نتایج جستجو برای: dimensional changes

تعداد نتایج: 1252272  

2016
Preetpal Singh Cher Ming Tan

A moisture- electrical - temperature (MET) test is proposed to evaluate the outdoor reliability of high power blue LEDs, with and without phosphor, and to understand the degradation physics of LEDs under the environment of combined humidity, temperature and electrical stresses. The blue LEDs with phosphor will be the high power white LEDs. Scanning acoustic microscopy is used to examine the res...

2017
Natalie Riedel Johannes Siegrist Natalia Wege Adrian Loerbroks Peter Angerer Jian Li

It has been suggested that work characteristics, such as mental demands, job control, and occupational complexity, are prospectively related to cognitive function. However, current evidence on links between psychosocial working conditions and cognitive change over time is inconsistent. In this study, we applied the effort-reward imbalance model that allows to build on previous research on menta...

Journal: :Journal of personality and social psychology 2005
Ravenna Helson Christopher J Soto

It is proposed that personality (conceptualized in terms of motives and psychological resources) changes normatively not only from young adulthood to middle age but also within middle age and that these changes take place in relation to social and biosocial change over the same period. Data from 123 women studied at ages 27, 43, 52, and 61 largely supported hypotheses about change in social rol...

Journal: :The British journal of educational psychology 2005
Lillian M Fawcett Alison F Garton

BACKGROUND A Vygotskian framework links cognitive change to collaborative interaction with a more competent partner whereas a Piagetian perspective supports the view that cognitive conflict arising from peer interaction leads to cognitive change. AIMS The study investigated the effect of collaborative learning on children's problem-solving ability and whether differences in knowledge status o...

Journal: :Cognition 2011
Laura T Germine Bradley Duchaine Ken Nakayama

Research on age-related cognitive change traditionally focuses on either development or aging, where development ends with adulthood and aging begins around 55 years. This approach ignores age-related changes during the 35 years in-between, implying that this period is uninformative. Here we investigated face recognition as an ability that may mature late relative to other abilities. Using data...

Journal: :Respiratory physiology & neurobiology 2009
H-C Gunga A Werner A Stahn M Steinach T Schlabs E Koralewski D Kunz D L Belavý D Felsenberg F Sattler J Koch

The objective of our study was to establish whether rectal temperature recordings in humans could be replaced by a non-invasive skin temperature sensor combined with a heat flux sensor (Double Sensor) located at the forehead to monitor core body temperature changes due to circadian rhythms. Rectal and Double Sensor data were collected continuously for 24h in seven men undertaking strict head-do...

Journal: :Journal of aging and health 2013
Michael Marsiske Joseph M Dzierzewski Kelsey R Thomas Linda Kasten Richard N Jones Kathy E Johnson Sherry L Willis Keith E Whitfield Karlene K Ball George W Rebok

OBJECTIVE The current study examined a 5-year cognitive change in untrained African American and White participants from the Advanced Cognitive Training in Independent and Vital Elderly (ACTIVE) study. METHOD Five-year trajectories of memory, reasoning, visual processing speed/useful field of view, digit-symbol substitution, and vocabulary were investigated. Education, health, gender, age, an...

Journal: :British journal of psychology 2007
Patrick C L Heaven Joseph Ciarrochi

Using three waves of data, we assessed the relationships between endorsement of religious values, some of the major personality dimensions, and social and emotional well-being amongst teenagers. Participants were 784 high school students at Time 1 (382 males and 394 females; 8 did not indicate their gender) and 563 provided data at each of Time 1, Time 2 and Time 3. We examined the impact of ch...

Journal: :iranian journal of public health 0
kee-sang hong youn-soo shim so-young park ah- hyeon kim so-youn an

no abstract/

Journal: :iranian journal of medical physics 0
hadis ansari mehr1 department of medical radiation engineering, science and research branch, islamic azad university, tehran, iran

introduction the use of cut-outs in electron applicators make changes on output, isodose, and percentage depth dose (pdd) curves. these changes and electron beam dose distribution in the form of three-dimensional (3d) can be measured by gel dosimeters. materials and methods dosimetry was performed with and without a square shield (6×6 cm2 field). the energies were 4, 9, and 16 mev and phantom w...

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