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Sojourner adjustment

Xiaolong Yang, Xuezhi Tan, Liang Ye, Lin Ma
Cognitive radio can significantly improve the spectrum efficiency, and spectrum handoff is considered as an important functionality to guarantee the quality of service (QoS) of primary users (PUs) and the continuity of data transmission of secondary users (SUs). In this paper, we propose an analytical framework based on a preemptive repeat identical (PRI) M/G/1 queuing network model to characterize spectrum handoff behaviors with general service time distribution of both primary and secondary connections, multiple interruptions and transmission delay resulting from the appearance of primary connections...
2016: Sensors
Viren Swami
OBJECTIVE: The purpose of this investigation was to examine change in risk for eating disorders in higher education students sojourning in the United Kingdom (UK), as well as associations between such risk and experiences in the host culture. METHOD: Participants were 98 female students from Malaysia, who completed a measure of risk factors for eating disorder symptomatology (the Eating Disorder Inventory-3 subscales of drive for thinness, body dissatisfaction, and bulimia symptoms) at two time points: two months prior to beginning their sojourn in the UK (Time 1) and four months after the sojourn began (Time 2)...
July 2016: International Journal of Eating Disorders
Alexander S English, Zhi Jia Zeng, Jian Hong Ma
Answering the call for research on coping outside of the Western world, the present study confirms previous research that indicated Asians cope with stress differently from other ethnic groups. In the present study, we explore the stress-coping-adjustment model and its role in acculturation for educational sojourners in the People's Republic of China. Using a sample of 121 recent exchange students (Asian, n = 52; non-Asian, n = 69), we administered surveys in the Fall of 2013 and 90 days later to measure students' socio-cultural adaptation...
2015: SpringerPlus
Hla-Hla Thein, Michael A Campitelli, Latifa T Yeung, Ahmad Zaheen, Eric M Yoshida, Craig C Earle
The optimal schedule for ultrasonographic surveillance of patients with viral hepatitis for the detection of hepatocellular carcinoma (HCC) remains unclear owing to a lack of reliable studies. We examined the timing of ultrasonography in patients with viral hepatitis-induced HCC and its impact on survival and mortality risk while determining predictors of receiving surveillance before HCC diagnosis. A population-based retrospective cohort analysis of patients with viral hepatitis-induced HCC in Ontario between 2000 and 2010 was performed using data from the Ontario Cancer Registry linked health administrative data...
2015: PloS One
Kali A Demes, Nicolas Geeraert
The impact of living abroad is a topic that has intrigued researchers for almost a century, if not longer. While many acculturation phenomena have been studied over this time, the development of new research methods and statistical software in recent years means that these can be revisited and examined in a more rigorous manner. In the present study we were able to follow approximately 2,500 intercultural exchange students situated in over 50 different countries worldwide, over time both before and during their travel using online surveys...
August 2015: Journal of Personality and Social Psychology
Max Gassmann, Martina U Muckenthaler
Adequate acclimatization time to enable adjustment to hypoxic conditions is one of the most important aspects for mountaineers ascending to high altitude. Accordingly, most reviews emphasize mechanisms that cope with reduced oxygen supply. However, during sojourns to high altitude adjustment to elevated iron demand is equally critical. Thus in this review we focus on the interaction between oxygen and iron homeostasis. We review the role of iron 1) in the oxygen sensing process and erythropoietin (Epo) synthesis, 2) in gene expression control mediated by the hypoxia-inducible factor-2 (HIF-2), and 3) as an oxygen carrier in hemoglobin, myoglobin, and cytochromes...
December 15, 2015: Journal of Applied Physiology
Konrad E Bloch, Tsogyal D Latshang, Silvia Ulrich
Bloch, Konrad E., Tsogyal D. Latshang, and Silvia Ulrich. Patients with obstructive sleep apnea at altitude. High Alt Med Biol 16:110-116, 2015.--Obstructive sleep apnea (OSA) is highly prevalent in the general population, in particular in men and women of older age. In OSA patients sleeping near sea level, the apneas/hypopneas associated with intermittent hypoxemia are predominantly due to upper airway collapse. When OSA patients stay at altitudes above 1600 m, corresponding to that of many tourist destinations, hypobaric hypoxia promotes frequent central apneas in addition to obstructive events, resulting in combined intermittent and sustained hypoxia...
