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Các bài báo tiêu biểu
Assessment of particulate matter and particle path trajectory analysis using a HYSPLIT model over Dire Dawa, Ethiopia
- 2024
This work deals with the assessment of particulate matter (PM1, PM2.5, and PM10) over Dire Dawa during the month of May 2021. In the study, purple sensor (PS) and gravimetric methods (GM) were used. The purple sensor was to provide real-time measurements of PM1.0, PM2.5, and PM10 particulates. The GM instruments were constructed using wood with 1 m height (distance to ground), with flat board on t......
Cellulose based adsorbent for cationic methylene blue dye removalAbstract New chemically amended (sodium periodate cellulose nanoparticle (NaIO4 -CNP) adsorbent material was synthesized from dried fibers of cotton. The synthesized NaIO4 -CNP adsorbent material was characterized for functional groups, crystallite size, surface morphology, morphological structure, and particle size) by using ... ...
Tập 6 Số 2
Online learning for DBC segmentation of new IGBT samples based on computed laminography imaging Abstract Insulated gate bipolar transistor (IGBT) is a power semiconductor module .Voids may arise in its solder process when a contaminant or gas is absorbed into the solder joint. They heavily influence the heat exchange efficiency of IGBT, so void inspection is very important. The segmentation of solder region is a crucial step for automated defect detection of I... ...
Preparation of some selective glass–ceramics from nano-silica within the Li2O–SiO2 system with ZrO2 for future dental applications Abstract Many recent studies have indicated that some modified silicate glass–ceramics are considered and recommended to be part of the process of dental applications. Examples from the recommended glass–ceramics include modified lithium silicate with various dopants (ZrO2 , CeO2 ), mica-based glass–ceramics, and leucite-based... ...
Heterogeneous catalytic conversion of lignocellulose: towards green and renewable chemicals Abstract The world's nations are searching for renewable and sustainable energy and fuels due to restrictions on carbon discharges and fossil feedstock shortage.. Biomass is a renewable and sustainable resource; and its conversion is one of the research hotspot areas. This review aims to summarize the evidence gained from different methods of converting lignocellulo... ...
Ảnh hưởng của quy trình tổng hợp đến các tính chất cấu trúc của pha spinel SnFe2O4 thông qua các phương pháp đồng kết tủa, sol-gel và solvothermal: phân tích hình thái, pha, kích thước tinh thể và biến dạng mạng Dịch bởi AI
Tóm tắt
Trong nghiên cứu này, với các ứng dụng rộng rãi của ferrite spinel trong các lĩnh vực như pin Li-ion, chất xúc tác quang và điện tử quang, các tính chất cấu trúc và hình thái của nanoparticle oxide ferrite thiếc (SnFe2 O4 ) được điều tra bằng phương pháp phân tích nhiễu xạ ti... ...
Assessment of alternative methods for analysing maximum rainfall spatial data based on generalized extreme value distribution Abstract The present study aimed to analyze and spatially model maximum rainfall in the southern and southwestern regions of Minas Gerais using spatial statistical methods. Daily data on maximum rainfall were collected from 29 cities in the region. To obtain predictions of maximum rainfall for return periods of 2, 5, 10, 50, and 100 years, Bayesian Inference was emp... ...
Characterization, surface preparation, conservation, and corrosion protection of bronze arrow heads from Cairo military museum using nanocomposite coating Abstract The study focused on examining approximately 32 arrowheads from Cairo’s Qala Salah al-Din military museum, which showed significant signs of deterioration. The main objectives were to investigate the bronze alloy composition of these arrowheads and analyze the physical and chemical characteristics of their patinas. Understanding the causes and mechanisms of... ...
Effects of including fully wraparound geogrid layers on the load-bearing capacity and settlement of a strip footing resting on sandy soilAbstract In this study, a series of small-scale physical model tests were conducted to investigate the effects of fully wrapped geogrid sheets on the load‒settlement response of medium-dense sandy soil beneath a single-strip foundation. Recent research has provided evidence of how different parameters affect the behavior of dense sandy soil when reinforced with full... ...
Tập 6 Số 3
Antimicrobial activities of essential oils from three species of citrus fruits against six infectious tropical bacteria: implications for the care and control of common bacterial tropical diseases in developing countries Abstract The burden of bacterial infections and the failure of antimicrobial agents are increasing worldwide, especially in sub-Saharan Africa. This raises the need for novel therapeutic agents to combat bacterial infectious diseases. The sensitivity of several common pathogenic bacteria to essential oils from the peels of three species of citrus plants was investig... ...