ARE ALL THE NEGATIVE STUDIES REALLY NEGATIVE?

DECISION-CTO: A "negative" clinical trial? Really?

All-angle negative refraction without negative effective index

Negative refraction of electromagnetic waves in ‘‘lefthanded materials’’ has become of interest recently because it is the foundation for a variety of novel phenomena. In particular, it has been suggested that negative refraction leads to a superlensing effect that can potentially overcome the diffraction limit inherent in conventional lenses. These phenomena have been described in the context ...

When is a Negative Prostate Biopsy Really Negative? Repeat Biopsies in Detection and Active Surveillance.

REPEAT biopsies are commonly performed in the encouraged to reduce the morbidity of prostate diagnostic setting and increasingly for men on active surveillance. A prior study using SEER (Surveillance, Epidemiology, and End Results)Medicare data reported that 11.8% of men with a negative prostate biopsy underwent repeat biopsy within 1 year and 38% did so within 5 years. A major problem is the s...

Negative Thinking

روانشناسی عامه، مشوقی است که " قدرت نیروی تفکر مثبت " را بدانیم از " مکالمه درونی مثبت " در جهت اعتلاء تفکر استفاده کنیم. " این فلسفه نیک اندیشی " نه در همه موارد اما یقیناً در پاره ای موارد کارآمد است. در بعضی از مواقع میزان مناسبی از احتیاط شک و حتی ظن می تواند در سالمتر نمودن انتخاب تأثیر شایانی داشته باشد.

Hydraulic Jump over Negative Slopes with Negative Steps

Many studies have been conducted on the characteristics of hydraulic jumps over horizontal basins. On sloping basins, however, few such studies have been performed so that the issue requires more investigation. A significant number of studies has also been conducted on basins with positive slopes but comparatively few have been carried out on basins with negative slopes. This study was carried ...