33 results on '"Change temperature"'
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2. 形状记忆合金在复合材料损伤监测中的应用.
- Author
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张亚楠, 刘亚冬, and 刘兵飞
- Subjects
SHAPE memory alloys ,COMPOSITE materials ,RESISTANCE to change ,PHASE transitions ,NICKEL-titanium alloys - Abstract
Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
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3. Research on Fast Change Temperature TCU in IC Manufacturing
- Author
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Dong Chunhui, Mengjie He, He Maodong, Chang Xin, Cao Xiaokang, Feng Tao, Rui Shouzhen, Liu Ziyang, and Nijing Pi
- Subjects
Change temperature ,Temperature control ,Materials science ,Ic manufacturing ,Etching (microfabrication) ,Process (computing) ,Base (geometry) ,Automotive engineering ,Coolant ,Transient temperature response - Abstract
Temperature fast change during a step or several steps is required by latest etching process in IC manufacturing. Two methods to reach this requirement was described, and several simulation devices are designed to test the capability. The temperature control unit (TCU) need to provide two different channels coolant with high and low temperature. One method is to switch the different channels connect to main tool electrostatic chuck (ESC). Two different base temperatures can be used for main tool, the heater in the ESC is controlled to get the final temperature. Another is to mix the two different temperatures with motor valves to reach the target temperature. Two types of equipment are developed using the corresponding method. The test devices are introduced, and the test shows transient temperature response of two equipment. Both channels must return to their respective set points with ±1°C variation within 120 seconds. The maximum deviation of supply temperature must below 20℃ when temperature ramp up or ramp down. These TCU can support the latest etching process and the switch or mix test with simulation devices can be used to judge the TCU performance.
- Published
- 2021
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4. Regime change and transitional regime behavior of C60 molecular beams
- Author
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J.C. Yang, Rui Cheng, D B Qian, Xing-Kang Zhang, Xinwen Ma, Xiaolong Zhu, S. F. Zhang, and D C Zhang
- Subjects
Chemistry ,Flow (psychology) ,General Physics and Astronomy ,Nanotechnology ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,01 natural sciences ,Measure (mathematics) ,Change temperature ,Distribution function ,Regime change ,0103 physical sciences ,Knudsen number ,Physical and Theoretical Chemistry ,010306 general physics ,0210 nano-technology ,Beam (structure) ,Body orifice - Abstract
We measure the flow regime change of C60 molecular beams, produced by a Knudsen oven with an orifice (diameter, 1 mm; thickness, 0.5 mm), from effusive to transitional. We determine the change temperature to be about 800 K and find an inefficient translational cooling of C60 molecules in the transitional regime. Such an inefficient cooling leads us to modify the velocity distribution function assumed standardly in directed molecular beams. The determined change temperature could be used as a benchmark for estimating the beam regime in experiments involving C60 molecular beams prepared by a Knudsen oven with a thin millimeter-scale orifice.
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- 2018
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5. Release mechanism utilizing shape memory polymer material
- Author
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Benett, William [Livermore, CA]
- Published
- 2000
6. Microfabricated therapeutic actuators and release mechanisms therefor
- Author
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Krulevitch, Peter [Pleasanton, CA]
- Published
- 2000
7. Visualizing Indented Writing on Thermal Paper by the Controlled Application of Heat
- Author
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John W. Bond and Matthew Johnson
- Subjects
Engineering drawing ,Normal color ,Engineering ,business.industry ,010401 analytical chemistry ,Significant difference ,Thermal paper ,01 natural sciences ,0104 chemical sciences ,Pathology and Forensic Medicine ,03 medical and health sciences ,Change temperature ,0302 clinical medicine ,Handwriting ,Variable pressure ,Genetics ,030216 legal & forensic medicine ,Composite material ,business - Abstract
Indented writing on thermal paper made with either one, two, or three sheets of paper above the thermal paper has been visualized by the controlled application of heat to the thermal paper at temperatures below the paper's normal color change temperature. Indentations created by applying a variable pressure to a steel letter stamp showed that, with one sheet above the thermal paper, indentations were more visible at lower pressures than with either two or three sheets above. Handwriting from 20 volunteers produced indented writing graded with most of the text clear and easy to read for all samples with one sheet above, half the samples with two sheets above and eight samples with three sheets above. Comparison with ESDA showed that, with three sheets above, there was a statistically significant difference (p < 0.01), with heating producing more samples than ESDA with most of the text clear and easy to read.
