WorldWideScience

Sample records for chauffeurs

  1. The determinants and engagement patterns of chaperones and chauffeurs by Australian doctors in after-hours house-call services

    Directory of Open Access Journals (Sweden)

    Chris Onyebuchi Ifediora

    2017-04-01

    Full Text Available Objectives The use of escorts (chauffeurs and chaperones while on duty in after-hours-house-call (AHHC is one key protective option available to doctors in the service, and has been linked to low burnout and increased satisfaction in AHHC. This study aims to explore the patterns of engagement of escorts in Australian AHHC. Method This is a questionnaire-based, electronic survey of all 300 doctors involved in AHHC through the National Home Doctor Service (NHDS, Australia’s largest providers of the service. The survey explored the doctor’s experiences over the 12-month period from October 2013 to September 2014. Results This survey received a total of 168 valid responses, giving a response rate of 56%. Nearly 61% of the doctors involved in AHHC engaged escorts (chauffeurs and chaperones. Of those doctors that engage chauffeurs, three-quarters do so “all or most times”, while only one-quarter engaged chaperones to the same degree of frequency. Hiring escorts is very popular among Brisbane (91.7% and Sydney-based (88.2% practitioners, but is unpopular in the City of Gold Coast (26.1%. There were moderate patronages in Adelaide (52.9% and Melbourne Area (46.4%. Compared to males, females were less likely to drive themselves without escorts (OR 0.20; P < 0.01; CI [0.07–0.57], but more likely to engage chauffeurs (OR 5.87; P = 0.03; CI [1.16–29.77]. Practitioners who were apprehensive were three times more likely to either engage escorts as chauffeurs (OR 3.10; P = 0.04; CI [1.05–9.15] or as an accompanying chaperone if they self-drive (OR 3.03; P = 0.02; CI [1.16–7.89]. Conclusion More needs to be done to increase the engagement of escorts by doctors involved in the Australian AHHC, particularly given their proven benefits in the service. Future studies may be needed to fully explore the real reasons behind the significant associations identified in this study.

  2. The determinants and engagement patterns of chaperones and chauffeurs by Australian doctors in after-hours house-call services.

    Science.gov (United States)

    Ifediora, Chris Onyebuchi

    2017-01-01

    The use of escorts (chauffeurs and chaperones) while on duty in after-hours-house-call (AHHC) is one key protective option available to doctors in the service, and has been linked to low burnout and increased satisfaction in AHHC. This study aims to explore the patterns of engagement of escorts in Australian AHHC. This is a questionnaire-based, electronic survey of all 300 doctors involved in AHHC through the National Home Doctor Service (NHDS), Australia's largest providers of the service. The survey explored the doctor's experiences over the 12-month period from October 2013 to September 2014. This survey received a total of 168 valid responses, giving a response rate of 56%. Nearly 61% of the doctors involved in AHHC engaged escorts (chauffeurs and chaperones). Of those doctors that engage chauffeurs, three-quarters do so "all or most times", while only one-quarter engaged chaperones to the same degree of frequency. Hiring escorts is very popular among Brisbane (91.7%) and Sydney-based (88.2%) practitioners, but is unpopular in the City of Gold Coast (26.1%). There were moderate patronages in Adelaide (52.9%) and Melbourne Area (46.4%). Compared to males, females were less likely to drive themselves without escorts (OR 0.20; P  doctors involved in the Australian AHHC, particularly given their proven benefits in the service. Future studies may be needed to fully explore the real reasons behind the significant associations identified in this study.

  3. L’expression de l’affectivité d’un solitaire : le chauffeur de La Tournée d’automne

    Directory of Open Access Journals (Sweden)

    Liliana Sandu-Goilan

    2007-05-01

    Full Text Available Notre étude se propose d’analyser, en prenant comme exemple le roman « La tournée d’automne » de l’écrivain québécois Jacques Poulin, comment le protagoniste du récit poulinien exprime son affectivité à travers la communication verbale et non verbale. Le Chauffeur, comme tous les autres personnages de son univers romanesque, est un solitaire nomade à la recherche du bonheur et de la chaleur humaine. Il entreprend cette quête à travers les relations sociales (travail, amitié et amour qui le mettent en interaction avec d’autres individus et qui lui demandent des compétences sociales où l’attention portée à l’autre est capitale.

