The conversion of sunlight into electricity has been dominated by photovoltaic and solar thermal power generation. Photovoltaic cells are deployed widely, mostly as flat panels, whereas solar thermal electricity generation relying on optical concentrators and mechanical heat engines is only seen in large-scale power plants. Here we demonstrate a promising flat-panel solar thermal to electric po...

It can’t be ignored that the impact of distribution network to the static voltage stability of the distributed generation. In this paper, we first introduce the stability indices of the traditional grid on static voltage and the analytical method, at the same time, we put forward the corresponding advantages, disadvantages and applicable scope. Then, we present a summary of the current research...

Perovskite solar cells based on organometal halide light absorbers have been considered a promising photovoltaic technology due to their superb power conversion efficiency (PCE) along with very low material costs. Since the first report on a long-term durable solid-state perovskite solar cell with a PCE of 9.7% in 2012, a PCE as high as 19.3% was demonstrated in 2014, and a certified PCE of 17....

Low copy number (LCN) DNA profiling is a technique sensitive enough to analyze just a few cells. When this kind of analysis is carried out, special considerations are needed to interpret the results. In particular, it is important to consider the implications of allele dropout and the possibility of contamination from a laboratory source. A rationale for interpreting LCN DNA is described.

Background. Recovery or post-exercise rehabilitation is an essential part of exercise training. Low-level Laser Therapy (LLLT) is a modality increasing interest for recovery because of having a conservative and non-aggressive method. LLLT also decreases the production of fatigue-related biomechanical markers, such as lactate, C-reactive protein (CRP), and Creatine kinase (CK). Objectives. To i...

introduction: tooth pain and sensitization are the two main causes of discomfort after periodontal flap surgery. effects of low level laser therapy for reducing pain have already been established; these kinds of lasers have been used for tooth desensitization as well. this controlled blind study sought to compare tooth pain and sensitization after 660nm laser irradiation in a split mouth and al...

background: patients undergoing orthodontic treatment experience varying degrees of pain with separator insertion. a survey of patients’ attitude towards orthodontic treatment revealed that pain was the most discouraging factor related to their treatment. moreover, it was the highest ranking reason for wanting to discontinue care. the purpose of this study was to determine the effect of low-lev...

In this paper, we propose a circuit that computes the area under a difference waveform and produces it's analog value as output. The transient waveforms pair from which the difference is computed is given as input to the circuit. The circuit is proposed as a hardware solution for a device testing technique called Transient Signal Analysis.