- Published
- 2017
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8. Microfabricated therapeutic actuators
- Author
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Benett, William [Livermore, CA]
- Published
- 1999
9. Design of integrated science student book theme adaptation of the human body to change temperature integrated 21st century learning using integrated types
- Author
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Ratnawulan, A. Samra, Syafriani, and T. Supriadi
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Cognitive science ,History ,Change temperature ,ComputingMilieux_COMPUTERSANDEDUCATION ,Sociology ,Human body ,Adaptation (computer science) ,Computer Science Applications ,Education ,Theme (narrative) - Abstract
The implementation of integrated science learning in junior high schools is still not thematic and integrates 21st century learning into the learning process. 21st Century Learning requires students to have literacy skills, knowledge skills, skills and attitudes, and mastery of technology. Increased knowledge, attitudes and skills are caused by the lack of availability of relevant learning resources. One learning resource that can improve 21st-century skills is students’ books. The method used in this study is the model of plomp development which consists of three stages, namely preliminary investigation, Prototyping stage, Assessment phase. The research has reached the Prototyping stage and has been tested for validity. The instrument used in this study is a questionnaire consisting of Aspects of content; Construction Aspect; Language aspects; Integrity aspect.
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- 2020
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10. The Analysis of Temperature Changes of the Saliva Traces Left on the Fur During Laboratory Rats Soial Contacts
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Magdalena Mazur-Milecka and Jacek Ruminski
- Subjects
0301 basic medicine ,Saliva ,Hot Temperature ,Computer science ,Event (relativity) ,Real-time computing ,Temperature ,Rats ,Time ,03 medical and health sciences ,Change temperature ,030104 developmental biology ,Animals ,Social Behavior - Abstract
Automatic analysis of complex rodent social behavior, especially aggressive ones, is of important scientific interest. In this paper we analyze the properties of the data created as a result of aggressive rodent social behavior. Detection of specific aggressive behaviors is based on the event of leaving traces of saliva on the fur of the attacked individual, which are clearly visible in the thermal imaging. The traces change temperature in time in a specific way. After bite, saliva is cooled and then heated to the body temperature. Usage of this method in social behavior analysis ensures detection and tracking aggressive behaviors even if the event itself is invisible.
- Published
- 2018
11. Fusion of environmental monitoring components and gardening modules for manipulating indoor air quality
- Author
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Z L Yang, Y J Lin, C C Yu, and J C Chen
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Change temperature ,Architectural engineering ,Smart control ,Indoor air quality ,law ,Computer science ,Process (engineering) ,Smart device ,Environmental monitoring ,Control (management) ,Manipulator ,law.invention - Abstract
People who live in a crowded jungle of metropolis are easy getting stressed and extremely need relaxing activities, e.g. gardening. The considerations about limited space, busy day and scarce experience will stop people to take action on gardening. They do need a device to help them taking care of plant, a smart device which is able to remotely control would be popular to the business of interior planting. This demand encouraged many designers to create the modules for interior planting. It also pushes researchers to study how interior planting is able to capture particles, to absorb VOC, to transform CO2, to change temperature and moisture. However, planting module with smart control of indoor air quality is rare until now. So we created an environmental manipulator in which environmental monitoring sensors, planting modules, and remote relays are fused together. This study described the process how we get the optimal design of environmental manipulator under a series of interviews based on Evaluation Grid Method (EGM).
