The potential influence of vasectomy being a risk factor for the development of prostate cancer is not a new concept, with more than 30 publications addressing the topic. Given the global frequency of vasectomy and the prevalence of prostate cancer, this subject justifiably deserves scrutiny. Several articles have claimed that vasectomy puts men at risk for future development of prostate cancer...

After many years of research, drug treatment in cerebral hypoxia is still controversial and no treatment appears to be firmly established. Not even the mechanisms causing damage have been established (Siesjo, 1981), only that they are linked to a disturbance in the oxygen demand: supply ratio. Enthusiasm for new modes of therapy have waxed and waned. We have witnessed alternating enthusiasm for...

which has been on the drawing board for some three decades, is the largest inter-basin water transfer planned to date in India or elsewhere. The idea has waxed and waned depending upon the political dispensation at any given point in time. Under the Challenge Program for Water and Food, IWMI undertook a broad strategic exploration of the basic idea of NRLP and its assumptions. This Highlight ex...

2032 Reinforcement, like sympatric speciation (see Box 1), has charisma. Evolutionary biologists are still deeply uncertain about how often these processes take place, and hence how important they are in explaining the biological diversity we see today. Empirical and theoretical support for both ideas has waxed and waned over recent decades. Yet both ideas have consistently garnered an unusual ...

Snow friction results from a mixture of processes. With little meltwater present, the surfaces are partially separated and, when too much water is present, the contact area increases and there may be capillary attachments. Slider thermal conductivity and even colour are very important. Heat is generated by friction and solar radiation absorbtion and is conducted away by both slider and ice part...

Between the early 1970s and the early 2000s, the aggregate household saving ratio in Australia declined steadily, from around 20 per cent to around zero (Graph 1). This trend was driven by a number of factors, including an increased availability of credit, falling real interest rates, more stable economic outcomes and rising asset prices, while changes in household income growth and expectation...

Maxillary defects occur due to surgical treatment of benign and malignant tumors, congenital malformation, and trauma. Prosthetic rehabilitation in such patients is influenced by the size and location of the defect. The most common of all intraoral defects are seen in the maxilla, in the form of an opening into the maxillary sinus and nasopharynx. These defects create disabilities in speech, de...

This article analyzes the contemporary construction of male menopause as a clinical disorder. While medical interest in a male climacteric has waxed and waned over the past century, the past decade has witnessed a surge of both scientific and commercial interest in its diagnosis and treatment. In explaining why this is the case, the author suggests that shifting cultural narratives of aging and...