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See detailPhysically-based groundwater vulnerability assessment for groundwater protection and land-use management
Popescu, Ileana-Cristina; Brouyère, Serge ULg; Derouane, Johan et al

Poster (2010, April 22)

Numerous groundwater vulnerability and risk mapping techniques have been developed taking into consideration a variable number of factors. Most common techniques produce maps of indexes based on a ... [more ▼]

Numerous groundwater vulnerability and risk mapping techniques have been developed taking into consideration a variable number of factors. Most common techniques produce maps of indexes based on a relatively empirical combination of weighted factors reflecting the protective effect of underground formations overlying the groundwater resource. The limitation of such methods is related to their use of a qualitative definition of groundwater vulnerability, as opposed to a definition based on a quantitative description of contaminant migration. A physically-based point of view and definition of the vulnerability is proposed and based on three factors describing a pollution event, which are the contaminant transfer time from the hazard location to the 'target', the contamination duration at the 'target' and the level of contaminant concentration reached at the 'target'. This concept allows a clear distinction between conventional aspects and physically-based results in the building of a final vulnerability indicator. This methodology has the further advantage to consider the possible impact of runoff conditions occurring at the land surface and possibly leading to lateral contamination of groundwater through downstream preferential infiltration features, such as karstic features. Practically, this method needs to describe and simulate the pollutant migration in the unsaturated zone and possibly in the saturated zone in order to assess the breakthrough curve at the 'target'. Preliminary application is illustrated on a case-study located in a Néblon limestone basin in Belgium, one of the main groundwater resources for the city of Liège in the Meuse basin. Perspectives are proposed towards a generalisation of the vulnerability concept for risk assessment within a pressure - state - impact framework. [less ▲]

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See detailPhysician Induced Demand for C-Sections: Does the Convenience Incentive Matter?
Lefevre, Mélanie ULg

Scientific conference (2014, June)

Detailed reference viewed: 14 (2 ULg)
See detailPhysician induced demand for C-sections: does the convenience incentive matter?
Lefevre, Mélanie ULg

E-print/Working paper (2014)

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of primary cesareans to ... [more ▼]

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of primary cesareans to accommodate their own preferences for control of deliveries around holiday Mondays. Using a sample of more than 1,300,000 deliveries, I can estimate that the induced demand due to convenience is close to zero. A small signi cant e ect is found for women having had a previous C-section. While I replicate previous results of lower C-section rates on leisure periods, I show that they are due to the way doctors schedule planned cesareans rather than to an induced demand for reason of physicians' convenience. If induced demand occurs, the decision takes place in the labor room and is not planned in advance. [less ▲]

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See detailPhysician Induced Demand for C-Sections: Does the Convenience Incentive Matter?
Lefevre, Mélanie ULg

E-print/Working paper (2013)

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of cesareans to accommodate ... [more ▼]

This paper investigates whether physicians induce demand for C-sections in the days preceding leisure periods. I reject that doctors are meaningfully increasing the number of cesareans to accommodate their own preferences for control of deliveries around holiday Mondays. Using a sample of more than 1,300,000 deliveries, I can precisely estimate that the induced demand due to convenience is close to zero. While I replicate previous results of lower C-section rates on leisure periods, I show that they are due to the way doctors schedule planned cesareans rather than to an induced demand for reason of physicians' convenience. [less ▲]

Detailed reference viewed: 16 (5 ULg)
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See detailPhysicians are different when they learn communication skills: influence of the locus of control
Libert, Yves; Merckaert, I.; Reynaert, C. et al

in Psycho-Oncology (2007), 16(6), 553-562

Purpose: Although it is widely recognised that educational interventions may be more effective for people with an 'internal' Locus of Control (who believe that life outcomes are controlled by their own ... [more ▼]

