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      • The School in a Global Village : Responding with New strategies

        Pimentel, Rosario 선문대학교 통일사상연구원 1997 통일사상 연구논총 Vol.2 No.-

        We consider orthogonal polynomials in two variables whose derivatives with respect to χ are orthogonal. We show that they satisfy a system of partial differential equations of the form ◁그림 삽입▷(원문을 참조하세요) where deg α≤2, deg β≤1, ◁그림 삽입▷(원문을 참조하세요) is a vector of polynomials in x and y for n≥0, and An is an eigenvalue matrix of order (n+1) (n+1) for n≥0. Also we obtain several characterizations for these polynomials. Finally, we point out that our results are able to cover more examples than Bertran's. In summary, the schools are challenged to become dynamic global villages where the citizens (students and faculty) still believe in the dignity of the human person, cherish the indigenous culture, respect other cultures, and use humane judgment and rational wisdom in living the responsibilities expected of them. In the school village, the global citizen is offered a vast range of opportunities to make his greatest service and contribution to humankind.

      • KCI등재후보

        Deep-beams with indirect supports: numerical modelling and experimental assessment

        Mário Pimentel,Paulo Cachim,Joaquim Figueiras 사단법인 한국계산역학회 2008 Computers and Concrete, An International Journal Vol.5 No.2

        An experimental and numerical research was conducted to gain a deeper insight on the structural behaviour of deep-beams with indirect supports and to assess the size effects in the ultimate state behaviour. The experimental campaign focused on the influence of the reinforcement tie distribution height on the compression check of the support region and on the benefits of using unbonded prestressing steel. Three reduced scale specimens were tested and used to validate the results obtained with a nonlinear finite element model. As a good agreement could be found between the numerical and the experimental results, the numerical model was then further used to perform simulations in large scale deep-beams, with dimensions similar to the ones to be adopted in a practical case. Two sources of size effects were identified from the simulation results. Both sources are related to the concrete quasi-brittle behaviour and are responsible for increasing failure brittleness with increasing structural size. While in the laboratory models failure occurred both in the experimental tests as well as in the numerical simulations after reinforcement yielding, the numerically analysed large scale models exhibited shear failures with reinforcement still operating in the elastic range.

      • REINFORCING QUALITY MANAGEMENT: THE IMPACT OF EFQM AWARDS ON ORGANIZATIONAL MANAGEMENT AND CULTURE

        ( Luis Pimentel(ph. D. ) ),( Jae Hyeon Jun(m. S. ) ),( Heejun Park(ph. D. ) ) 한국품질경영학회 2015 한국품질경영학회 학술대회 Vol.2015 No.2