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- 2019
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12. Kangaroo rats change temperature when investigating rattlesnake predators
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Rulon W. Clark and Hannes A. Schraft
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030110 physiology ,0106 biological sciences ,0301 basic medicine ,Experimental and Cognitive Psychology ,010603 evolutionary biology ,01 natural sciences ,Dipodomys merriami ,Predation ,Body Temperature ,03 medical and health sciences ,Behavioral Neuroscience ,Sensory ecology ,Animals ,Dipodomys ,skin and connective tissue diseases ,Predator ,biology ,Ecology ,Crotalus ,biology.organism_classification ,Change temperature ,Body Temperature Changes ,Thermography ,Predatory Behavior ,Crotalus scutulatus ,Linear Models ,sense organs ,Snout ,Stress, Psychological - Abstract
Predator presence causes acute stress in mammals. A prey animal's stress response increases its chance of survival during life-threatening situations through adaptive changes in behavior and physiology. Some components of the physiological stress response can lead to changes in body surface temperatures. Body temperature changes in prey could provide information about prey state to predators that sense heat, such as pit vipers. We determined whether wild rodents undergo a stress-induced change in body surface temperature upon detecting and investigating rattlesnake predators. We staged encounters between free-ranging Merriam's kangaroo rats (Dipodomys merriami) and tethered Mojave rattlesnakes (Crotalus scutulatus) at baited feeding stations, and recorded interactions with a thermal-imaging camera. Kangaroo rats showed a significant change in maximum head temperature, snout temperature, and hind leg temperature during interactions with rattlesnakes. This supports the hypothesis that presence of a predator induces body temperature changes in prey animals. If changes in prey heat signature are detectable by heat-sensitive rattlesnakes, rattlesnakes could use this information to evaluate prey vigilance or arousal before striking; however, more detailed information on the sensory ecology of the pit organ under field conditions is needed to evaluate this possibility.
- Published
- 2016
13. Analysis of the thermal effect influence on the MEMS accelerometer sensors measurement results
- Author
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Aleksander Sawicki and Wojciech Walendziuk
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Microelectromechanical systems ,Engineering ,Offset (computer science) ,business.industry ,Acoustics ,Thermal effect ,02 engineering and technology ,Mems sensors ,Atmospheric temperature range ,021001 nanoscience & nanotechnology ,Accelerometer ,01 natural sciences ,010309 optics ,Digital sensors ,Change temperature ,0103 physical sciences ,Electronic engineering ,0210 nano-technology ,business - Abstract
In the study the results of the thermal effect influence on the measurements of three different analog accelerometer sensors (ADXL335, ADXL327, LIS344ALH) and one digital sensor (MPU-9255) are presented. The measurement data was registered within the -2°C ÷ 65°C temperature range. The first part of the article characterizes the procedure of determining the acceleration for analog and digital sensors. Moreover, the study includes the methods of determining parameters such as Zero-g Offset and sensitivity. The temperature parameters of the accelerometers, such as Sensitivity change vs. Temperature and Zero-g Offset vs. change Temperature, were also determined. The indicators were determined separately for each of the OX, OY, OZ axes for the investigated MEMS sensors. Finally, the obtained results were compared with the parameters guaranteed by the accelerometric sensor manufacturers.
- Published
- 2016
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14. Thermoexchange of different regions of the human body with environment
- Author
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Petr Dmitriyevich Shabanov and Yuriy Ivanovich Luchakov
- Subjects
Change temperature ,Communication ,business.industry ,Ecology ,General Medicine ,Human body ,Biology ,business ,Mechanism (sociology) ,Organism - Abstract
The literature and proper data concerning evaluation of thermoproduction and thermoutput of different regions of the human body are analyzed in the article. The human thermoexchange with environment was assessed in human beings weighing 69–73 kg in special thermocamera. The organism was shown to change temperature of the body tissues in definite limits only by means of thermotransfer without changing thermoproduction and thermoutput. This mechanism can explain the phenomenon of subfebrile temperature in various human diseases.