June 2015: High Altitude Medicine & Biology
Laura Altweck, Tara C Marshall
Many repatriates find it challenging to readjust to their heritage culture after spending a significant period of time abroad. Research on predictors of readjustment, however, remains limited. The present study in particular investigated the identification of third culture individuals (TCIs) - that is, individuals who spent their formative years outside of their heritage culture - with an abstract, third culture. Our findings demonstrated that TCIs' identification with the third culture was empirically distinct from that of the heritage and host cultures...
2015: PloS One
Sabina Rinaldi, Martyn Plummer, Carine Biessy, Konstantinos K Tsilidis, Jane Nautrup Østergaard, Kim Overvad, Anne Tjønneland, Jytte Halkjaer, Marie-Christine Boutron-Ruault, Françoise Clavel-Chapelon, Laure Dossus, Rudolf Kaaks, Annekatrin Lukanova, Heiner Boeing, Antonia Trichopoulou, Pagona Lagiou, Dimitrios Trichopoulos, Domenico Palli, Claudia Agnoli, Rosario Tumino, Paolo Vineis, Salvatore Panico, H Bas Bueno-de-Mesquita, Petra H Peeters, Elisabete Weiderpass, Eiliv Lund, J Ramón Quirós, Antonio Agudo, Esther Molina, Nerea Larrañaga, Carmen Navarro, Eva Ardanaz, Jonas Manjer, Martin Almquist, Maria Sandström, Joakim Hennings, Kay-Tee Khaw, Julie Schmidt, Ruth C Travis, Graham Byrnes, Augustin Scalbert, Isabelle Romieu, Marc Gunter, Elio Riboli, Silvia Franceschi
BACKGROUND: Increased levels of thyroglobulin (Tg) and thyroid-stimulating hormone (TSH) are associated with differentiated thyroid carcinoma (TC) risk, but strong epidemiological evidence is lacking. METHODS: Three hundred fifty-seven incident TC case patients (n = 300 women and 57 men; mean age at blood collection = 51.5 years) were identified in the EPIC cohort study and matched with 2 (women) or 3 (men) control subjects using incidence density sampling. Matching included study center, sex, age, date, time, and fasting status at blood collection...
June 2014: Journal of the National Cancer Institute
S Hettrich, A N Dinkelaker, N Sejkora, I Pfeil, Q Scornet, L Moser, A Boyd, R Terlevic, U Luger
On future human Mars missions, surface sojourn duration and resources will be limited. One possibility to approach a positive cost-benefit ratio of a human Mars mission will be to maximize the scientific research on the martian surface within the operational, environmental, and experimental limitations. Sophisticated mission operations and advanced planning strategies will be a basic requirement for Mars exploration and make operational methods an important research subject during current Mars analog missions conducted by the Austrian Space Forum...
May 2014: Astrobiology
Dzmitry Hlushkou, Fabrice Gritti, Georges Guiochon, Andreas Seidel-Morgenstern, Ulrich Tallarek
We report on results obtained with a microscopic modeling approach to Taylor-Aris dispersion in a tube coupled with adsorption-desorption processes at its inner surface. The retention factor of an adsorbed solute is constructed by independent adjustment of the adsorption probability and mean adsorption sojourn time. The presented three-dimensional modeling approach can realize any microscopic model of the adsorption kinetics based on a distribution of adsorption sojourn times expressed in analytical or numerical form...
May 6, 2014: Analytical Chemistry
Marco Paganini, Annibale Biggeri, Anna Maria Romoli, Claudia Mechi, Elena Ghelli, Valentina Berti, Silvia Pradella, Sandra Bucciantini, Dolores Catelan, Riccardo Saccardi, Letizia Lombardini, Mario Mascalchi, Luca Massacesi, Berardino Porfirio, Nicola Di Lorenzo, Gabriella Barbara Vannelli, Pasquale Gallina
OBJECTIVE: To assess the clinical effect of caudate-putaminal transplantation of fetal striatal tissue in Huntington's disease (HD). METHODS: We carried out a follow-up study on 10 HD transplanted patients and 16 HD not-transplanted patients. All patients were evaluated with the Unified HD Rating Scale (UHDRS) whose change in motor, cognitive, behavioural and functional capacity total scores were considered as outcome measures. Grafted patients also received morphological and molecular neuroimaging...
