Six Decades of Research on 2D Materials: Progress, Dead Ends, and New Horizons

Non-A, non-B hepatitis: dead ends or new horizons?

Researchers who work on hepatitis may sometimes think that they have come to a dead end with non-A, non-B hepatitis, but in recent years there has been gradual progress in knowledge about these diseases. A hepatitis A like agent that causes epidemic waterborne non-A, non-B hepatitis has been characterized, and the epidemiology of the different forms of non-A, non-B hepatitis has been clarified....

African Development: Dead Ends and New Beginnings

on the comparison of keyword and semantic-context methods of learning new vocabulary meaning

the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...

Six Decades of Flowshop Scheduling Research

In the field of scheduling, the flowshop problems have been thoroughly studied over the last six decades. In this paper we propose a concise overview of flowshop scheduling techniques evolved during this period. We surveyed the exact, heuristics and metaheuristics methods for solving various flowshop scheduling problems. As a result various optimization techniques, solution procedures are avail...

Research: looking back and ahead after four decades of progress.

though 1990 marked the 25th anniversary of the American };. Occupational Therapy Foundation (AOTF), organized research efforts in the profession have been undelway for several decades. Previous articles in this series have highlighted developments in praerice and education over the past 40 years, in which the years 1949 and 1989 have been compared. Dramatic changes have occurred since 1949 in t...