- Published
- 2012
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15. The Using of Insulated Fiber Bragg Grating Temperature Sensor in 35kV Switch Cabinet
- Author
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Jiang Chun Xu, Chuan Li, Shao Quan Zhang, Xiao-ping Xu, Qing Hua Yan, Yan Chen, Yanr Feng Chen, Ying Na Li, and Yun Shui Xu
- Subjects
Electric arc ,Change temperature ,Engineering ,Fiber Bragg grating ,law ,business.industry ,Acoustics ,Contact resistance ,General Engineering ,Electronic engineering ,Transformer ,business ,law.invention - Abstract
In long-period running of switch cabinet, the temperature of contact points will be rose by the big contact resistance, poor contact and longtime overloading. Overheat can cause oxidation of contact points and the increasing of contact resistance, and then the contact may be generated the spark and arc discharge. That is a bad circle. So the temperature of contact points can affect the reliability of switch cabinet. For detecting the temperature of contacts and the switch cabinet’s environment in Yanjin transformer substation, we design an Insulated FBG temperature sensor. The surveys of upper reaches indicate that the temperature of moving contact A gets the maximum 32.98°C Aug.20, 2011, the temperature of stationary contact A gets the minimum 5.75°C, and the change temperature between contacts and environment gets the maximum 2.82°C. According to relevant state regulations, the contact’s temperature of 70 °C and temperature’s changes of 35 °C in the case of environment’s temperature below 40°C are Alarm threshold value of switch cabinet.
- Published
- 2012
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16. Has Hiroshima Bombing Continued?
- Author
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Yohannes Hawaz and Tesfaye Kebede
- Subjects
Earth surface ,Change temperature ,History ,Little Boy ,Human use ,World War II ,Curie ,Induced radioactivity ,social sciences ,Ancient history ,Atomic Bombs ,humanities - Abstract
There is increased use of nuclear energy after the Second World War which results in increase in artificial radioactivity on our planet. The objective of this article is to show the estimated amount of artificial radioactivity on earth surface and its effect by comparing it with the radioactive decay which took place in Hiroshima bombing by 'little boy'. There is estimated amount of 100 trillion curie of radioactivity on earth surface for human use. This man made radioactivity on earth surface has capacity to change temperature of the earth by 0.97 o C if heat is evenly distributed and unfortunately Hiroshima bombing did not stop but continued at rate of 39 'little boy' bombing of the earth per second. Every second 39 atomic bombs of 'little boy' size are dropped. One can see the large amount of bombing taking place on the earth by artificial radioactivity and the bombing should be stopped and further analysis of artificial radioactivity should also be done.
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- 2013
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17. Novel behaviors of anomalous Hall effect in TbFeCo ferrimagnetic thin films
- Author
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Takashi Komine, Shiori Sato, Yoshiaki Hara, Ryo Ando, and Shingo Kaneta
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010302 applied physics ,Materials science ,Condensed matter physics ,General Physics and Astronomy ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,lcsh:QC1-999 ,Change temperature ,Magnetic anisotropy ,Hall effect ,Ferrimagnetism ,0103 physical sciences ,Phase model ,Thin film ,0210 nano-technology ,Anisotropy ,lcsh:Physics ,Sign (mathematics) - Abstract
We investigate the temperature dependence and the thickness dependence of anomalous Hall effect (AHE) of TbFeCo ultra-thin films under high magnetic field. The sign change on temperature dependence of AHE in 20nm-thick TbFeCo film with rare-earth (RE) rich composition was observed. The AHE sign at low temperature is negative while it gradually becomes positive as the temperature increases. Moreover, the AHE sign for 5nm-thick TbFeCo film remains positive while that for 50nm-thick TbFeCo film remains negative at temperature in the range from 5 K to 400 K. The similar thickness dependence of AHE in TM-rich samples was also observed. From the mean-field approximation, the sign change temperature in AHE is related to the compensation temperature and the existence of interfacial region, which has the TM-rich composition and the weak anisotropy. Therefore, We clarified that the novel behavior of AHE sign changes in TbFeCo thin films with different thickness can be explained by the interfacial layer with weak anisotropy and two phase model.
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- 2018
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18. A calibration test for latent fingerprint development on thermal paper
- Author
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John W. Bond and Caroline A. Spencer
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Normal color ,Materials science ,business.industry ,Fingerprint (computing) ,Thermal paper ,Calibration test ,Latent fingerprint ,Pathology and Forensic Medicine ,Change temperature ,Genetics ,Calibration ,Development (differential geometry) ,Process engineering ,business ,Simulation - Abstract
A calibration test is described for monitoring the operation of equipment used to develop latent fingerprints on thermal paper by the application of either controlled or uncontrolled heat. A working solution of a water/glycerol emulsion and butylene glycol is applied to thermal paper by means of either a vinyl stamp and pad, or a marker pen. Varying the amount of butylene glycol enables the thermal paper to change color at different temperatures between approximately 40 and 60°C, which is below the normal color change temperature of the paper. The described test may be used to verify the correct operation, at different temperatures, of a controlled heat source during and after fingerprint development (such as the Hot Print System) or to monitor the paper temperature with an uncontrolled heat source (such as a warm air blower), thereby avoiding unintentional coloring of the entire paper surface.
