Search
1972 articles for “4-dioxopyrimidine-5-carbonitrile” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
Nothing matched all of your words, so these match any of them.
-
INVESTIGATING THE GEOTECHNICAL PROPERTIES OF A LATERITIC SOIL AS A SUB-GRADE MATERIAL FOR ROAD CONSTRUCTION –USING COCONUT HUSK ASH
Abstract: Waste management world-wide plays a major role in socio-economic development over the years. The increase in population over the years has contributed to the rate at which wastes are generated. One major waste generated in Ghana is coconut shell waste. Out of the world producing of coconut, Ghana is ranked 16th. The management of these agricultural waste has become a vital challenge to the development to the Ghanaian economy and …
Published in Journal of Geotechnical Engineering · Vol. 7, Issue 1, 2020 · pp. 37–46 Read article
-
Influence of Additives and Durability Cycles on the Resilient Modulus of Asphalt Stabilized Soil
Abstract: Asphalt stabilized subgrade soils usually show a nonlinear and time dependent response under traffic loading. The elastic property of asphalt stabilized soil is defined by the resilient modulus to represent the nonlinearity behavior with respect to stress level. The aim of this work is to study the impact of durability cycles and additives on the resilient modulus and plastic parameter of the asphalt stabilized soil. Additive materials such as lime …
Published in Journal of Geotechnical Engineering · Vol. 4, Issue 2, 2017 · pp. 32–39 Read article
-
Slope Stability Problem in the Chittagong City, Bangladesh
Abstract: Chittagong, the major port city of Bangladesh is seriously and violently vulnerable for landslide from geological and geographical point of view for many specific reasons. Along with the steep slope, slope cutting, natural weathering and antecedent rainfall causes for landslide of the city during the rainy season caused by thunderclap of heavy storms. This paper presents a quantitative analysis of slope instability problem of the Chittagong city by technical and …
Published in Journal of Geotechnical Engineering · Vol. 1, Issue 3, 2014 · pp. 13–25 Read article
-
Bearing Capacity of Double Box Shaped Skirted Footings on Sand
Abstract: The double-box-shaped footing with and without skirt and sand-resting pressure settlement behavior was discussed in this paper. Different parameters are normalised skirt depth (0.25 to 1.5), relative sand density (30 to 60 percent) and sand footing interface state (partially rough and rough). Results of this study showed that a general and local shear failure was observed at a relative density of 50 percent and 60 percent, and 30 percent and …
Published in Journal of Geotechnical Engineering · Vol. 8, Issue 3, 2021 · pp. 10–19 Read article
-
Probable Causes of Cracks on selected Buildings at Akrowa in Afigya Kwabre District, Ghana
Abstract: This work evaluated the nature of the foundation soils and cracks on twelve representative buildings at Akrowa, in the Afigya Kwabre District near Kumasi in Ghana. Age, material used whether clay/concrete, dimensions of cracks on the buildings and tests for geotechnical parameters of foundation soils such as moisture content, bulk density, specific gravity, particle size distribution, Atterberg limit and direct shear were carried out on soils from four pits dug …
Published in Journal of Geotechnical Engineering · Vol. 10, Issue 3, 2023 · pp. 29–39 Read article
-
Effect of Seat dimensions on operator discomfort while operating Forklifts
Abstract: AbstractThe objective of the study is to investigate the body discomfort sensed by the forklift operators in their operation with respect to seat dimensions and determine the discomfort level at various working shift intervals such as the start of the shift, morning break, before lunch, after lunch, afternoon break and end of the shift with the help of Corlett and Bishop’s method of body mapping. A total of 47 operators …
Published in Journal of Industrial Safety Engineering · Vol. 4, Issue 3, 2017 · pp. 24–36 Read article
-
Perception towards Occupational Hazards and Usage of Personal Protective Equipment among Roadside Welders
