Suchergebnisse

Numerous concrete structures projects are currently running in Libya as part of a US$50 billion government funding. The quality of concrete used in 20 different construction projects were assessed based mainly on the concrete compressive strength achieved. The projects are scattered all over the country and are at various levels of completeness. For most of these projects, the concrete compressive strength was obtained from test results of a 150mm standard cube mold. Statistical analysis of collected concrete compressive strengths reveals that the data in general followed a normal distribution pattern. The study covers comparison and assessment of concrete quality aspects such as: quality control, strength range, data standard deviation, data scatter, and ratio of minimum strength to design strength. Site quality control for these projects ranged from very good to poor according to ACI214 criteria [1]. The ranges (Rg) of the strength (max. strength – min. strength) divided by average strength are from (34% to 160%). Data scatter is measured as the range (Rg) divided by standard deviation () and is found to be (1.82 to 11.04), indicating that the range is ±3σ. International construction companies working in Libya follow different assessment criteria for concrete compressive strength in lieu of national unified procedure. The study reveals that assessments of concrete quality conducted by these construction companies usually meet their adopted (internal) standards, but sometimes fail to meet internationally known standard requirements. The assessment of concrete presented in this paper is based on ACI, British standards and proposed Libyan concrete strength assessment criteria.

Handbook of Evidence in International Commercial Arbitration is a nonpareil compendium by a diverse group of distinguished arbitration practitioners and academics assessing how to collect, develop, and present evidence in arbitration proceedings, not only from a legal perspective but also from a cultural point of view. In arbitration, evidence provides the basis for almost every decision, be it procedural, jurisdiction.This book addresses the following key concepts and issues related to evidence in arbitration: the normative framework on evidence in arbitration proceedings; the burden and standard of proof; means of evidence, including documents, experts, and witnesses; questions of admissibility, including issues of privilege and confidentiality; the assessment of evidence and its probative value; and court assistance and sanctions.With its in-depth and systematic analysis of the key concepts of evidence, holistic discussion of the applicable normative framework, cross-cultural perspectives on the taking of evidence in arbitration, and reference to case law from major arbitration hubs, this book will prove to be a matchless and undisputed point of reference for academics and practitioners alike. Critical acclaim: "This handbook elegantly captures the range of issues that arises regarding evidence in international arbitration. Bringing together the foremost experts in the field, each contribution offers a thoughtful analysis on these issues and the compilation deserves a prominent spot in every practitioner's arbitral library." Chiann Bao, Independent Arbitrator (Arbitration Chambers) and Vice President of the ICC Court of Arbitration "This publication well deserves recognition as a landmark handbook on evidence in international commercial arbitration. It comprehensively discusses the whole evidentiary process from its foundations taking a comparative and harmonizing perspective as well as the burden and standards of proof to the various evidentiary means up to the assessment of evidence. Written by leading academics and practitioners from all over the world, it will be a safe haven for anyone facing discrete evidentiary issues and looking for answers to fundamental or actual questions including as to privileges, confidentiality, virtual hearings or data protection

International Arbitration and the COVID-19 Revolution' is a timely book that elucidates and analyses how the COVID-19 crisis has redefined arbitral practice, with a critical appraisal of the pandemic?s effects from well-known practitioners on substantive and procedural aspects from the commencement of proceedings until the enforcement of the award. The COVID-19 pandemic has deeply impacted all major economic sectors and industries and elicited profound and systemic changes in international arbitration. Moreover, the fact that entire proceedings are now being conducted remotely constitutes so significant a deviation from the norm as to warrant the designation ?revolution?.00With practical guidance from legal, practical and sector-specific perspectives on the conduct of international arbitration during the COVID-19 pandemic and beyond, the chapters shed light on the insights of leading practitioners into the unprecedented and multifaceted issues that arise

AbstractPhotovoltaic (PV) panels are one of the most important solar energy sources used to convert the sun's radiation falling on them into electrical power directly. Many factors affect the functioning of photovoltaic panels, including external factors and internal factors. External factors such as wind speed, incident radiation rate, ambient temperature, and dust accumulation on the PV cannot be controlled. The internal factors can be controlled, such as PV surface temperature. Some of the radiation falling on the surface of the PV cell turns into electricity, while the remainder of incident radiation is absorbed inside the PV cell. This, in turn, elevates its surface temperature. Undesirably, the higher panel temperature, the lower conversion performance, and lesser reliability over the long term occur. Hence, many cooling systems have been designed and investigated, aiming to effectively avoid the excessive temperature rise and enhance their efficiency. Many cooling methods are used to cool solar cells, such as passive cooling, active cooling, cooling with phase change materials (PCMs), and cooling with PCM with other additives such as nanoparticles or porous metal. In this work, the common methods utilized for cooling PV panels are reviewed and analyzed, focusing on the last methods, and summarizing all the researches that dealt with cooling PV solar cells with PCM and porous structures.