- Published
- 2013
19. Cyclic phase change with fluid flow
- Author
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C. R. Swaminathan, Vaughan R Voller, and P. Felix
- Subjects
Materials science ,Applied Mathematics ,Mechanical Engineering ,Enthalpy ,Thermodynamics ,Thermal conduction ,Computer Science Applications ,Phase change ,Change temperature ,Mechanics of Materials ,Phase (matter) ,Fluid dynamics ,Melting point ,Liquid interface - Abstract
Cyclic phase change involves the successive freezing and melting of a region driven by a boundary temperature that cycles above and below the solid/liquid phase change temperature. In this paper, a recently proposed fixed grid phase change enthalpy method is modified and applied to cyclic solid/liquid phase change problems. The basic approach is demonstrated on application to a one‐dimensional, heat conduction controlled phase change. Then the method is used to investigate a cyclic phase change problem that involves fluid flow. The interaction of the melting and freezing with the phase change leads to some interesting predictions for the location and shape of the solid/liquid interface. The results also indicate that melting cycles are more effective than freezing cycles.
- Published
- 1996
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20. Summer daily peak load forecasting considering accumulation effect and abrupt change of temperature
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Yangsheng Liu, Jingjie Huang, and Yinhong Li
- Subjects
Change temperature ,Human comfort ,Meteorology ,Peak load ,Power load ,Load forecasting ,Environmental science ,Humidity ,Temperature difference ,Precipitation ,Atmospheric sciences - Abstract
For the distinctive power load and resource characteristics in an area, the relationship is analyzed between regional peak load and typical meteorological factors in summer. The forecasting model for daily peak load in summer is established, considering not only the general meteorological factors such as season, temperature, humidity, precipitation and the continuous sunny days, but also the persistent drought, the average temperature difference, the atmospheric conditions, human comfort and other factors. Particularly, due to the prolonged heat or abrupt change, the forecasting model is revised using the accumulation effect with high temperature and substitute average value for the abrupt change temperature. The calculated results show that the revised forecasting model is more accurate and feasible.
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- 2012
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21. Combustion wave propagation through deformed solids
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A. G. Knyazeva
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Materials science ,Wave propagation ,General Chemical Engineering ,General Physics and Astronomy ,Energy Engineering and Power Technology ,Thermodynamics ,General Chemistry ,Mechanics ,Combustion ,Physics::Fluid Dynamics ,Change temperature ,Fuel Technology ,Exponential stability ,Thermal ,Stability loss ,Physics::Chemical Physics ,Coherence (physics) - Abstract
A one-dimensional model for combustion wave propagation in deformed media is proposed taking into account the coherence of the deformation and temperature fields. It is shown that stresses and deformations change temperature profiles in the steady-state combustion wave and the conditions of steady-state combustion wave stability loss. The concept of the thermomechanical loss of combustion wave stability is introduced, which can occur before the thermal loss of combustion stability. It is shown that the coherence of deformation and temperature fields can be the reason for the exponential stability loss.