Purpose: Although it is widely recognised that educational interventions may be more effective for people with an 'internal' Locus of Control (who believe that life outcomes are controlled by their own characteristics or actions) compared to people with an 'external' Locus of Control (who believe that life outcomes are controlled by external forces such as luck, fate or others), no study has yet assessed the influence of physicians' Locus of Control (LOC) on communication skills learning. This study aims to test the hypothesis that, in a communication skills training program, physicians with an 'internal' LOC would demonstrate communication skills acquisition to a greater degree than those with an 'external' LOC. Methods: A non-randomised longitudinal intervention study was conducted between January 1999 and April 2001. Sixty-seven volunteer physicians from private and institutional practice in Belgium participated in a learner-centred, skills-focused, practice-oriented communication skills training program. Communication skills changes were assessed in 2 standardised simulated interviews before and after training (one two-person and one three-person interview). Communication skills were assessed using the Cancer Research Campaign Workshop Evaluation Manual. Physicians' LOC was assessed using the Rotter I-E scale. Communication skills changes of the upper and lower third of physicians in respect of their scores on this scale were compared using group by time repeated measures of variance. Results: In the two-person and three-person interviews, changes in the use of open directive questions were more important among physicians with an "internal" LOC compared with changes observed among physicians with an 'external' LOC (P = 0.066 and P = 0.004, respectively). In the three-person interview, changes in the use of directive questions, assessing functions and moderate feelings stated explicitly were more important among physicians with an 'internal' LOC compared with changes observed among physicians with an 'external' LOC (P = 0.001; P = 0.002 and P = 0.011 respectively). Conclusion: This study shows that physicians' LOC is a psychological characteristic that could influence the efficacy of a communication skills training program. This evidence supports the idea that a psychological characteristic such as 'internal' LOC may facilitate communication skills acquisition through physicians' belief that communication with patients may be controlled by physicians themselves. Copyright (c) 2006 John Wiley [less ▲]

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See detailPhysicians' communication with a cancer patient and a relative - A randomized study assessing the efficacy of consolidation workshops
Delvaux, N.; Merckaert, I.; Marchal, S. et al

in Cancer (2005), 103(11), 2397-2411

BACKGROUND. Although patients with cancer are often accompanied by a relative during medical interviews, to the authors' knowledge little is known regarding the efficacy of communication skills training ... [more ▼]

BACKGROUND. Although patients with cancer are often accompanied by a relative during medical interviews, to the authors' knowledge little is known regarding the efficacy of communication skills training programs on physicians' communication skills in this context. The objective of the current study was to assess the efficacy of 6 consolidation workshops, 3 hours in length, that were conducted after a 2.5-day basic training program. METHODS. After attending the basic training program, physicians were assigned randomly to consolidation workshops or to a waiting list. Training efficacy was assessed through simulated and actual interviews that were recorded on an audio tape at baseline, after consolidation workshops for the consolidation-workshops group, and 5 months after the end of basic training for the waiting-list group. Communication skills were assessed according to the Cancer Research Campaign Workshop Evaluation Manual. Patients' and relatives' perceptions of and satisfaction with physicians' communication performance were assessed using a 15-item questionnaire. RESULTS. Sixty-two physicians completed the training program. Compared with physicians who participated to the basic training program, when addressing the patient, physicians who were randomized to the consolidation workshops used more open, open directive, and screening questions (P = 0.011 in simulated patient interviews and P = 0.005 in actual patient interviews) and elicited and clarified psychologic concerns more often (P = 0.006 in simulated patient interviews and P < 0.001 in actual patient interviews). When they addressed the relative, physicians who were randomized to the consolidation workshops gave less premature information (P = 0.032 in simulated patient interviews and P < 0.001 in actual patient interviews). When they addressed the patient and the relative simultaneously, physicians who were randomized to the consolidation workshops used more empathy, educated guesses, alerting to reality, confronting, negotiating, and summarizing (P = 0.003 in simulated patient interviews and P = 0.024 in actual patient interviews). Patients, but not relatives, who interacted with physicians in the consolidation-workshops group were more satisfied globally with the interviews (P = 0.022). CONCLUSIONS. Six 3-hour consolidation workshops resulted in improved communication skills addressed to patients and to relatives. The current results showed that the transfer of skills addressing relatives' concerns remained limited and that consolidation workshops should focus even more systematically on the practice of three-person interviews. (c) 2005 American Cancer Society. [less ▲]

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See detailPhysicians' patient-centeredness. An empirical evidence of the benefits of a communication skills training program.
Jonius, Bénédicte ULg

Diverse speeche and writing (2010)

Purpose. In oncology today, patient-centeredness is an important goal. The purpose of this study was to assess the impact of a basic communication skills training program (assessment skills included open ... [more ▼]