        Purpose: The purpose of this paper is to examine how the recognition of the European Foundation for Quality and Management (EFQM) awards to organizations and the underlying implementation of quality management processes/programs (variable 1), particularly contribute to the improvement of management models (including organizational culture as a support to management). Beyond the assessment of a favourable impact, the paper aims to identify the improvement of methods and proceedings (after the EFQM recognition), translated into different levels/stages of management models and management control systems (variable 2), testing the hypothesis of correlation between these two variables. Methodology/Approach: The investigation covers the 35 organizations that won EFQM awards in Portugal between 2010 and 2015 (April). The bases for the study are the different levels/scores of EFQM awards. A survey was used, based on a 10 point Likert scale questionnaire (1=Basic management control system/organizational culture; 10=Advanced and very efficient management control system/organizational culture). The questionnaire identifies properly the different levels and stages of management control frameworks and proceedings. With the aim of analyzing and explaining more deeply how quality management and the management control models and systems evolved, interviews were carried out in all 35 organizations. The interviews were conducted between November 2014 and June 2015. The interviewees were mainly quality managers. Since the interviews implied the collection of more accurate data, findings and conclusions were consequently reinforced. Findings: Important findings result from the research. First, whenever organizations implement a quality management process/program, there is a favourable impact on the proceedings associated with management models. Second, the 10 point Likert scale indicates an average supporting the conclusion that substantial improvements occurred in these organizations regarding the implementation of management control models. Finally, a positive and very strong correlation (Pearson and Spearman coefficients) was found between the two variables: (i) different levels/scores of EFQM awards in organizations, and (ii) results of the questionnaire on different levels/stages of management models and management control systems. Research implications: The paper contributes to literature on quality management by highlighting the significant impact that quality management processes/programs have on the improvement of management control models in organizations. Moreover, by presenting a positive and strong correlation between the two variables, the study makes it possible to conclude that the more an organization invests in a quality management process/program, the more efficient and useful a management control model becomes. Consequently, quality management is reinforced. Both these contributions of the paper are important for academics as well as for practitioners. Originality/Value of the paper: Many studies have been conducted on quality management analyzing the impact of quality on performance of organizations (financially and/or non- financially). But no studies in scientific literature analyzed and discussed the impact of quality management on the effectiveness of management models and organizational culture as a support to management. Our study helps to close this gap, contributing to the development of a new body of knowledge, by assessing this favourable impact, and also by correlating the level of quality management implementation (through EFQM awards) with the level/stages of management control models.

      • KCI등재

        Metabolic adjustment of the larval fat body in Hermetia illucens to dietary conditions

        André Coppe Pimentel,Aurora Montali,Daniele Bruno,Gianluca Tettamanti 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4

        The black soldier fly (BSF), Hermetia illucens, has great economic importance because of its ability to degrade a wide variety of organic products, including vegetable waste. The conversion of organic waste into valuable nutrients, that can be isolated from larvae and prepupae, is a widely exploited strategy to produce protein for animal feed and, consequently, comprehending the mechanisms that regulate nutrient accumulation in this insect could improve the production of insect-derived meal quantitatively and qualitatively. Since the fat body participates in metabolizing proteins, fat, and sugars in insects, detailed knowledge of this organ and of its modifications in relation to insect food intake could provide interesting clues about the nutritional value of the larvae, a fundamental aspect from an applied perspective. To this end, we performed a morphofunctional and molecular characterization of the fat body of sixth instar H. illucens larvae reared on different food substrates, focusing on markers related to nutrient accumulation. We demonstrate that a protein-poor diet affects both lipid and protein accumulation in fat body cells as well as the expression of key genes involved in these metabolic processes. Our study not only represents the first characterization of the larval fat body in this insect, but also confirms the central role of this organ in nutrient accumulation and substantiates the hypothesis of producing larvae with higher nutritional value by manipulating the diet.

      • KCI등재

        Acupuncture for the Treatment of Cardiovascular Diseases: A Systematic Review

        Rodrigo de Lima Pimentel,Alice P. Duque,Beatriz R. Moreira,Luiz F. Rodrigues Junior 사단법인약침학회 2019 Journal of Acupuncture & Meridian Studies Vol.12 No.02

        Acupuncture, for the westerns countries, is an innovative and low-cost therapy for treatment and prevention of cardiovascular diseases (CVDs). However, most of its effects and mechanisms are poorly understood. Thus, the objective of this work was to systematically review the literature regarding the clinical effects of acupuncture for the treatment and prevention of CVDs. A search for papers published in English or Portuguese in the past 20 years was conducted at PubMed, SciELO, and PEDro databases. Clinical trials conducted on the effects of acupuncture were included in this review. Two reviewers extracted the data independently from the remaining 17 articles after screening. The most used acupoint was PC6 (10 studies, 64.7%), followed by ST36 (6 studies, 35.3%) and auricular acupoints (4 studies, 23.5%). Among the clinical applications, hypertension was the most studied CVD, with acupuncture being the most reported method among the studies (70.6%). Only three articles reported no benefit in the treatment of CVDs for the methodology used. We conclude that although several studies indicated an improvement in the response of the cardiovascular system in CVDs by acupuncture, electroacupuncture, or electrostimulation treatment, the heterogeneity of the studies does not allow a standardization of its application for each specific disease, making further studies necessary for its use to become a reality.

