• Issue

    Engineering Reports: Volume 4, Issue 9

    September 2022

ISSUE INFORMATION

Open Access

Issue Information

  • First Published: 05 September 2022

REVIEW

Open Access

Composition, nutritional value, and uses of Ricinodendron heudelotii, Vitex doniana, and Cleome gynandra seed oil, three indigenous oil species sources of omega 3, 6, and 9 fatty acids: A review

  • First Published: 27 February 2022
Composition, nutritional value, and uses of Ricinodendron heudelotii, Vitex doniana, and Cleome gynandra seed oil, three indigenous oil species sources of omega 3, 6, and 9 fatty acids: A review

Wild oil are of particular interest because of their widespread applications. Ricinodendron heudelotti, Vitex doniana, and Cleome gynandra seeds oils represent a nonpolluting renewable resource and provide a wide diversity in fatty acids composition. These oils are nutritionally beneficial to human health. Some of these oils could be used in food and cosmetic industries.

RESEARCH ARTICLES

Open Access

Prediction of effective vibration condition under air void reduction using mortar rheological constant

  • First Published: 10 January 2022
Prediction of effective vibration condition under air void reduction using mortar rheological constant

This study examined the method of reducing the surface voids caused by entrapped air of medium fluidity and ordinary concrete. Results revealed that the surface void area ratio (SVAR) decreased when the acceleration of the vibration box was increased regardless of the type of concrete. In addition, a prediction equation for the SVAR-acceleration relationship was proposed using the rheological constants of mortar that correlate with SVAR and slump.

Open Access

Design of detection-jamming shared waveform based on virtual force field algorithm

  • First Published: 22 February 2022
Design of detection-jamming shared waveform based on virtual force field algorithm

(1) Virtual force field algorithm, (2) shared signal design, (3) signal processing.

Open Access

Quantifying cerebral blood flow in the whole brain in a diffusion model with multiple sources from cerebrovascular structures

  • First Published: 27 January 2022
Quantifying cerebral blood flow in the whole brain in a diffusion model with multiple sources from cerebrovascular structures

A diffusion model with multiple sources from cerebrovascular structures was suggested for generating contour plots of CBF (cerebral blood flow) in the whole brain. The CBF concentration in the brain tissue was assumed to be a diffusion process, affected by major cerebrovascular vessels. The suggested model was tested to predict CBF in the whole brain. As a parametric study, CBF in the whole brain was predicted in the damaged areas of the brain.

Open Access

Impact of hybrid nanofluids (Ag-TiO2/H2O) on improving the performance of a heat exchanger with turbulent induction elements

  • First Published: 24 February 2022
Impact of hybrid nanofluids (Ag-TiO2/H2O) on improving the performance of a heat exchanger with turbulent induction elements

This article aimed to examine a twisted strip heat exchanger alongside hybrid nanofluids Ag and TiO2 with lamina, platelets, and spherical shape factors. Variations in temperature, pressure, velocity, turbulence kinetic energy, and finally the influence of nanofluid volume fraction, flow turbulence, the effect of obstacle diameter on the twisted tape on heat transfer will be explored.

Open Access

Three-phase transformerless photovoltaic inverter without common mode leakage current

  • First Published: 17 January 2022
Three-phase transformerless photovoltaic inverter without common mode leakage current

(1) A three-phase transformerless (TPT) PV inverter without common mode leakage current (CMLC) has been proposed, which consists of a boost converter and a three-phase inverter. (2) Grounds of PV array and three-phase loads are connected directly, so there is no CMLC in the proposed three-phase inverter. (3) Operating principle of the proposed three-phase inverter is illustrated. In addition, experimental results confirm the theoretical analysis.

Open Access

The spatial diffusion of “multi-station integration” and sustainable development: From the perspective of eight economic zones in China

  • First Published: 06 February 2022
The spatial diffusion of “multi-station integration” and sustainable development: From the perspective of eight economic zones in China

“Multi-station integration” (MSI), as a novel business model can improve the energy utilization efficiency and promote the cross-border business integration. Therefore, the quantitative analysis about MSI spatial diffusion in Chinese eight economic zones can boost the popularity of MSI.

SHORT COMMUNICATION

Open Access

An enhanced cross-layer solution for IFC applications using HTS systems at Q/V-band

  • First Published: 06 January 2022
An enhanced cross-layer solution for IFC applications using HTS systems at Q/V-band

The Q/V band communication systems open new avenues for next generation of high-throughput satellite (HTS) systems. More specifically, they are attractive due to their high bandwidth for user and gateway links. Having a wide bandwidth at Q/V band makes it permissible to offload the links between the satellite and its earth station hubs (gateway) from the Ka band to the Q/V band. This enables additional bandwidth available for HTS feeder links and user links of specific market verticals, which in turn results in reduction of cost per bit for in-flight connectivity applications to provide WiFi capability on the aircraft. This study provides a deep overview of network architecture at the ground gateway infrastructure with respect to the network management system (NMS) to optimize network traffic utilization. We have looked at a gateway constellation platform which optimizes the actual cost-efficient solution for deploying routing user traffic among the networks. In addition, the study discusses the elements involved in the NMS which interfaces with the gateway platform. The overall NMS platform design and capabilities are discussed as they provision the network service parameters throughout the entire operation. The proposed solution integrates the physical antenna, antenna control unit and the power supply into one bundle on the aircraft. This will result in approximately 10% throughput increase compared to conventional methods that do not deploy N+P gateway architecture. The proposed method has enhanced spectrum efficiency along with the NMS unit that has been discussed in detail. Finally, a wideband and multibeam antenna is introduced as an essential part of the solution followed up by simulation results.