Purpose. In oncology today, patient-centeredness is an important goal. The purpose of this study was to assess the impact of a basic communication skills training program (assessment skills included open questions, open directive questions and assessment questions and supportive skills included acknowledgment, empathy, negotiation and synthesis) on the association between physicians¿ use of assessment and supportive skills and patients¿ characteristics, that is, to test patient-centeredness. Methods. Communication skills included assessment and supportive skills and were assessed during a consultation before and after a basic communication skills training program. Consultations were audio-recorded and transcribed. Assessment and supportive skills were rated according to the Cancer Research Campaign Workshop Evaluation Manual. Patients¿ characteristics were categorized as sociodemographic, socioprofessional, physical and psychological and were measured before and after the Basic Training Program. Results. Sixty-three physicians were included. Before the Basic Training Program, physicians¿ supportive skills were associated with two patient sociodemographic characteristics: age and marital status. After the Basic Training Program, physicians¿ assessment skills were associated with two patient psychological characteristics: global state of Quality of Life and global goal of Quality of Life. Discussion. This study showed that physicians¿ patient-centeredness can be improved with a Basic Training Program. Surprisingly, after the Basic Training Program, physicians focused more on patients' psychological characteristics and specifically on Quality of Life. There is a transfer of assessment skills to the clinical practice. This could approve adherence to medication and satisfaction. [less ▲]

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See detailPhysico-chemical and membrane-interacting properties of D-xylose-based bolaforms. Influence of the anomeric configuration
Nasir, Mehmet Nail ULg; Legrand, Vincent; Gatard, Sylvain et al

in MATEC Web of Conferences (2013), 4

Sugar-based biosurfactants such as xylose-derived bolaforms have interesting properties, for example high biocompatibility and biodegradability which make them potential useful molecules in the ... [more ▼]

Sugar-based biosurfactants such as xylose-derived bolaforms have interesting properties, for example high biocompatibility and biodegradability which make them potential useful molecules in the pharmaceutical and cosmetic fields. Until now, no detailed analyses of the physico-chemical properties of these compounds have been undertaken. Two symmetrical D-xylose-based bolaforms were chemically synthesized where the two xylose heads are linked via an acetal link to a hydrocarbon chain containing 18 carbon atoms and an unsaturation. The two bolaforms differ only by their anomeric configuration: or The bolaform exhibits interfacial properties at the air-water interface which is not the case for the . FTIR spectroscopy showed that the interactions between the bolaform and POPC, a model phospholipid, involve the carbonyl groups of the phospholipid [less ▲]

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See detailPhysico-chemical and morphological properties of current particulated biomaterials used in alveolar bone augmentations: a review.
LAMBERT, France ULg; Layrolle, Pierre; ROMPEN, Eric ULg et al

in Journal of Osteology and Biomaterials (2011), 2

The efficacy of grafting materials for alveolar bone regeneration procedures has been repeatedly corroborated by clinical and scientific evidence. Although an ever growing number of biomaterials are ... [more ▼]

The efficacy of grafting materials for alveolar bone regeneration procedures has been repeatedly corroborated by clinical and scientific evidence. Although an ever growing number of biomaterials are available on the market, the origins, material characteristics, bioactivity and osteoconductive properties of these products are not always known by clinicians, hence often hampering an adequate product selection. The purpose of this contribution was to provide an overview of five different types of osteoconductive grafting materials frequently used in dentistry (Bio-Oss®, Cerasorb M™, Bone Ceramic®, Natix®, Genos®) and to summarize their physico-chemical and morphological characteristics at the macro- and micro-scale. Furthermore, the influence of these properties on the in vivo behaviour of these biomaterials is discussed. The results of this study are presented as data sheets, which may prove helpful for clinicians in the design of their treatment strategies. [less ▲]

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See detailPhysico-chemical characterization of new polyhydroxyburates (PHB).
Ottevaere, M; Lespineux, David; Sevrin, Chantal ULg et al

Poster (2009, April 01)

Detailed reference viewed: 11 (0 ULg)
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See detailPhysico-chemical mechanisms affecting the adherence of starch granules on materials with different hydrophobicities
Detry, Jean; Sindic, Marianne ULg; Servais, Marjorie et al

in Journal of Colloid & Interface Science (2011), 355

Detailed reference viewed: 12 (6 ULg)
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See detailPhysico-chemical properties and aroma profile of Acacia Honey produced in Romania
Madas, Mariana-Niculina ULg; Francis, Frédéric ULg; Marghitas, L.A. et al

in Communications in Agricultural and Applied Biological Sciences (2014, February 07), 79(1), 133-135

Detailed reference viewed: 39 (1 ULg)
See detailPhysico-chemical properties and CO2 fluxes at a frost flowers station (SIMBA Experiment - Bellingshaussen Sea, Antarctica)
Tison, Jean Louis; Brabant, Frederic; Geilfus, Nicolas-Xavier ULg et al

Poster (2009, March)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailPhysico-chemical properties and photocatalytic activity of calcined P-doped and P/Ag-doped TiO2 xerogels
Bodson, Céline; Pirard, Sophie ULg; Pirard, René ULg et al

Conference (2013, March 05)

Detailed reference viewed: 31 (1 ULg)