      • Nonlinear modeling parameters of RC coupling beams in a coupled wall system

        Gwon, Seongwoo,Shin, Myoungsu,Pimentel, Benjamin,Lee, Deokjung 테크노프레스 2014 Earthquakes and structures Vol.7 No.5

        ASCE/SEI 41-13 provides modeling parameters and numerical acceptance criteria for various types of members that are useful for evaluating the seismic performance of reinforced concrete (RC) building structures. To accurately evaluate the global performance of a coupled wall system, it is crucial to first properly define the component behaviors (i.e., force-displacement relationships of shear walls and coupling beams). However, only a few studies have investigated on the modeling of RC coupling beams subjected to earthquake loading to date. The main objective of this study is to assess the reliability of ASCE 41-13 modeling parameters specified for RC coupling beams with various design details, based on a database compiling almost all coupling beam tests available worldwide. Several recently developed coupling beam models are also reviewed. Finally, a rational method is proposed for determining the chord yield rotation of RC coupling beams.

      • SCIESCOPUSKCI등재

        Review : Placebo Effect in Clinical Trial Design for Irritable Bowel Syndrome

        ( Eric Shah ),( Mark Pimentel ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2014 Journal of Neurogastroenterology and Motility (JNM Vol.20 No.2

        Ongoing efforts to improve clinical trial design in irritable bowel syndrome have been hindered by high placebo response rates and ineffective outcome measures. We assessed established strategies to minimize placebo effect as well as the various approaches to placebo effect which can affect trial design. These include genetic markers such as catechol-O methyltransferase, opioidergic and dopaminergic neurobiologic theory, pre-cebo effect centered on expectancy theory, and side effect unblinding grounded on conditioning theory. We reviewed endpoints used in the study of IBS over the past decade including adequate relief and subjective global relief, emphasizing their weaknesses in fully evaluating the IBS condition, specifically their motility effects based on functional net value and relative benefit-harm based on dropouts due to adverse events. The focus of this review is to highlight ongoing efforts to improve clinical trial design which can lead to better outcomes in a real world setting. (J Neurogastroenterol Motil 2014;20:163-170)

      • Conditions to avoid synchronization effects in lateral vibration of footbridges

        Andrade, Alexandre R.,Pimentel, Roberto L.,Silva, Simplicio A. da,Souto, Cicero da R. Techno-Press 2022 Structural monitoring and maintenance Vol.9 No.2

        Lateral vibrations of footbridges may induce synchronization between pedestrians and structure itself, resulting in amplification of such vibrations, a phenomenon identified by lock-in. However, investigations about accelerations and frequencies of the structural movement that are related to the occurrence of synchronization are still incipient. The aim of this paper is to investigate conditions that could lead to avoidance of synchronization among pedestrians themselves and footbridge, expressed in terms of peak acceleration. The focus is on the low acceleration range, employed in some guidelines as a criterion to avoid synchronization. An experimental campaign was carried out, employing a prototype footbridge that was set into oscillatory motion through a pneumatic exciter controlled by a fuzzy system, with controlled frequency and amplitude. Test subjects were then asked to cross the oscillating structure, and accelerations were simultaneously recorded at the structure and at the subject's waist. Pattern and phase differences between these signals were analysed. The results showed that test subjects tended to keep their walking patterns without synchronization induced by the vibration of the structure, for structural peak acceleration values up to 0.18 m/s<sup>2</sup>, when frequencies of oscillation were around 0.8 to 0.9 Hz. On the other hand, for frequencies of oscillation below 0.7 Hz, structural peak accelerations up to 0.30 m/s<sup>2</sup> did not induce synchronization.

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