Abstract: The study is designed to assess the health related problems in welders, their awareness level towards hazards and use of personal protective equipment (PPE) in India. 102 welders were selected for a study using random sampling in Punjab (India). Semi structured questionnaire was used to collect demographic data like age, educational level, work experience, smoking habits etc. Data related to respiratory disorders and ‘eye injuries and eye diseases’, awareness of …
Published in Journal of Industrial Safety Engineering · Vol. 4, Issue 1, 2017 · pp. 15–20 Read article
-
Evaluation of the Impact of Organizational and Human Factors on Employee’s Behavior in a Petroleum Refinery
Abstract: According to the WHO, 2.9 billion workers worldwide are exposed to different hazards at workplace. Researchers have focused a lot of emphasizes on work-related illnesses, fatalities, and injuries, which has raised awareness of event causation in the workplace. It is speculated that workers' at-risk behaviors, which can be decreased through behavior modification, are what lead to the bulk of workrelated accidents. A study was conducted to analyze the organizational and …
Published in Journal of Industrial Safety Engineering · Vol. 9, Issue 2, 2022 · pp. 11–16 Read article
-
Microstrip Patch Antenna for Dual Band Application
Abstract: AbstractThis paper presents a rectenna that is designed and simulated to power the wireless sensor systems at 3.12 GHz. The antenna substrate is designed with glass epoxy. The rectenna circuit has been simulated on the glass epoxy and RF-to-DC conversation is investigated for power level –5 dBm. The presented antenna has the impedance bandwidth of 58.34%, i.e. from 2.61 to 4.76 GHz with a gain of 2.67 dBi.Keywords: Rectenna, RF-to-DC, …
Published in Journal of Microwave Engineering and Technologies · Vol. 5, Issue 1, 2018 · pp. 25–28 Read article
-
Wi-Fi Shaped Quad-band Microstrip Antenna for RF Energy Harvesting Applications
Abstract: AbstractIn this paper, author proposed a Wi-Fi shaped microstrip antenna for the RF energy harvesting applications. The proposed antenna is operating at the frequencies 0.9, 1.7, 1.9 & 2.4 GHz. The antenna radiates at the quad-band frequency having an application in GSM Band and Wi-Fi Bands. The antenna consists of four different strips which correspond to each frequency in the result. The co-axial probe is connected from the side of …
Published in Journal of Microwave Engineering and Technologies · Vol. 5, Issue 3, 2018 · pp. 11–19 Read article
-
Design and Fabrication of Patch Antenna using DGS for WLAN and WIMAX Applications
Abstract: AbstractIn this paper a small size micro strip patch antenna with dual frequency characteristics is presented. The proposed antenna is designed on an FR-4 epoxy dielectric substrate with the thickness of 1.6 mm and dielectric constant er =4.3. The proposed antenna has used defected ground structure (DGS) stop theory to create dual frequency band characteristics 2.13GHz – 3.25 GHZ for WIMAX and 5.725GHz – 6.3084 Hz for WLAN, respectively. The …
Published in Journal of Microwave Engineering and Technologies · Vol. 7, Issue 1, 2020 · pp. 5–16 Read article
-
An Overview of Elliptical Low Pass Filter by using Defected Ground Structure Method
Abstract: Calculation and differentiation of the response of elliptical low pass filter (LPF) with and without using defected ground structure (DGS) was done. In the present work, return loss, bandwidth and gain have been evaluated. All the designs are printed on the FR4 lossy substrate of dielectric constant ( ) of 4.3, substrate thickness of 1.6 mm and loss tangent of 0.02. Moreover, the effect of controlling parameters namely slots and …
Published in Journal of Microwave Engineering and Technologies · Vol. 4, Issue 2, 2017 · pp. 13–16 Read article
-
An Extended Semi-circular Microstrip Patch Antenna with DGS for UWB Applications
Abstract: This paper presents the design of a semicircular patch with an extended length for UWB applications. The proposed antenna is fabricated on FR4 substrate with relative permittivity of =4.4 and dimensions of 29.5x38x1.57 . The feed used in proposed design is 50 Ω microstrip feed line. The partial ground structure with a T-shaped slot and dual right angled isosceles triangular notches of side 3 mm each has been introduced to …
Published in Journal of Microwave Engineering and Technologies · Vol. 4, Issue 1, 2017 · pp. 13–18 Read article
-
N-Shape Dielectric Resonator Antenna for Wireless Communication