  4. My Most Memorable AAS Meeting, or How Stephen Hawking's Chauffeur and Chubby Wise's Fiddle Are Related to the Hubble Deep Field (At Least In My Mind and Experience!)

    Science.gov (United States)

    Lucas, R. A.

    1999-05-01

    Sometimes, in the most extraordinary conditions and times, strange things happen which remind us of just how small a world we really inhabit, and how so many varied things may suddenly be juxtaposed in our lives, and in the lives of others. My most memorable AAS meeting involves not only the meeting but events while getting there. It was January 1996, and we had just finished our observations and initial data reduction of the Hubble Deep Field, the members of the HDF working group doggedly coming in to the STScI by various means over the December holidays and the New Year, in the midst of several blizzards which even closed STScI for a number of days. Not surprisingly, work on the HDF AAS presentations was ongoing until the last minute, until people left snowy Baltimore for sunny San Antonio. My street was plowed for the first time in a week a few hours before my 6AM flight, so after digging out my car, with no time for sleep, between 3AM and 6AM on the morning I left, I soon discovered my own surprising connections between Stephen Hawking's chauffeur, Chubby Wise's fiddle, and the Hubble Deep Field. I'll elaborate in this paper if you're curious!

  5. access to adequate housing

    African Journals Online (AJOL)

    Nicola Smit

    chauffeurs and restaurant/hotel workers approached the Development Action ..... 10 Ibid. 11 Budget speech by LN Sisulu, Minister of Housing, 28 May 2008, available at .... exorbitantly high property prices in the Cape Town CBD and environs, ...

  6. Étude des obstacles au traitement du VIH et à la santé maternelle en ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    4 avr. 2013 ... Plus de 200 chercheurs en santé mondiale se sont réunis à Ottawa pour ... les facteurs qui entravent l'accès à des soins de santé en Afrique du Sud. ... de transport en commun et le refus des chauffeurs d'ambulance de se ...

  7. 26 CFR 1.217-1 - Deduction for moving expenses paid or incurred in taxable years beginning before January 1, 1970.

    Science.gov (United States)

    2010-04-01

    ..., nor an individual such as a servant, governess, chauffeur, nurse, valet, or personal attendant. (c... reimbursed $600 by M. After working for M for a period of 3 months, A becomes dissatisfied with the job and... return will become invalid if, as of the date prescribed by law for filing the return, it is not possible...

  8. Disturbing effect of free hydrogen on fuel combustion in internal combustion engines

    Science.gov (United States)

    Riedler, A

    1923-01-01

    Experiments with fuel mixtures of varying composition, have recently been conducted by the Motor Vehicle and Airplane Engine Testing Laboratories of the Royal Technical High School in Berlin and at Fort Hahneberg, as well as at numerous private engine works. The behavior of hydrogen during combustion in engines and its harmful effect under certain conditions, on the combustion in the engine cylinder are of general interest. Some of the results of these experiments are given here, in order to elucidate the main facts and explain much that is already a matter of experience with chauffeurs and pilots.

  9. The effects of driving cessation on the elderly with dementia and their caregivers.

    Science.gov (United States)

    Taylor, B D; Tripodes, S

    2001-07-01

    This research explores how the loss of driving privileges by impaired drivers affects households. The particular focus is on the travel behavior and preceptions of people living in households where an elderly driver has had his or her license revoked due to Alzheimer's disease or a related dementia. The data for this analysis were drawn from a 1996 survey of households in California which queried the caregivers of people with dementia on how the former drivers access necessary destinations once they can no longer drive, and on the difficulties faced by other household members in seeking alternative means of transportation. After losing their license, the vast majority of people surveyed depended on informal support systems for transportation, such as rides from family and friends. Although such arrangements were not reported to be a problem for the majority of households, certain groups of non-drivers reported difficulty accessing services, particularly social and recreational destinations. The most commonly reported problem was a lack of available licensed drivers to chauffeur non-drivers. Importantly, no increase was observed in the number of people walking, using public transit, taxis, or van services following license revocation. People who did not live with at least one licensed driver and those who were younger and healthier reported the greatest mismatch between their need and desire to travel and the availability of transportation. In addition, some caregivers reported that they frequently missed work or stopped working entirely in order to care for and chauffeur people in the former drivers' household. Overall, these findings reinforce the importance of both developing transportation policies to support the functioning of informal transportation structures and in improving the range of alternative transportation options for those individuals with particular disabilities--like dementia--who are not well served by either informal arrangements or by formal

