue in the doctrine of informed consent. Findings suggest that in society where primary health care is the main thrust to achieve health for all, the possibility of recognition of the rights of patients to receive information before making decisions about treatment appears remote. The findings also underscore the importance of incorporating aspects of informed consent as part of providing quality service to patients.
    Matched MeSH terms: Resource Allocation
  19. Fulltext Genomics and health: ethical, legal and social implications for developing countries
    Chee HL
    Issues Med Ethics, 2002 Jan-Mar;10(1):146-9.
    PMID: 16334919
    Matched MeSH terms: Resource Allocation
  20. Fulltext Impact of the Coronavirus Disease 2019 Pandemic on an Emergency Department Service: Experience at the Largest Tertiary Center in Taiwan
    Tsai LH, Chien CY, Chen CB, Chaou CH, Ng CJ, Lo MY, et al.
    Risk Manag Healthc Policy, 2021;14:771-777.
    PMID: 33654444 DOI: 10.2147/RMHP.S272234
    Purpose: Severe Acute Respiratory Syndrome coronavirus 2 (SARS-CoV-2) is an emerging contagious pathogen that has caused community and nosocomial infections in many countries. This study aimed to evaluate the impact of Coronavirus disease 2019 (COVID-19) on emergency services of the largest medical center in Taiwan by comparing emergency department (ED) usage, turnover, and admission rates before the COVID-19 outbreak with those during the outbreak.

    Materials and Methods: A retrospective cohort study was conducted in the ED of the largest tertiary medical center in Taiwan. Trends of adult, non-trauma patients who visited the ED during February-April 2019 were compared with those during February-April 2020. The number of visits, their dispositions, crowding parameters, and turnover rates were analyzed. The primary outcome was the change in ED attendance between the two periods. The secondary outcomes were changes in hospital admission rates, crowding parameters, and turnover rates.

    Results: During the outbreak, there were decreased non-trauma ED visits by 33.45% (p < 0.001) and proportion of Taiwan Triage and Acuity Scale (TTAS) 3 patients (p=0.02), with increased admission rates by 4.7% (p < 0.001). Crowding parameters and turnover rate showed significant improvements.

    Conclusion: Comparison of periods before and during the COVID-19 outbreak showed an obvious decline in adult, non-trauma ED visits. The reduction in TTAS 3 patient visits and the increased hospital admission rates provide references for future public-health policy-making to optimise emergency medical resource allocations globally.

    Matched MeSH terms: Resource Allocation
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