Siting, disassaying and exfilling of the Mamão Dam in Ecuador/RN

Over four decades, there has been silting process of the riverbed that flows into the Mamão Dam, which supplies the water needs of the city of Ecuador-RN. This process has been taking place, caused largely by the receipt of mining tailings upstream of the reservoir. Thus, it became necessary the dredging consisting of removing the debris build-up and the bed debris and the riverbanks, offering a free flow to the waters that are intended for, and the excavation of the waste particles and accumulated sediment in the bed reservoir. For this, it was necessary; there were the necessary techniques for the conservation and proper maintenance so that did not occur obstruction of alluvial channel this spring. The work consisted of advice to the Municipality of the City of Ecuador, state of Rio Grande do Norte, where it made a technical feasibility study to recover the amount of previously existing water in the weir, were recovered to meet the population's consumption demand city and county. The study was conducted in 2013 and thus met the revitalization process and also the awareness of miners and miners, as the appropriate place for deposit of tailings stemmed these activities.

BI-QUAD DUAL REFLECTOR ANTENNA FOR WLAN TASKS

Рассматривается двухрефлекторная Bi-Quad антенна, способная работать в диапазоне частот, соответствующих WLAN Wi-Fi 2,4 ГГц. Благодаря возможности управления положением рефлекторов удается добиться изменения направления излучения, что повышает эффективность использования антенны, коэффициент направленного действия. При управлении происходит поворот ячеек, из которых сформированы отражательные структуры, что позволяет пропускать электромагнитное излучение, которое формирует излучатель из медного провода в форме цифры «восемь». Предложенная конструкция позволяет обеспечить три стабильных режима работы антенны: двустороннее излучение, когда оба рефлектора в открытом положении, при таком режиме у антенны наблюдается одинаковое излучение в обоих направлениях с равным КНД; излучение вверх, в данном режиме верхний рефлектор открыт, что приводит к свободному протеканию электромагнитных волн, а от закрытого нижнего происходят отражения, в результате этого происходит увеличение КНД антенны по сравнению с ситуацией двустороннего излучения; аналогичная ситуация происходит при излучении вниз, когда открыт нижний рефлектор, так электромагнитные волны отражаются от закрытого верхнего рефлектора вниз, что приводит к увеличению КНД антенны. Предложенная конструкция обладает высокой эффективностью в диапазоне рабочих частот The article discusses a two-reflector Bi-Quad antenna capable of operating in the frequency range corresponding to WLAN Wi-Fi 2.4 GHz. Thanks to the ability to control the position of the reflectors, it is possible to achieve a change in the direction of radiation, which increases the efficiency of using the antenna, and increases the directivity. During control, the cells are rotated, from which the reflective structures are formed, which allows the transmission of electromagnetic radiation, which is formed by the emitter, formed from a copper wire in the shape of the number "eight". The proposed design makes it possible to provide three stable modes of antenna operation: double-sided radiation, when both reflectors are in the open position, in this mode the antenna has the same radiation in both directions with equal directivity; radiation upward, in this mode, the upper reflector is open, which leads to free flow of electromagnetic waves, and reflections occur from the closed lower reflector, as a result of this, the antenna directivity increases in comparison with the situation of two-sided radiation. A similar situation occurs when radiating downward, when the lower reflector is open, so electromagnetic waves are reflected from the closed upper reflector downward, which leads to an increase in the antenna directivity. The proposed design is highly efficient in the operating frequency range

Impact of Different Vegetation Zones on the Velocity and Discharge of Open-Channel Flow

Different types of vegetation widely exist in rivers and wetlands. The vegetation will affect the ecological environment and flow process, thus becoming increasingly significant in river engineering and aquatic environmental management. Previous research on vegetated flow is mainly to understand the flow structure of open channels with fully covered one-layer vegetation. However, vegetation often grows along a river bank and co-exists in different heights. The present paper presents experimental results about the flow characteristics of an open-channel with two sides covered by differently layered vegetation, focusing on the effect of vegetation on the velocity distribution and discharge. Two heights of dowels in 10 cm and 20 cm were used to simulate rigid vegetation and arranged in a linear form on both sides of a channel bed under emergent and fully submerged flow conditions. The velocity at different positions was obtained using ADV (Acoustic Doppler Velocimetry). Measured results demonstrate that there exists a shear layer between free-flow and vegetated zones, indicating that the flow transition occurs between fast-moving flow in the free zone and slowly obstructed flow in the vegetated zone and induces a high shear layer and transverse coherent vortices near the interface. Furthermore, compared with the emergent condition, the discharge through the free-flow region slightly decreases under full submerged conditions while the discharge in the vegetated region increases, indicating that the vegetation does not significantly change the discharge percentage in the free region. These findings on differently-layered vegetation would help riparian management practices to maintain healthy ecological and habitat zones.

IoT Based Shirodhara

The contemporary pandemic scenario of COVID-19 has brought to surface the efficacy of old health care wisdom in inhibition and care of diseases where contemporary medicine deceptively wants a real cure. Undeniably, viral diseases for the fascinating vitality of their causal organisms, top this wish list. Ultimately the world seems to be enthusiastic to pay attention about old health care approaches to control viral pandemics if these are found well-intentioned in handling such situations. One such demand is to energetically or intelligently use the therapeutic devices especially the Shirodhara device, at the convenience, anytime, anywhere in a teleconsultation mode. The Shirodhara device design is to be in a manageable form without trailing the legitimacy and principals of Ayurveda. The main elements used in the device comprises of a sensor for perceiving the temperature, a pump for salvaging the medicine, programming device to control the temperature, and regulate the heater and a wavering pipe for free flow of the medicine. The device is premeditated in such a way to evade the faults and snags produced while doing the procedure Shirodhara. Hence, this device is built which is portable, cost effective; it provides a technologically enhanced Shirodhara instrument curtailing the practice of medicine and man power for the procedure.

A direct method to detect and localise damage using longitudinal data of ends-of-span rotations under live traffic loading

Existing work on rotation-based bridge monitoring has focused on indirect methods, such as bridge weigh-in-motion or influence line approaches. However, these approaches require increased instrumentation complexity, and require calibration, necessitating bridge closures. In this paper, we explore the potential of using rotation measurements to create a more practical and cost-effective monitoring system. To this end, we present a damage detection method which directly analyses bridge rotation data measured under live, free-flow traffic loading. We show how the Earth Mover’s Distance, typically used in statistics and image processing, can be applied directly on end-of-span rotation measurement data to achieve effective damage detection and localisation. Numerical simulation results demonstrate the approach’s robustness to the confounding effects of temperature variation and traffic diversity (vehicle type, loading, and velocity). The direct rotation measurement approach is applied to data from an in-service short-span bridge to demonstrate the technique’s capability with free-flow traffic loading.