  10. Rollover avoidance of Heavy Vehicles Using Sliding Mode Observer-Controller

    OpenAIRE

    IMINE, Hocine; MADANI, Tarek

    2010-01-01

    Le but du travail présenté ici consiste à mettre au point un système actif d'assistance à la conduite du chauffeur pour éviter le renversement du poids lourd. Un estimateur basé sur l'observateur à modes glissants est développé pour estimer les dynamiques du véhicule. L'accélération latérale limite est alors estimée et la position et la vitesse latérales sont contrôlées afin d'éviter le renversement du véhicule. Quelques résultats de simulations sont donnés pour montrer la robustesse et la...

  11. Règlement de compte à Mexico

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    Martine Amiot-Guigaz

    2006-01-01

    Full Text Available Mexico, un fait divers qui tourne mal. Marcos, chauffeur d’un général, kidnappe avec sa femme un enfant contre rançon ; mais l’enfant meurt accidentellement. Cette intrigue – somme toute assez banale – va servir de fil conducteur pour nous entraîner dans un monde noir et cru. Si l’on ne connaît pas le pays, on ne peut qu’être frappé par la vision que le cinéaste nous révèle d’une société mexicaine où ne règnent que corruption et dépravation. Qu’il s’agisse de métis ou de blancs, Carlos Reyga...

  12. Using travel socialization and underlying motivations to better understand motorcycle usage in Taiwan.

    Science.gov (United States)

    Chang, Hsin-Li; Lai, Chi-Yen

    2015-06-01

    This study introduces self-determination theory (SDT) to refine previous models of vehicle usage motivation. We add travel socialization theory regarding parental influence on vehicle usage to enhance previous structural models describing motorcycle usage behavior. Our newly developed model was empirically verified in a sample of 721 motorcycle users in Taiwan. In addition to instrumental, symbolic, and affective motivations, perceived parental attitudes (PPAs) towards motorcycle riding were found to have a significant effect on individuals' motorcycle use habits. Additionally, participants who perceived their parents to have more positive attitudes toward motorcycles were found to have more experience being chauffeured on motorcycles by their parents. Based on these results, we suggest means to confront the challenges brought on by the rapid growth of motorcycle usage, especially serious motorcycle traffic accidents. These results improve our understanding motorcycle usage in Taiwan and can be used by transportation professionals who are seeking solutions to the rapid growth of motorcycle usage. Copyright © 2015 Elsevier Ltd. All rights reserved.

  13. ÉTUDE COMPARATIVE SUR L’ÉVOLUTION DE L’ALCOOLÉMIE AU COURS DU TEMPS

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    Madalina Toma

    2007-12-01

    Full Text Available La consommation excessive d’alcool éthylique est connue depuis longtemps comme très dangereuse pour la santé humaine. De plus, l’alcool au volant représente, après la vitesse excessive, la deuxième cause d’accidents mortels sur la route. Quoique autorisé au volant à faibles doses dans certains pays, l’alcool met toujours en danger la vie du chauffeur et de ses passagers. Le taux d’alcool dans le sang, pour la même quantité d’éthanol consommée, varie en fonction de différents facteurs physiologiques. Il existe à l’heure actuelle de nombreuses modalités d’estimer l’évolution de l’alcoolémie au cours du temps. Nous avons essayé de démontrer que cette évolution présente une forte variabilité, en fonction du sexe, de l’age et de la physiologie individuelle

  14. Ethanol-Induced Changes in PKCε: From Cell to Behavior.

    Science.gov (United States)

    Pakri Mohamed, Rashidi M; Mokhtar, Mohd H; Yap, Ernie; Hanim, Athirah; Abdul Wahab, Norhazlina; Jaffar, Farah H F; Kumar, Jaya