September 2014: Journal of Neurology, Neurosurgery, and Psychiatry
Jaimie F Borisoff, Johanne Mattie, Vince Rafer
Wheelchair use has consequences to quality of life in at least two areas: 1) health issues such as pressure sores and chronic overuse injury; and 2) access problems due to the inaccessible nature of the built and natural environments that are most amenable to upright postures. Even with these concerns, wheelchairs are still the best form of mobility for many people (e.g. they are relatively easy to transfer into and propel). However, wheelchairs are simply not transformative, i.e. they do not allow a person with a disability to attain a level of mobility performance that approaches that of their non-disabled peers, nor do they typically allow for face to face interactions and full participation in the community...
June 2013: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
K H X Tan, L Simonella, H L Wee, A Roellin, Y-W Lim, W-Y Lim, K S Chia, M Hartman, A R Cook
BACKGROUND: Natural history models of breast cancer progression provide an opportunity to evaluate and identify optimal screening scenarios. This paper describes a detailed Markov model characterising breast cancer tumour progression. METHODS: Breast cancer is modelled by a 13-state continuous-time Markov model. The model differentiates between indolent and aggressive ductal carcinomas in situ tumours, and aggressive tumours of different sizes. We compared such aggressive cancers, that is, which are non-indolent, to those which are non-growing and regressing...
October 15, 2013: British Journal of Cancer
Pablo Chavajay
This study investigated the extent and sources of perceived social support among international students attending a northeastern university in the United States. Using the Index of Sojourner Social Support Scale, international students reported perceiving greater socioemotional and instrumental support from other international people than from Americans. Results also indicated that younger international students perceived more socioemotional and instrumental support from others than did older international students...
April 2013: Psychological Reports
Dagmar M Hajducek, J F Lawless
We consider survival or duration times associated with spells (sojourns in some state) or events experienced by individuals in a population over a specified time period. Duration distributions can be estimated from data recorded during followup of panel members in longitudinal surveys, but adjustments for the sample design, population structure and losses to followup are typically required. We provided weighted Kaplan-Meier estimates that allow for these features and, in particular, adjust for dependent loss to followup through the use of inverse probability of censoring weights...
July 2013: Lifetime Data Analysis
E Georg Luebeck, Kit Curtius, Jihyoun Jeon, William D Hazelton
Cancer arises through a multistage process, but it is not fully clear how this process influences the age-specific incidence curve. Studies of colorectal and pancreatic cancer using the multistage clonal expansion (MSCE) model have identified two phases of the incidence curves. One phase is linear, beginning about age of 60 years, suggesting that at least two rare rate-limiting mutations occur before clonal expansion of premalignant cells. A second phase is exponential, seen in early-onset cancers occurring before the age of 60 years that are associated with premalignant clonal expansion...
February 1, 2013: Cancer Research
Eric R Pedersen, Clayton Neighbors, Christine M Lee, Mary E Larimer
OBJECTIVE: American students studying in foreign countries represent a unique group at risk for increased and problematic drinking. Examination of risk and protective factors for negative alcohol-related consequences can lead to the development of efficacious preventive interventions for reducing high-risk drinking while abroad. The present study examined the relationship between sojourner adjustment (i.e., the sociocultural and psychological adjustment of short-term residents in foreign environments), drinking motives, and alcohol-related consequences...
November 2012: Journal of Studies on Alcohol and Drugs
Ruby Pi-Ju Yang, Kimberly A Noels
We assessed 93 international students' reports of their expected and feared possible selves in terms of their thematic content and configuration, and examined the relations between possible selves and cultural adjustment in Canada. The results showed that international students mostly envisioned possible selves in career, education, intrapersonal, and interpersonal domains, and reported more balanced configurations than matched configurations of possible selves. Balanced possible selves in the educational domain were associated with better psychological well-being, but balanced selves in the intrapersonal domains were linked with more frequent sociocultural difficulties...
2013: International Journal of Psychology: Journal International de Psychologie
Eric R Pedersen, Clayton Neighbors, Mary E Larimer, Christine M Lee
The literature on "Sojourner Adjustment," a term expanding on the acculturation concept to apply to groups residing temporarily in foreign environments, suggests that engagement, participation, and temporary integration into the host culture may contribute to less psychological and sociocultural difficulty while abroad. The present study was designed to establish a brief multi-component measure of Sojourner Adjustment (the Sojourner Adjustment Measure; SAM) to be used in work with populations residing temporarily in foreign environments (e...
November 2011: International Journal of Intercultural Relations: IJIR
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