- Published
- 1993
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22. Temperature distribution in a nailed gypsum-stud joint exposed to fire
- Author
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Robert H. White, Robert J. Leichti, and James J. Fuller
- Subjects
Engineering ,Gypsum ,integumentary system ,Polymers and Plastics ,business.industry ,Metals and Alloys ,Stiffness ,General Chemistry ,Structural engineering ,Fire safety ,engineering.material ,Fire effect ,Sandwich board ,Electronic, Optical and Magnetic Materials ,Change temperature ,Framing (construction) ,Ceramics and Composites ,medicine ,medicine.symptom ,skin and connective tissue diseases ,business ,Heat flow - Abstract
Performance of wood-stud walls depends on the integrity of nailed connections between the sheathing and the framing members. The performance of nailed connections has been studied at room temperature, but the effects of intense thermal loads, such as those from fire, are still poorly understood. This study examines the temperature distribution within nailed joints exposed to fire; this information is essential in modeling strength and stiffness of connections in wall systems. The finite-element method was used to determine the effects of wood density, nail size, and type of gypsum board on temperature distribution within a set of connections. Temperature distributions were verified in nailed joints exposed in fire tests conducted in accordance with ASTM E119-88. The principal path of heat flow through the connection was along the nail, rather than directly through the interface between gypsum board and wood. Wood species, type of gypsum board, and nail length did not change temperature distribution significantly.
- Published
- 1992
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23. The Effect of an Unconditioned Barrel on Temperature Conditioned 5.56mm Cartridges
- Author
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Robert P. Kaste
- Subjects
Engineering ,business.industry ,Barrel (horology) ,Muzzle velocity ,law.invention ,Small arms ,Ammunition ,Cartridge ,Change temperature ,Magazine ,law ,Forensic engineering ,Composite material ,business ,Muzzle - Abstract
Several organizations independently tested the same lot of 5.56mm ammunition temperature conditioned to -55, 125, and 160 deg F and reported discrepancies in chamber pressures and muzzle velocities. These discrepancies precipitated this investigation into the time required to temperature condition 5.56mm ammunition and the effect of using an unconditioned weapon to fire conditioned ammunition. The unconditioned weapon dramatically affected the temperature of the conditioned ammunition. Substantial changes in the cartridge temperature occurred when the cartridge remained in the chamber, even for a short time. Cartridges loaded into a 30 round magazine took about 3 times as long to change temperature as did single rounds.
- Published
- 2009
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24. Downscaling future climate change: temperature scenarios for the Mediterranean area
- Author
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Jucundus Jacobeit and Elke Hertig
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Mediterranean climate ,Global and Planetary Change ,Change temperature ,Climatology ,General Circulation Model ,Climate change ,Mediterranean area ,Environmental science ,Future climate ,Oceanography ,Downscaling ,HadCM3 - Abstract
For the assessment of Mediterranean temperature under anthropogenically forced climate conditions canonical correlation models are established for the 1948–98 period between highly resolved Mediterranean temperatures and large-scale North-Atlantic–European 1000 hPa-/500 hPa-geopotential height fields. Predictor output from two different global general circulation model runs (ECHAM4/OPYC3 and HadCM3), both forced with B2 scenario assumptions according to the Special Report on Emission Scenarios (SRES), is used to assess Mediterranean temperature changes in the 21st century. The results show a temperature increase for the whole Mediterranean area for all months of the year in the period 2071–2100 compared to 1990–2019. The assessed temperature rise varies depending on region and season, but overall substantial temperature changes of partly more than 4 °C by the end of this century have to be anticipated under enhanced greenhouse warming conditions.
- Published
- 2008
25. Modeling of Superelastic Adaptive Composites
- Author
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Alexander L. Roytburd and Julia Slutsker
- Subjects
Stress (mechanics) ,Change temperature ,Materials science ,visual_art ,Composite number ,Electronic component ,Active component ,visual_art.visual_art_medium ,Shape-memory alloy ,Composite material ,SMA - Abstract
An adaptive composite containing a shape memory alloy as an active component is the subject of the paper. This composite utilizes the unique properties of shape memory alloys (SMA), which change their crystalline structure in response to the change temperature and stress. Previous research shows that the combination of a shape memory alloy as an active and the elastic material as a passive components allows one to improve the properties of the SMA itself (create two-way shape memory) and to engineer a composite material with controlled superelastic properties [1,2].