    2018-01-01

    The long-term binge intake of ethanol causes neuroadaptive changes that lead to drinkers requiring higher amounts of ethanol to experience its effects. This neuroadaptation can be partly attributed to the modulation of numerous neurotransmitter receptors by the various protein kinases C (PKCs). PKCs are enzymes that control cellular activities by regulating other proteins via phosphorylation. Among the various isoforms of PKC, PKCε is the most implicated in ethanol-induced biochemical and behavioral changes. Ethanol exposure causes changes to PKCε expression and localization in various brain regions that mediate addiction-favoring plasticity. Ethanol works in conjunction with numerous upstream kinases and second messenger activators to affect cellular PKCε expression. Chauffeur proteins, such as receptors for activated C kinase (RACKs), cause the translocation of PKCε to aberrant sites and mediate ethanol-induced changes. In this article, we aim to review the following: the general structure and function of PKCε, ethanol-induced changes in PKCε expression, the regulation of ethanol-induced PKCε activities in DAG-dependent and DAG-independent environments, the mechanisms underlying PKCε-RACKε translocation in the presence of ethanol, and the existing literature on the role of PKCε in ethanol-induced neurobehavioral changes, with the goal of creating a working model upon which further research can build.

  15. Ethanol-Induced Changes in PKCε: From Cell to Behavior

    Directory of Open Access Journals (Sweden)

    Rashidi M. Pakri Mohamed

    2018-04-01

    Full Text Available The long-term binge intake of ethanol causes neuroadaptive changes that lead to drinkers requiring higher amounts of ethanol to experience its effects. This neuroadaptation can be partly attributed to the modulation of numerous neurotransmitter receptors by the various protein kinases C (PKCs. PKCs are enzymes that control cellular activities by regulating other proteins via phosphorylation. Among the various isoforms of PKC, PKCε is the most implicated in ethanol-induced biochemical and behavioral changes. Ethanol exposure causes changes to PKCε expression and localization in various brain regions that mediate addiction-favoring plasticity. Ethanol works in conjunction with numerous upstream kinases and second messenger activators to affect cellular PKCε expression. Chauffeur proteins, such as receptors for activated C kinase (RACKs, cause the translocation of PKCε to aberrant sites and mediate ethanol-induced changes. In this article, we aim to review the following: the general structure and function of PKCε, ethanol-induced changes in PKCε expression, the regulation of ethanol-induced PKCε activities in DAG-dependent and DAG-independent environments, the mechanisms underlying PKCε-RACKε translocation in the presence of ethanol, and the existing literature on the role of PKCε in ethanol-induced neurobehavioral changes, with the goal of creating a working model upon which further research can build.

  16. What's "quickest and easiest?": parental decision making about school trip mode

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    Faulkner Guy EJ

    2010-08-01

    Full Text Available Abstract Background The potential benefits of active school travel (AST are widely recognized, yet there is consistent evidence of a systematic decline in the use of active modes of transportation to school since the middle part of the 20th century. This study explored parental accounts of the school travel mode choice decision-making process. Methods Thirty-seven parents of children (17 who walked; 20 who were driven from four elementary schools in Toronto, Canada participated in semi-structured interviews. The schools varied with respect to walkability of the built environment and socio-economic status. Thematic analysis of interview transcripts identified a two-stage decision-making process. Results An initial decision concerned the issue of escorting or chauffeuring a child to/from school. This decision appeared to be primarily influenced by concerns about traffic, the child's personal safety, and the child's maturity and cognitive ability regarding navigating his/her way to/from school safely. Following the escort decision, parents considered mode choice, typically selecting what they perceived to be the easiest and most convenient way to travel. The ascription of convenience to the various modes of transportation was influenced by perceptions of travel time and/or distance to/from school. Convenience became a particularly salient theme for parents who found it necessary to complete multi-activity trip chains. Conclusions The school travel mode choice decision process is complex. Future research and practice should continue to address safety concerns that are typically the focus of active school transport initiatives while addressing more explicitly the behavioural cost of competing mode choices.

