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      • KCI등재

        RETRACTED ARTICLE: Spatio–temporal attention based real-time environmental monitoring systems for landslide monitoring and prediction

        M. Vijay Sekhar Babu,N. Ashokkumar,Anjali Joshi,Pallavi Sagar Deshpande,Ismail Keshta,Renato R. Maaliw III 대한공간정보학회 2024 Spatial Information Research Vol.32 No.2

        The Publisher has retracted this article in agreement with the Editor-in-Chief. The article was submitted to be part of a guest-edited issue. An investigation by the publisher found a number of articles, including this one, with a number of concerns, including but not limited to compromised editorial handling and peer review process, inappropriate or irrelevant references or not being in scope of the journal or guest-edited issue. Based on the investigation's fndings the publisher, in consultation with the Editor-in-Chief therefore no longer has confdence in the results and conclusions of this article. Authors N. Ashokkumar, Anjali Joshi, Pallavi Sagar Deshpande and Renato R. Maaliw III disagree with this retraction. Author M. Vijay Sekhar Babu has not responded to correspondence regarding this retraction. The publisher has been unable to obtain a current email address for author Ismail Keshta. The online version of this article contains the full text of the retracted article as Supplementary Information.

      • KCI등재

        Studies on Υ-irradiated polymer–nano calcined clay blended cement mortar composites

        M.R. Ismail,E. Hamed,H.A. Abdel-Rahman,M.M. Younes,S.H. El-Hamouly 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.2

        This study focuses on the preparation of blended cement mortars by a partial replacement of Portland cement by different ratios of nano-calcined clay. Also, the addition of PVA on blended cement mortar with different percentages. In addition to the influence of different doses of gamma rays on the physicochemical properties of the blended cement composites; the specimens are cured under tap water. Results showed that, compressive strength and bulk density of the composites increased with increasing the irradiation dose and PVA contents for certain values while, total porosity behaved in an opposite direction. XRD, SEM, TGA confirmed these conclusions.

      • KCI등재

        SKEW(β1+υβ2+νβ3+υνβ4+ν2β5+υν2β6)-CONSTACYCLIC CODES OVER Fq+υFq+νFq+υνFq+ν2Fq+υν2Fq

        R. Al-Shorbassi,M. Al-Ashker,G. Ismail 장전수학회 2020 Proceedings of the Jangjeon mathematical society Vol.23 No.1

        In this paper, we study (θ - β)-constacyclic codes over the ring R = Fq + uFq + vFq + uvFq + v2Fq + uv2Fq, with u2 = 1, v3 = v, uv = vu, q = pm and p is an odd prime. The structural proper- ties of (θ - β)-constacyclic codes over the ring R are studied. Fur- ther, generating polynomials and idempotent generators for (θ - β)- constacyclic codes over the ring R are studied.

      • KCI등재

        Some Properties of q-Distance Energy

        M. R. Rajesh Kanna,R. Pradeep Kumar,Soner Nandappa D,Ismail Naci CANGUL 장전수학회 2020 Advanced Studies in Contemporary Mathematics Vol.30 No.2

        Graphs are nowadays frequently used in modelling. Especially the sub area of graph theory called the molecular graph theory deals with physicochemical proper- ties of chemical substances by means of mathematical methods. Three main methods to study graphs mathematically are to make use of the vertex degrees, distances and matrices. The classical graph energy was dened 1978 by I. Gutman and has a large number of applications in chemistry and physics. In this paper, a recently dened new type of energy called q-distance energy by means of distances and matrices is studied and q-distance energies of star graph, complete graph, crown graph, cocktail party graph, complete bipartite graph, windmill graph are computed.

      • SCOPUSKCI등재

        Optimization of Several Environmental Factors to Human Performance by Using Taguchi Method

        Ismail, A.R.,Haniff, M.H.M.,Yusof, M.Y.M.,Rahman, M.N.A.,Ghani, J.A. Korean Institute of Industrial Engineers 2010 Industrial Engineeering & Management Systems Vol.9 No.2

        The objective of this study is to determine the dominance effects of environmental factors such as Illuminance, humidity and Wet Bulb Globe Temperature (WBGT) on the operators' productivity at Malaysian electronic industry. A case study was carried out at an electronic components assembly factory. The environmental factors examined were the Illuminance (lux), humidity and WBGT of the surrounding workstation area. Two sets of representative data including the illuminance, humidity and WBGT level and production rate were collected during the study. The production rate data were collected through observations and survey questionnaires while the illuminance level was measured using photometer model RS 180-7133, the humidity and WBGT level were measured by using Quest Temp apparatus and humidity. Taguchi Method was utilized to find the sequence of dominant factors that contributed to the productivity of operator at that specified production workstation. The study reveals that the dominant factor contributed to the productivity was WBGT, followed by illuminance and humidity.

      • KCI등재

        Optimization of Several Environmental Factors to Human Performance by Using Taguchi Method

        A. R. Ismail,M. H. M. Haniff,M. Y. M. Yusof,M. N. A. Rahman,J. A. Ghani 대한산업공학회 2010 Industrial Engineeering & Management Systems Vol.9 No.2

        The objective of this study is to determine the dominance effects of environmental factors such as Illuminance, humidity and Wet Bulb Globe Temperature (WBGT) on the operators" productivity at Malaysian electronic industry. A case study was carried out at an electronic components assembly factory. The environmental factors examined were the Illuminance (lux), humidity and WBGT of the surrounding workstation area. Two sets of representative data including the illuminance, humidity and WBGT level and production rate were collected during the study. The production rate data were collected through observations and survey questionnaires while the illuminance level was measured using photometer model RS 180-7133, the humidity and WBGT level were measured by using Quest Temp apparatus and humidity. Taguchi Method was utilized to find the sequence of dominant factors that contributed to the productivity of operator at that specified production workstation. The study reveals that the dominant factor contributed to the productivity was WBGT, followed by illuminance and humidity.