- Published
- 2002
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26. J0560104 Thermal fatigue of pipes induced by fluid temperature change : Temperature fluctuation evaluation at pipe wall using fluid-structure coupled simulation
- Author
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Koji Miyoshi, Akira Nakamura, Yoichi Utanohara, and Naoto Kasahara
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Thermal fatigue ,Change temperature ,Materials science ,Fluid temperature ,Composite material - Published
- 2014
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27. The particular behaviour of Listeria monocytogenes under sub-optimal conditions
- Author
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L. Rosso, G. Fardel, S. Bajard, Jean-Pierre Flandrois, Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Bioinformatique, phylogénie et génomique évolutive (BPGE), Département PEGASE [LBBE] (PEGASE), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE)
- Subjects
Specific growth ,0303 health sciences ,[SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT] ,030306 microbiology ,Microorganism ,Temperature ,General Medicine ,Atmospheric temperature range ,Biology ,General relationship ,medicine.disease_cause ,Listeria monocytogenes ,Microbiology ,Cold Temperature ,03 medical and health sciences ,Change temperature ,medicine ,Growth rate ,Food science ,Pathogenic microorganism ,030304 developmental biology ,Food Science - Abstract
Listeria monocytogenes is a ubiquitous pathogenic microorganism which has been described as growing at temperatures of interest to food production and especially at low temperatures (-2 degrees to 8 degrees C) in storage process. However, the general relationship between the maximum specific growth rate, mumax and temperature has not often been studied for L. monocytogenes in the whole temperature range from minimal to maximal growth temperature. A global analysis of this relationship for temperatures between -2 degrees C and 42 degrees C was therefore done. The global shape of this relationship was that usually observed for microorganisms, especially in the neighbourhood of the optimal temperature, Topt. But a more detailed study showed the existence of a so-called "change temperature", occurring between 10 degrees and 15 degrees C, below which L. monocytogenes grows faster than one would expect. This implies that the minimal growth temperature of both studied strains of L. monocytogenes is lower than expected.
- Published
- 1996
28. Risk of sea-change in the Atlantic
- Author
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Stefan Rahmstorf
- Subjects
Convection ,Change temperature ,Multidisciplinary ,Meteorology ,Greenhouse gas ,Ocean current ,Environmental science ,Current (fluid) ,Atmospheric sciences - Abstract
Europe is warmed by the North Atlantic Current, part of a system of warm and cool ocean currents that is driven by convective overturning at the northern end of the Atlantic. But human emissions of greenhouse gases could change temperature and rainfall patterns enough to stop this circulation, and so radically alter the regional climate. The rate of greenhouse-gas increase may be as important as the final concentrations reached.Europe is warmed by the North Atlantic Current, part of a system of warm and cool ocean currents that is driven by convective overturning at the northern end of the Atlantic. But human emissions of greenhouse gases could change temperature and rainfall patterns enough to stop this circulation, and so radically alter the regional climate. The rate of greenhouse-gas increase may be as important as the final concentrations reached.
- Published
- 1997
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29. Cryomicroscopic studies of the freezing of model solutions of cryobiological interest
- Author
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D.S. Reid
- Subjects
Microscope ,Temperature control ,business.industry ,Cold tolerance ,Computer science ,General Medicine ,Operational requirements ,General Biochemistry, Genetics and Molecular Biology ,law.invention ,Degree (temperature) ,Change temperature ,law ,General Agricultural and Biological Sciences ,Process engineering ,business - Abstract
Cryomicroscopy is the study, by microscopy, as they happen, of events occurring at subzero temperatures. The techniques employed can be very simple, or extremely complex. In its simplest form, cryomicroscopy consists of sitting a microscope in a cold room. The lack of cold tolerance of most microscopists is a serious limitation to this method, but it is a method with a long and honorable history. A more flexible, and more comfortable, approach is to equip a microscope with a special, temperature-controlled stage. A variety of such stages exists, and many are discussed by Diller (I). The degree of sophistication required in the design of such stages is in part determined by their operational requirements. Stages which are required to have close temperature control, together with an ability to change temperature very rapidly while still maintaining control, are more demanding in their construction. Stages for which the required temperature control is less or which need only produce intermediate rates of controlled temperature change are simpler. The freezing and thawing processes of aqueous biological systems can often be studied using a cryomicroscope. Although simply observing through the microscope can be an entertaining pastime, it is necessary to attempt to identify and characterize at least the key processes. In corn
- Published
- 1984
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30. Post-Processing Temperature Rise in Foods: Conventional Hot Air and Microwave Ovens
- Author
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Carol A. Sawyer
- Subjects
Change temperature ,Materials science ,Food science ,Microbiology ,Microwave ,Food Science - Abstract
Measurement of temperature rise (N = 5 replications) in water (1000 ml), chicken frankfurters (46 ± 2 g/frankfurter) and cake cones (40 g/cone) after conventional hot air (160°C) and after microwave (2450 MHz; 50% and 100% power of 645 ± 25 W) processing indicated that temperature rise occurred more often in products heat-processed in microwave than in hot air ovens. Duration and extent of post-processing temperature rise (PPTR) in beef loaf patties (150 g/patty), pork and turkey roasts (approximately 2.3 kg/roast) and turkey casserole (0.9 kg/casserole) prepared in microwave ovens was quantified during three replications. Although present, PPTR should not change temperature objectives for domestic microwave processing of foods because of the extensive variability of duration and extent in PPTR within and among experimental products tested. However, PPTR should be given consideration when commercial products to be processed in microwave ovens and those used in mathematical modeling of microwave cooking/heating procedures are designed.
