Forced oscillation in power systems with converter controlled-based resources- a survey with case studies

In future power systems, conventional synchronous generators will be replaced by converter controlled-based generations (CCGs), i.e., wind and solar generations, and battery energy storage systems. Thus, the paradigm shift in power systems will lead to the inferior system strength and inertia scarcity. Therefore, the problems of forced oscillation (FO) will emerge with new features of the CCGs. The state-of-the-art review in this paper emphasizes previous strategies for FO detection, source identification, and mitigation. Moreover, the effect of FO is investigated in a power system with CCGs. In its conclusion, this paper also highlights important findings and provides suggestions for subsequent research in this important topic of future power systems. © 2013 IEEE

Renewable hydrogen potential for low-carbon retrofit of the building stocks

Energy-related GHG emissions, mainly from fossil fuels combustion, account for around 70% of total emissions. Those emissions are the target of the recent sustainability policies. Indeed, renewables exploitation is considered widely the weapon to deal with this challenge thanks to their carbon neutrality. But, the biggest drawback is represented by the mismatching between their production and users consumption. The storage would be a possible solution, but its viability consists of economic sustainability and energy process efficiency as well. The cutting edge technologies of batteries have not still solved these issues at the same time. So, a paradigm shift towards the identification of an energy carrier as storage option, the so called Power-to-Gas, could be the viable solution. From viability to feasibility, a mandatory step is required: the opportunity to integrate the new solution in the proven infrastructures system. Thus, the recent studies on Hydrogen (H2) enrichment in Natural Gas, demonstrating a lower environmental impact and an increase in energy performance, are the base to build the hydrogen transition in the urban environment. The aim of this paper is to evaluate the environmental benefits at building and district scale

Toward a framework for data quality in cloud-based health information system

This Cloud computing is a promising platform for health information systems in order to reduce costs and improve accessibility. Cloud computing represents a shift away from computing being purchased as a product to be a service delivered over the Internet to customers. Cloud computing paradigm is becoming one of the popular IT infrastructures for facilitating Electronic Health Record (EHR) integration and sharing. EHR is defined as a repository of patient data in digital form. This record is stored and exchanged securely and accessible by different levels of authorized users. Its key purpose is to support the continuity of care, and allow the exchange and integration of medical information for a patient. However, this would not be achieved without ensuring the quality of data populated in the healthcare clouds as the data quality can have a great impact on the overall effectiveness of any system. The assurance of the quality of data used in healthcare systems is a pressing need to help the continuity and quality of care. Identification of data quality dimensions in healthcare clouds is a challenging issue as data quality of cloud-based health information systems arise some issues such as the appropriateness of use, and provenance. Some research proposed frameworks of the data quality dimensions without taking into consideration the nature of cloud-based healthcare systems. In this paper, we proposed an initial framework that fits the data quality attributes. This framework reflects the main elements of the cloud-based healthcare systems and the functionality of EHR

LAW DEVELOPMENT OF WAQF AL-NUQUD (CASH WAQF) TOWARDS ELECTRONIC WAQF (E-WAQF) BASED ON PUBLIC WELFARE

The modern era is identified with the era of the digital society. Every human activity will be driven through a series of digital technology. For example everything is electronic through the identification number Electronic Identity Card (E-ID), Card payment toll road electronic (E-Toll), ATM, PIN (Personal Identification number), etc. all using the digital system. No exception waqf management innovation has also been happening in Islamic countries including Kuwait, Qatar, Emirates, Jordan, Saudi Arabia, Egypt, Turkey, Bangladesh, Malaysia, Singapore, and even Europe and America. Among the endowments with a paradigm shift arrangements progressive approach fairly fundamental law, among others, first, in the case of an asset in waqf no longer confined to immovable property, but also against movable property. Evidence used to reinforce this view, as formulated in Article 16 Paragraph (1) of Law No. 41 of 2004 on endowments, which reads “ treasure be in waqf is immovable and moving objects”. This article aims to make an overview on the developing of law on waqf al-nuqud towards electronic waqf (e-waqf) to realize the public welfare.Keywords: Law Development; Waqf Al-nuqud; E-Waqf; Welfare

Resilience and risk analysis of fault-tolerant control design in continuous pharmaceutical manufacturing

PresentationThe effects of the paradigm shift from batch to continuous manufacturing on pharmaceutical industry, in terms of process safety and product quality, e.g., danger of dust explosions and risk of off-spec products, are of major concerns in the recent research progress in control system design. Specifically, a fault-tolerant control of critical process parameters (CPPs) and critical quality attributes (CQAs) is of paramount importance for the continuous operation with built-in safety and quality. In this study, a systematic framework for fault-tolerant control design, analysis, and evaluation for continuous pharmaceutical solid-dosage manufacturing is proposed, consisting of system identification, control design and analysis (controllability, stability, resilience, etc.), hierarchical three-layer control structures (model predictive control, state estimation, data reconciliation, etc.), risk mapping, assessment and planning (Risk MAP) strategies, and control performance evaluation. The key idea of the proposed framework is to identify the potential risks in the control design, material variance, and process uncertainties, under which the control strategies are evaluated. The framework is applied to a continuous direct compaction process, specifically the feeding-blending system wherein the major source of variance in the process operation and product quality arises. It can be demonstrated that the process operation failures and product quality variances in the feeding-blending system can be mitigated and managed through the proposed systematic fault-tolerant control system design and risk analysis framework

How to Identify Scientifc Revolutions?