      • KCI등재

        Running State Monitoring of Induction Motor Windings Using Near Infra-red Sensor Residual Signal and Q Factor Analysis

        Gani M. Ismail,Jothi Swaroopan N. M.,Shanker N. R. 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.3

        In Electric motors, identifi cation of insulation and winding faults in stator and rotor during running state is a challenging task. Winding and insulation fault is identifi ed through burning smell of coil, evaluating the effi ciency of motor, or dismantling of motor. Motor running with winding and insulation faults lead to coil-to-coil and phase-to-phase short circuit fault. Winding insulation and winding coil fault in motor leads to unbalanced and diff erential fl ux radiation. Monitoring the winding and insulation during running state of motor is a challenging task. In this paper, monitoring of stator and rotor winding is proposed through NIR sensor during running state of motor. Near Infra-Red (NIR) sensor is fi xed in air gaps of motor. NIR refl ect rays from winding fl ux through air gaps are analysed for faults in stator and rotor winding and insulation. NRI refl ected signals process with spectral band separation and NIR refl ected residual (NRR) signals are obtained. NRR signal process with Tunable Q Wavelet Transform (TQWT) for monitoring and detecting, the insulation and winding fault of motor. Motor allowed to operate at diff erent induced faults such as no load, loaded, stator, rotor insulation fault and stator, rotor-winding fault and NRR signal obtained. Q-factor base Energy band of NRR signals are analysed for winding and insulation faults through sub band energy variations. The low and high frequency component of faulty NRR signal detect with TQWT more accurately. The performance of NIR sensor-based winding and insulation fault diagnosis is compared with conventional transducers such as current signatures and radar signals. The NIR sensor based NRR signals classifi es insulation and winding fault accurately of about 92% compared to current signal signatures.

      • SCIESCOPUSKCI등재

        Effect of Three Different Species of Hay on Dry-matter Intake and Serum Cortisol of Ewes

        Sekine, J.,Abdel-Rahman, Mootaz A.M.,Ismail, A.El-Moez A.,Dosoky, R.M.,Kamel, H.E.M.,Hishinuma, M. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.9

        To determine whether the feeding of different species of hay affects the dry-matter intake and the serum cortisol level of sheep, 6 non-pregnant, non-lactating ewes were offered alfalfa (Medicago sativa) hay (Al), oats (Avena sativa) hay (Ot) and perennial ryegrass (Lolium perenne) hay (Pr) under 6 kinds of treatment including 1) change from Al to Ot, 2) Al to Pr, 3) Ot to Al, 4) Ot to Pr, 5) Pr to Al, and 6) Pr to Ot. The experimental design was a 6${\times}$6 Latin square with a 14 day period of which 9 days were a preliminary period and 5 days as a digestion trial period. The change in hay feeding was done abruptly on the first day of each period without an adaptation period. The blood from the jugular vein was collected on the first, third and the last day of each period through a sterile catheter for the analysis of cortisol. The dry-matter intake was recorded daily throughout the period. The mean daily intake of dry matter (DM, g/kg live weight) was significantly different among the 3 species of hay (Al>Ot>Pr; p<0.05). The digestibility of DM for Al and Ot was the same, but that for Pr was significantly lower than Al and Ot (p<0.05). The mean serum cortisol levels were significantly different among the hays (p<0.05). The level for Pr was the highest and that for Al was the lowest. The abrupt change of hay feeding of 6 treatments produced a significant change in the serum cortisol levels. The DM intake was inversely related to the change of the cortisol level. It is suggested that the animal' intake response to different species of hay may be partly motivated by the psychological feelings toward the hay offered.

      • Modeling and validation of a parabolic solar collector with a heat pipe absorber

        Ismail, Kamal A.R.,Zanardi, Mauricio A.,Lino, Fatima A.M. Techno-Press 2016 Advances in energy research Vol.4 No.4

        Cylindrical parabolic solar concentrators of small concentration ratio are attractive options for working temperatures around $120^{\circ}C$. The heat gained can be utilized in many applications such as air conditioning, space heating, heating water and many others. These collectors can be easily manufactured and do not need to track the sun continuously. Using a heat pipe as a solar absorber makes the system more compact and easy to install. This study is devoted to modeling a system of cylindrical parabolic solar concentrators of small concentration ratio (around 5) fitted with a heat pipe absorber with a porous wick. The heat pipe is surrounded by evacuated glass tube to reduce thermal losses from the heat pipe. The liquid and vapor flow equations, energy equation, the internal and external boundary conditions were taken into consideration. The system of equations was solved and the numerical results were validated against available experimental and numerical results. The validated heat pipe model was inserted in an evacuated transparent glass tube as the absorber of the cylindrical parabolic collector. A calculation procedure was developed for the system, a computer program was developed and tested and numerical simulations were realized for the whole system. An experimental solar collector of small concentration, fitted with evacuated tube heat pipe absorber was constructed and instrumented. Experiments were realized with the concentrator axis along the E-W direction. Results of the instantaneous efficiency and heat gain were compared with numerical simulations realized under the same conditions and reasonably good agreement was found.

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