  17. Long time contamination from plutonium

    Energy Technology Data Exchange (ETDEWEB)

    Fueloep, M; Patzeltova, N; Ragan, P [Inst. of Preventive and Clinical Medicine, Bratislava (Slovakia); Matel, L [Comenius Univ., Bratislava (Slovakia). Department of Nuclear Chemistry

    1996-12-31

    Plutonium isotopes in the organism of the patient (who had participated in the liquidation works after the Chernobyl accident; for three month he had stayed in the epicenter, where he acted as a chauffeur driving a radioactive material to the place of destination) from urine were determined. For determination of the concentration of Pu-239, Pu-240 in urine a modified radiochemical method was used. After mineralization the sample was separated as an anion-nitrate complex with contact by the anion form of the resin in the column. The resin was washed by 8 M HNO{sub 3}, the 8 M HCl with 0.3 M HNO{sub 3} for removing the other radionuclides. The solution 0.36 M HCl with 0.01 M HF was used for the elution of plutonium. Using the lanthanum fluoride technique the sample was filtrated through a membrane filter. The plutonium was detected in the dry sample. The Pu-239 tracer was used for the evaluation of the plutonium separation efficiency. The alpha spectrometric measurements were carried out with a large area silicon detector. The samples were measured and evaluated in the energy region 4.98-5.18 MeV. The detection limit of alpha spectrometry measurements has been 0.01 Bq dm{sup -3}. The concentration of plutonium in the 24-hour urine was determined three times in the quarter year intervals. The results are: 54 mBq, 63.2 mBq, 53 mBq, with average 56,7 mBq. From the results of the analyses of plutonium depositions calculated according to ICRP 54 the intake of this radionuclide for the patient was 56.7 kBq. To estimate a committed effective dose (50 years) from the intake of plutonium was used a conversion factor 6.8.10{sup -5} Sv.Bq{sup -1} (class W). So the expressed committed effective dose received from the plutonium intake is 3.8 Sv. This number is relatively high and all the effective dose will be higher, because the patient was exposed to the other radionuclides too. (Abstract Truncated)

  18. Contributions to Pursuit-Evasion Game Theory

    Science.gov (United States)

    Oyler, Dave Wilson

    This dissertation studies adversarial conflicts among a group of agents moving in the plane, possibly among obstacles, where some agents are pursuers and others are evaders. The goal of the pursuers is to capture the evaders, where capture requires a pursuer to be either co-located with an evader, or in close proximity. The goal of the evaders is to avoid capture. These scenarios, where different groups compete to accomplish conflicting goals, are referred to as pursuit-evasion games, and the agents are called players. Games featuring one pursuer and one evader are analyzed using dominance, where a point in the plane is said to be dominated by a player if that player is able to reach the point before the opposing players, regardless of the opposing players' actions. Two generalizations of the Apollonius circle are provided. One solves games with environments containing obstacles, and the other provides an alternative solution method for the Homicidal Chauffeur game. Optimal pursuit and evasion strategies based on dominance are provided. One benefit of dominance analysis is that it extends to games with many players. Two foundational games are studied; one features multiple pursuers against a single evader, and the other features a single pursuer against multiple evaders. Both are solved using dominance through a reduction to single pursuer, single evader games. Another game featuring competing teams of pursuers is introduced, where an evader cooperates with friendly pursuers to rendezvous before being captured by adversaries. Next, the assumption of complete and perfect information is relaxed, and uncertainties in player speeds, player positions, obstacle locations, and cost functions are studied. The sensitivity of the dominance boundary to perturbations in parameters is provided, and probabilistic dominance is introduced. The effect of information is studied by comparing solutions of games with perfect information to games with uncertainty. Finally, a pursuit law

  19. Long time contamination from plutonium

    International Nuclear Information System (INIS)

    Fueloep, M.; Patzeltova, N.; Ragan, P.; Matel, L.

    1995-01-01

    Plutonium isotopes in the organism of the patient (who had participated in the liquidation works after the Chernobyl accident; for three month he had stayed in the epicenter, where he acted as a chauffeur driving a radioactive material to the place of destination) from urine were determined. For determination of the concentration of Pu-239, Pu-240 in urine a modified radiochemical method was used. After mineralization the sample was separated as an anion-nitrate complex with contact by the anion form of the resin in the column. The resin was washed by 8 M HNO 3 , the 8 M HCl with 0.3 M HNO 3 for removing the other radionuclides. The solution 0.36 M HCl with 0.01 M HF was used for the elution of plutonium. Using the lanthanum fluoride technique the sample was filtrated through a membrane filter. The plutonium was detected in the dry sample. The Pu-239 tracer was used for the evaluation of the plutonium separation efficiency. The alpha spectrometric measurements were carried out with a large area silicon detector. The samples were measured and evaluated in the energy region 4.98-5.18 MeV. The detection limit of alpha spectrometry measurements has been 0.01 Bq dm -3 . The concentration of plutonium in the 24-hour urine was determined three times in the quarter year intervals. The results are: 54 mBq, 63.2 mBq, 53 mBq, with average 56,7 mBq. From the results of the analyses of plutonium depositions calculated according to ICRP 54 the intake of this radionuclide for the patient was 56.7 kBq. To estimate a committed effective dose (50 years) from the intake of plutonium was used a conversion factor 6.8.10 -5 Sv.Bq -1 (class W). So the expressed committed effective dose received from the plutonium intake is 3.8 Sv. This number is relatively high and all the effective dose will be higher, because the patient was exposed to the other radionuclides too. For example the determination of the rate radionuclides Am-241/Pu-239,Pu-240 was 32-36 % in the fallout after the Chernobyl