Conceptualizing scientific revolutions by means of explicating their causes, their underlying structure and implications has been an important part of Kuhn's philosophy of science and belongs to its legacy. In this paper we show that such “explanatory concepts” of revolutions should be distinguished from a concept based on the identification criteria of scientific revolutions. The aim of this paper is to offer such a concept, and to show that it can be fruitfully used for a further elaboration of the explanatory conceptions of revolutions. On the one hand, our concept can be used to test the preciseness and accuracy of these conceptions, by examining to what extent their criteria fit revolutions as they are defined by our concept. On the other hand, our concept can serve as the basis on which these conceptions can be further specified. We will present four different explanatory concepts of revolutions – Kuhn's, Thagard's, Chen's and Barker's, and Laudan's – and point to the ways in which each of them can be further specified in view of our concept

Tracking profiles of genomic instability in spontaneous transformation and tumorigenesis

The dominant paradigm for cancer research focuses on the identification of specific genes for cancer causation and for the discovery of therapeutic targets. Alternatively, the current data emphasize the significance of karyotype heterogeneity in cancer progression over specific gene-based causes of cancer. Variability of a magnitude significant to shift cell populations from homogeneous diploid cells to a mosaic of structural and numerical chromosome alterations reflects the characteristic low-fidelity genome transfer of cancer cell populations. This transition marks the departure from micro-evolutionary gene-level change to macro-evolutionary change that facilitates the generation of many unique karyotypes within a cell population. Considering cancer cell populations to be complex-adaptive systems, multi-level analyses were performed longitudinally including whole genome microarray, population karyotype analysis, and determination of cell phenotype. As heterogeneity in ovarian cancer at each of these levels is linked to low survival, metastasis, and resistance to chemotherapy, a syngeinc model of spontaneous ovarian cancer development was employed. The significant findings of the current study are, 1) Genomic instability was apparent from the earliest stages of study, 2) Karyotypic heterogeneity was widespread, showed a pattern of expansion over time and preceded the acquisition of the transformed phenotype 3) a major karyotypic shift occurred between transformed cells in vivo and tumors formed in vitro, documenting the formation of a new system induced by environmental change 4) Chromosome copy number has greater impact on gene expression in early-stage cell populations, where karyotypes are beginning to depart from the diploid genome. A genome-centered paradigm for transformation is emphasized through the discovery of early large-scale increases in karyotype heterogeneity. This occurred well before the appearance of the transformed phenotype, arose much faster in Brca1 conditionally inactivated cells, was linked to the largest shift in gene expression, and was linked to the transition from in vitro to in vivo survival facilitating tumorigenesis. These data demonstrate the significance, methodologies and rationale for quantifying karyotype heterogeneity in transformation, tumorigenesis, and clinical cancers. Together, these findings support of a genome-centered evolutionary framework for cancer progression that emphasizes cell-to-cell genomic variability as the basis for macro-evolutionary selection and rapid phenotypic switching in response to new environments

Induced gamma-band activity is related to the time point of object identification

Peer reviewedPostprin

Follow-up question handling in the IMIX and Ritel systems: A comparative study

One of the basic topics of question answering (QA) dialogue systems is how follow-up questions should be interpreted by a QA system. In this paper, we shall discuss our experience with the IMIX and Ritel systems, for both of which a follow-up question handling scheme has been developed, and corpora have been collected. These two systems are each other's opposites in many respects: IMIX is multimodal, non-factoid, black-box QA, while Ritel is speech, factoid, keyword-based QA. Nevertheless, we will show that they are quite comparable, and that it is fruitful to examine the similarities and differences. We shall look at how the systems are composed, and how real, non-expert, users interact with the systems. We shall also provide comparisons with systems from the literature where possible, and indicate where open issues lie and in what areas existing systems may be improved. We conclude that most systems have a common architecture with a set of common subtasks, in particular detecting follow-up questions and finding referents for them. We characterise these tasks using the typical techniques used for performing them, and data from our corpora. We also identify a special type of follow-up question, the discourse question, which is asked when the user is trying to understand an answer, and propose some basic methods for handling it