To study the temperature rise of dry-type transformer in different cooling conditions, finite element method is used in this paper to calculate temperature distribution in the transformer. Firstly, thermal-fluid coupled model of a transfomer is built up,and the equivalent heat generation of this model is figured out according to the results of delivery test. Then, thermal-fluid coupled model is...

INTRODUCTION The aim of this in vitro study was to compare the temperature rises in the pulp chamber and time spent with different techniques for orthodontic resin adhesive removal. METHODS AND MATERIALS Adhesive removal was performed in 20 extracted human maxillary second premolars with five techniques: high-speed tungsten carbide burs with water-cooling (BurH-cool) and without cooling (BurH...

We document the acoustics of the four Mangetti Dune !Xung coronal clicks. We report the temporal measures of burst duration, relative burst amplitude and rise time, as well as the spectral value of center of gravity in the click bursts. COG correlates with lingual cavity volume. We show that there is inter-speaker variation in the acoustics of the palatal click, which we expect to correlate wit...

The existence of a step-like contrast structure for a class of high-dimensional singularly perturbed system is shown by a smooth connection method based on the existence of a first integral for an associated system. In the framework of this paper, we not only give the conditions under which there exists an internal transition layer but also determine where an internal transition time is. Meanwh...

The effects of strain rate and temperature on the dynamic behavior of Fe-based high temperature alloy was studied. The strain rates were 0.001-12,000 s(-1), at temperatures ranging from room temperature to 800 °C. A phenomenological constitutive model (Power-Law constitutive model) was proposed considering adiabatic temperature rise and accurate material thermal physical properties. During whic...

Nine IMD stations (Alipore, Krishnagar, Sagar Island, Midnapore, Berhampore, Bankura, Contai, Shantiniketan, Haldia), distributed randomly in alluvial, red-laterite and coastal regions of West Bengal, were selected for studying the temperature change. First five stations have database of 105 years, sixth, seventh and eighth stations have database of 45years and the ninth station has the databas...

In order to explore how plant autotoxicity changes with climate warming, the autotoxicity of P. schrenkiana needles' water extract, organic extract fractions, and key allelochemical DHAP was systemically investigated at the temperature rising 2 and 4°C based on the data-monitored soil temperature during the last decade in the stage of Schrenk spruce regeneration (seed germination and seedling g...

Objective. This study evaluated temperature rise of low-shrinkage (LS) self-etch primer (P), LS self-etch adhesive (A), and P90 silorane-based composite resin systems, photopolymerized under normal and artificially demineralized dentin. Methods. Forty 1.5 mm-thick dentin discs were prepared from sound human molars, half of which were demineralized. Temperature rise was measured during photopoly...

Heat, generated during the drilling of a dental implant site preparation, leads to a temperature rise and consequently to a thermal injury of the bone tissue surrounding the implant site, which can cause the subsequent implant failure. In this article, we present new findings related to the temperature rise during implant site drilling under real conditions on a bovine rib bone specimen. The ex...

AIM To determine the temperature rise on the root surface caused by ultrasonic post removal using different devices and techniques in a laboratory setting. METHODOLOGY Two ultrasonic devices, one piezoelectrical (Pi) and one magnetostrictive (Ma), were investigated. A serrated titanium post was placed into the distal root canal of a human mandibular first molar. Four coolant parameters were u...