This study was conducted to identify the technical and economical performance of the existing models of maize sheller in the country and suggest the best maize sheller models for the farmers during 3 September 2006 to 30 March 2007 in the area of Bogra, Rangpur, Dinajpur, Rajshahi and Jessore. Detail field tests were conducted on seven selected maize sheller models of three categories to assess...

To understand the stability of coal and rock in areas normal faults disturbed by dynamic loads blasting, damage characteristics within a fault are investigated using similarity simulation tests. The mechanism for gas outbursts is analyzed theoretically, results indicate that maximum tensile stress vertical direction blasting hole normal-fault model 1.17 times no-fault model. propagation cracks ...

In this paper, the effects of induction motor rotor faults on the current and voltage of motor are studied through motor current signature analysis. This technique utilizes the results of spectral analysis of the stator current. The distortion of current waveform is generally very minute due to fault of induction motor so it is very difficult. In this paper, power spectrum of motor is taken to ...

The task of diagnosis is to find an explanation for a set of observations and – in the case of prognosis – to forecast the course of events. Diagnosis can be broken down into anomaly detection and failure identification, depending on the desired granularity of information required. Prognosis is concerned with incipient failure detection, margin prediction, or overall performance prediction. The...

Induction motors are a critical component of many industrial processes and are frequently integrated in commercially available equipment and industrial processes. The studies of induction motor behavior during abnormal conditions, and the possibility to diagnose different types of faults have been a challenging topic for many electrical machine researchers. The Motor Current Signature Analysis ...

Prevention is better than cure is not only applicable to medical domain but also equally applicable to engineering field. By analyzing the symptoms and taking appropriate corrective measures before the actual failure takes place would avoid costly cateroscopic damages. In line with this approach a fault analysis through vibration study with wavelet transforms has been attempted in this study. T...

Single phase line-broken (SPLB) fault is one kind of high impedance (HIF). When a SPLB occurs, there are four scenarios: with neither side conductors grounded (SPLB-NSCG), source conductor only (SPLB-SSCG), load (SPLB-LSCG), both (SPLB-BSCG). Traditional HIF detection methods using current or voltage characteristics have low sensitivity to fault. In this paper, analysed firstly in the cases fir...

This paper presents a new fault location (FL) method for medium voltage (MV) networks operating with the neutral solidly grounded or grounded across a small resistance. The FL algorithm is based on the impedance measurement principle and uses the recorded three-phase voltage and current signals as well as the network impedance for the particular symmetrical components – pre-calculated after eac...

The increased frequency of sudden cardiac death after earthquakes and bombings has long proposed that emotional distress plays a role in acute coronary syndromes and arrhythmias. Since the 1960s, several controlled, prospective, epidemiological studies have reported emotional distress as a major risk factor for the onset and worsening of coronary heart disease (CHD) [1]. The Interheart study, a...

Recent studies, and a large body of anecdotal evidence, suggest that upgrades are unreliable and often end in failure, causing downtime and data-loss. While this is sometimes due to software defects in the new version, most upgradefailures are the result of faults in the upgrade procedure, such as broken dependencies. In this paper, we present data on upgrade failures from three independent sou...