- Published
- 1985
- Full Text
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31. Variation in thermal conductivity of organic substances in melting phase changes
- Author
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A. F. Chudnovskii, V. G. Surin, and B. M. Mogilevskii
- Subjects
chemistry.chemical_classification ,Materials science ,Mechanical Engineering ,General Chemical Engineering ,Thermodynamics ,Organic compound ,Change temperature ,Phase change ,Thermal conductivity ,chemistry ,Phase change temperature ,Phase (matter) ,sense organs ,skin and connective tissue diseases ,Thermal analysis ,Variation (astronomy) - Abstract
The thermal conductivity of 15 organic compounds near the melting phase change temperature is studied experimentally. An evaluation of the variation in thermal conductivity accompanying these phase changes is conducted.
- Published
- 1971
- Full Text
- View/download PDF
32. Some approximate solutions of stefan's problem
- Author
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V. M. Kravchuk and E. M. Kravchuk
- Subjects
Mechanical Engineering ,General Chemical Engineering ,Mathematical analysis ,General Engineering ,Complex system ,Expression (computer science) ,Condensed Matter Physics ,Change temperature ,Quadratic equation ,Distribution (mathematics) ,Phase change temperature ,Phase (matter) ,Boundary value problem ,Mathematics - Abstract
We obtain approximate solutions of Stefan's problem for various boundary conditions and for an initial temperature equal to the phase change temperature; the distribution of temperature along a coordinate direction in a region of increasing phase is given in the form of a quadratic expression.
- Published
- 1971
- Full Text
- View/download PDF
33. Effect of naloxone injected into the lateral cerebral ventricle on the arterial baroreflex sensitivity during heat stress-induced hyperthermia in rabbits
- Author
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Yu Cg, J Zhang, Liu Wx, and Yang K
- Subjects
Hyperthermia ,Mean arterial pressure ,Hot Temperature ,Fever ,business.industry ,Naloxone ,Arterial baroreflex ,Blood Pressure ,Pressoreceptors ,(+)-Naloxone ,medicine.disease ,Heat stress ,Change temperature ,Stress, Physiological ,Management of Technology and Innovation ,Anesthesia ,Cerebral ventricle ,medicine ,Animals ,Rabbits ,business ,Endogenous opioid ,Injections, Intraventricular - Abstract
The rabbits anaesthetized with urethane were made hyperthermic under heat stress. Effect of naloxone injected intracerebroventricularly on arterial baroreflex sensitivity (ABS) was investigated. The experimental animals were divided into two groups: the control and the naloxone-treated group. ABS decreased stepwisely in the control group when rectal temperature rose to over 40 °C. Mean arterial pressure (MAP) dropped markedly beyond 42°C. However, in the naloxone-treated group, ABS showed no significant change temperature reached 42°C. but it decreased dramatically at 43°C. Then, MAP was still maintained at about 90 mmHg. The results suggested that the marked reduction of ABS during hyperthermia might be related to endogenous opioid release.
- Published
- 1987
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