A debris flood is a hazardous hydrogeomorphic process that can change the topographic surface in short time due to high streamflow and large volume of sediment transport. Large areas Eastern Rhodopes Mountains (Bulgaria) are susceptible erosion, flows, floods loose earth masses, rare vegetation, alternating dry wet periods with extreme rainfall. The study area located lower part river Damdere c...

assessment of watershed management activities is one of the main subjects for future planning of practical projects and natural resources management. due to the lack of any tool for assessment of watershed processes in many cases, distributed hydrological models can be useful. the purpose of this study was evaluation of watershed management activities in kan watershed by hec-hms (hydrologic mod...

While most stepped spillway design guidelines were developed for uniform step heights, a nonuniform stepped design might be a practical alternative in some cases. A physical study was conducted in a moderate slope stepped chute (1V:2H) and five stepped configurations were tested for 0.7 < dc/h < 1.9. Detailed air-water flow measurements were performed for each configuration and the results were...

BACKGROUND Stepped wedge randomised trial designs involve sequential roll-out of an intervention to participants (individuals or clusters) over a number of time periods. By the end of the study, all participants will have received the intervention, although the order in which participants receive the intervention is determined at random. The design is particularly relevant where it is predicted...

As the size of quartz resonator continues to shrink, beveling of the plano-plano quartz crystal is needed to reduce mounting loss and to sustain energy trapping so to have low motional resistance for oscillation. The beveling process though is time consuming and difficult to control for small size and low frequency quartz crystals. In recent years, studies on stepped electrode (a.k.a bi-mesa el...

BACKGROUND Revised guidelines for depression recommend a stepped care approach. Little is known about the implementation of the stepped care model by general practitioners (GPs) in daily practice. OBJECTIVES To evaluate the performance of Dutch GPs in their general practice regarding important elements of the stepped care model (identification, severity assessment and stepped care treatment a...

A successful experiment with a physical model requires necessary conditions of similarity. This study presents an experimental method with a semi-scale physical model. The model is used to monitor and verify soil conservation by check dams in a small watershed on the Loess Plateau of China. During experiments, the model-prototype ratio of geomorphic variables was kept constant under each rainfa...

The restorative potential of dam removal on ecosystem function depends on the reversibility of dam effects and its operations. While dam removal is an established engineering practice, the need for an understanding of the ecological response remains. We used paleoflood hydrology, hydrologic modeling, and aerial photo interpretation to investigate the long-term ecologic responses to dam failure ...

DNA adenine methyltransferase (Dam) plays an important role in physiological processes of Gram-negative bacteria such as mismatch repair and replication. In addition, Dam regulates the expression of virulence genes in various species. The authors cloned the dam gene of Yersinia enterocolitica and showed that Dam is essential for viability. Dam overproduction in Y. enterocolitica resulted in an ...