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Now showing items 411-420 of 421
A Promising Future of Balloons for Internet and Other Services
(
UC Berkeley Haas School of Business
, 2023 , Other)
This year, balloons have been in the global spotlight. From January 28 to February 4, 2023, Chinese high-altitude balloon was spotted in the airspace of North America. The US and Canada claimed that these are for surveillance ...
Estimating protection afforded by prior infection in preventing reinfection: Applying the test-negative study design.
(
Oxford University Press
, 2023 , Article)
The COVID-19 pandemic has highlighted the need to use infection testing databases to rapidly estimate effectiveness of prior infection in preventing reinfection ($P{E}_S$) by novel SARS-CoV-2 variants. Mathematical modeling ...
حضور علم النفس الحديث في منهج مالك بن بني في دراسة الحضارة
(
ملتقى الفلاسفة العرب
, 2023 , Article)
إن المتتبع لكتابات مالك بن نبي في تشخيصه لأزمة التخلف الحضاري في العالم الاسلامي، يجد أنه أدرك في وقت مبكر عدم إمكانية تشخيص أزمة العالم الإسلامي من خلال التحليل السطحي لها، لذلك انتقد الاتجاهين السائدين في العالم الإسلامي ...
مؤتمر مركز ابن خلدون السنوي للتجسير
(
مركز ابن خلدون للعلوم الإنسانية والاجتماعية - جامعة قطر
, 2023 , Conference Program)
تعد الظواهر االجتماعية بطبيعتها ظواهر مركبة ومتداخلة، ومع تطور العلوم تتجلى محددات
ً أكثر للظواهر االجتماعية تجعلها أكثر تداخل ً ا وتعقيدا. وهذا التداخل في موضوعات الظاهرة
االجتماعية ينعكس بطبيعة الحال على نمط البحث ...
A carbon dot-based clay nanocomposite for efficient heavy metal removal
(
Royal Society of Chemistry
, 2023 , Article)
Carbon dots and their derivatives with fascinating photoluminescence properties have recently attracted tremendous scientific attention. This work describes the preparation of novel fluorescent bentonite clay (B), modified ...
Design of highly anti-corrosive electroless plated Ni-P/modified halloysite nanotubes nanocomposite coating
(
Elsevier
, 2023 , Article)
Halloysite nanotubes (HNTs) and their modifications with either NH2 (HNT-NH2) or NH2/Polypyrrole (HNT–NH2–PPy) were electroless-deposited into the NiP matrix for the first time to form NiP/HNT, NiP/HNT-NH2 and NiP/HNT–NH2–PPy ...
Synthesis and evaluation of lanthana modified Cu-based catalysts for CO2 hydrogenation to value added products
(
Elsevier
, 2023 , Article)
This study deals with the development and evaluation of lanthana promoted Cu-based catalysts for CO2 hydrogenation reaction. The samples were prepared using solution combustion synthesis method. The study demonstrates that ...
Development of highly active and coke-resilient Ni-based catalysts for low-temperature steam reformation of methane
(
Elsevier
, 2023 , Article)
In this work, we report on the development of highly active and stable catalysts for low temperature steam reformation of methane. The Ni-based catalysts supported on alumina were synthesized by the single step solution ...
Mitigating soil water deficit using organic waste compost and commercial water retainer: a comparative study under semiarid conditions
(
Springer Nature
, 2023 , Article)
Semiarid regions have particularly been confronted with climate change effects reflected by the consistent decrease of rainfall and increase of evapotranspiration. This drought stress constitutes the main constraint for ...
Use of waste marble powder for the synthesis of novel calcium-rich biochar: Characterization and application for phosphorus recovery in continuous stirring tank reactors
(
Elsevier
, 2023 , Article)
This study investigates—for the first time—the synthesis of a novel Ca-rich biochar (N–Ca–B) and its potential use for phosphorus (P) recovery from both synthetic solutions (SS) and treated urban wastewater (TUW) in a ...