Abstract: A new compact dielectric resonator antenna (DRA) for ultra-wideband (UWB) is presented and studied. This antenna is designed on FR4 substrate with dielectric constant of and overall size of proposed DR antenna is 20×35 mm2. The dielectric resonator of N-shape is only of 5.12 mm thickness and has a very low permittivity constant (10.2). The simulated DR antenna operating from 4.4 to 11.7 GHz covers most of the existing wireless …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 2, 2016 · pp. 13–18 Read article
-
Cylindrical Dielectric Resonator Antenna With Rectangular Patch
Abstract: DRAs are used for 5G communications of huge bandwidth from millimeter to Terahertz. high facts charge is performed through the channel ability i.e. C=Blog2(1+SNR) where C is the channel capacity and B is the bandwidth of the channel. The cylindrical resonator antenna operating in hybrid HEM11 mode. in this paper a cylindrical dielectric resonator antenna (CDRA) with frequency range (26GHz).The cylindrical dielectric resonator with radius r=1.45mm and height h=1.4mm. the …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 1, 2022 · pp. 9–15 Read article
-
Split Ring Resonator Based Dual Frequency Microstrip Patch Antenna For Wireless Applications
Abstract: The objective of the work is to design a compact dual frequency microstrip antenna (MSA) at GSM 1800 MHz and ISM (2.4 GHz). The proposed MSA incorporates a rectangular patch with an inverted U slot printed on the top of RT duroid 5880 substrate with thickness of 0.8mm and dielectric constant of 2.2. The dimensions of the patch are optimized as 45x 54 mm2. It is fed by coaxial feeding. …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 2, 2022 · pp. 1–14 Read article
-
A Quad-Element UWB-MIMO Triangular Monopole Antenna with Triple Band -Notch and High Isolation
Abstract: A quad-element UWB-MIMO triangular monopole antenna with triple notched bands and high isolation is proposed in this paper. The presented antenna consists of four triangular -shaped antenna elements, which are arranged in orthogonal orientation. This antenna is printed on low-cost FR-4 substrate with dielectric constant of 4.4 and its overall size is 50 × 50 × 1.6 mm3. Its operating frequency band is 2.97~11GHz. High isolation of 22dB between four …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 30–37 Read article
-
Design and Implementation of UWB-MIMO Triangular Antenna with Notch Technology
Abstract: The paper proposes a quad-element UWB-MIMO triangular monopole antenna with triple notched bands and high isolation. The antenna comprises four triangular-shaped elements arranged orthogonally, printed on a low-cost FR-4 substrate with a dielectric constant of 4.4. Its dimensions are 50 × 50 × 1.6 mm³, and it operates within the frequency band of 2.97 to 11 GHz. To achieve high isolation of 22 dB between the four radiatingelements, a square …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 3, 2023 · pp. 8–15 Read article
-
Study of Mechanical and Tribological Properties of CSAp Reinforced LM25 MMC
Abstract: Aluminum Matrix Composites (AMCs) allude to the sort of light weight elite aluminum driven material matrix. AMCs comprise of a non-metallic reinforcement which included into aluminum grid which offers worthwhile properties over base material. Reinforcements like Sic, CSAp, B4C, Al2O3, TiC, TiB2, TiO2 are typically liked to enhance the mechanical properties. Here aluminum LM25 is chosen as framework material, while coconut shell powder is chosen as support (reinforcement) material. Coconut …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 2, 2018 · pp. 28–32 Read article
-
Effect of Solutionizing and Ageing on Mechanical Properties of AL2024 Reinforced Alumina Particulate
Abstract: AbstractAluminium 2024 alloy is widely used at automobile and aircraft industries in the form of cast component with varying section size. This study investigates how the microstructure and mechanical properties of AL2024 alloy before and after heat treatment processes. Solution sing at 493°C-5H followed quenching in water at room temperature. Stir casting method is followed to obtain the required composite material with proper mixing of reinforcement. Further, the mechanical properties …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 3, 2018 · pp. 8–12 Read article