  20. La grève comme drame social Strike as a social drama, an anthropological analysis of an urban transportation conflict

    Directory of Open Access Journals (Sweden)

    Ghislaine Gallenga

    2011-07-01

    Full Text Available Cet article propose une lecture ethnologique de la grève dont la Régie des Transports de Marseille (RTM a été le théâtre en 1995-96, en l’associant à la grille d’analyse du drame social selon l’acception de Victor Turner. L’analyse de la grève s’inscrit dans le cadre d’une lecture diachronique des processus de « modernisation » des entreprises de service public. La méthode ethnographique retenue pour la recherche est celle de l’immersion avec occupation d’un poste de travail - chauffeur de bus dans un dépôt d’un quartier dit sensible de Marseille lors de l’éclatement de la grève. À travers une analyse ethnographique détaillée des phases successives de ce drame social - rupture, crise, ajustement, réintégration - l’article souligne les effets de rupture que celui-ci a engendrés ainsi que la visibilité majeure de certains symboles hérités de la communitas. Ceux-ci marquent la phase de crise à l’intérieur du drame social de la grève. La grève de décembre 1995 - janvier 1996 s’est transformée en un marqueur identitaire et est devenue, à l’instar de « la Grande guerre », dans l’évocation de maints traminots, « la Grande grève ».This paper is an ethnological analysis of the long strike that occurred in 1995-96 within the Public Transportation Society of the French city of Marseilles. The analysis grid is inspired from the social drama concept of Victor Turner. The analysis of the strike is being understood as a diachronic reading of modernization processes within the public utility sector. The research was conducted through an ethnographic field work which took the form of driving regular buses in a popular neighbourhood of Marseilles as the strike broke out. Through the detailed ethnography of the successive steps of this social drama – breach, crisis, adjustment, redressive action - the paper stresses the breach phenomenon which this social drama brought along as well as the

  1. [The effects of manpower emigration on income distribution and consumption models in the Egyptian economy].

    Science.gov (United States)

    Abdel Fadil, M

    1985-01-01

    This work analyzes the effects of emigration from Egypt on the distribution of income and the consumption model of the Egyptian economy. The increasing role of remittances as a principal source of household income has disturbed the old division of income among socioeconomic groups. It is difficult to estimate the volume of remittances with any precision because of the variety of ways in which they can be made. Official statistics tend to underestimate their value by ignoring black market transactions, remittances of merchandise, and other forms. An estimate was made of the value of remittances in 1980 taking account of wage levels of 5 different types of workers in the principal employing countries, their average propensities to save, and the employment structure of migrants by socioprofessional groups. The average educational level of emigrants appears to have declined somewhat between 1972-78. Average monthly income for emigrants was estimated to range from 792 Egyptian pounds for technical and professional workers to 252 for unskilled workers and the propensity to save was estimated to range from 40% for technical and scientific workers to 15% for unskilled workers. The total income remitted in 1980 in millions of Egyptian pounds was estimated at 912 for 240,000 technical and scienfific workers, 739 for 360,000 intermediate level workers, 415 for 300,000 artisans and workers, 60 for 60,000 chauffeurs, and 109 for 240,000 unskilled workers. Although remittances have elevated the per capita income of the low income groups, their impact has been diminished by severe inflationary pressures which have led to a decline in living levels and a less complete satisfaction of basic needs. Salary levels of construction workers were 7-9 times higher in Egyptian pounds in 1977 in 3 countries of immigration than in Egypt, while they were 7-10 times higher in 4 countries for university professors. Remittances are used by families receiving them for subsistence or investment