| 321. |
- Caldera, Trinidad, et al.
(författare)
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Is treatment in groups a useful alternative for psychiatry in low-income countries? An evaluation of a psychiatric outpatient unit in Nicaragua.
- 1995
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Ingår i: Acta Psychiatrica Scandinavica. - 0001-690X .- 1600-0447. ; 92:5, s. 386-91
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Tidskriftsartikel (refereegranskat)abstract
- Centro de Atención Psicosocial in León, Nicaragua is a psychiatric outpatient unit that has developed a group-oriented model of working, in which 80% of all visits are in groups: first-admission groups, insight-oriented group psychotherapy, psycho-educative, family groups and relatives groups. The aim of the present study was to analyze patient characteristics and make a preliminary study of improvement, compliance and patient satisfaction in a 1-year perspective. One hundred consecutive visits were assessed, 44 of them first admissions. They were assessed according to all axes of DSM-III-R plus the Structural Clinical Interview for DSM-III Disorders. A 1-year follow up was conducted on 39 of 41 selected patients within the major diagnostic groups. One of 4 patients had a psychotic disorder where schizophrenia dominated. Among nonpsychotics major depression, anxiety and adjustment disorders were most frequent. Personality disorders were common (80%) among nonpsychotic patients, paranoid, obsessive-compulsive, passive-aggressive and masochistic personality disorders dominating. The illiteracy rate was 10%, but 50% had high school or university background. Severity of mental disorders and functional level did not differ between educational levels. There was a strong male dominance in all diagnostic, socioeconomic and educational level strata and few old patients. Improvement in functional level was clinically and statistically significant in all groups, and more than two thirds were very satisfied with the group treatment offered.
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| 322. |
- Cuadra, Steven, et al.
(författare)
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Persistent organochlorine pollutants in children working at a waste-disposal site and in young females with high fish consumption in Managua, Nicaragua
- 2006
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Ingår i: Ambio. - 0044-7447 .- 1654-7209. ; 35:3, s. 109-116
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to assess persistent organochlorine pollutant (POP) levels in serum collected from children (11-15 years old) working and sometimes also living at the municipal waste-disposal site in Managua, located at the shore of Lake Managua, and in nonworking children living both nearby and also far away from the waste-disposal site. The influence of fish consumption was further evaluated by assessing POPS levels in serum from young women (15-24 years old) with markedly different patterns of fish consumption from Lake Managua. 2,2-bis(4-chlorophenyl)-1,1,1-trichloro-ethane (4,4’-DDT) and 2,2-bis(4-chlorophenyl)-1,1-dichloro-ethene (4,4-DDE), T-hexachlorocyclohexane (gamma-HCH), polychlorinated biphenyls, pentachlorophenol, and polychlorobiphenylols were quantified in all samples. In general, the levels observed were higher than those reported in children from developed countries, such as Germany and United States. Toxaphene, aldrin, dieldrin, and beta-HCH could not be identified in any sample. The children working at the waste-disposal site had higher levels of POPS compared with the nonworking reference groups. In children not working, there were also gradients for several POPs, according to vicinity to the waste-disposal site. Moreover, in children, as well as in young women, there were gradients according to fish consumption. The most abundant component was 4,4-DDE, but at levels still lower than those reported in children from malarious areas with a history of recent or current application of 4,4-DDT for vector control.
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| 323. |
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| 324. |
- Somarriba, O., et al.
(författare)
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Robust STDMA scheduling in Multi-hop Wireless Networks for single-node position perturbations
- 2009
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Ingår i: 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009. ; , s. 566-571
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Konferensbidrag (refereegranskat)abstract
- A major design issue in Multi-hop Wireless Networks is the Medium Access Control (MAC) protocols that determine how nodes share the channel to transmit their packets. One type of MAC protocol with efficient spatial reuse characteristics are the Spatial TDMA (STDMA) protocols. STDMA protocols are a class of conflict-free MAC protocols that enable high spectral utilization by scheduling transmissions on the channel. Its main features are high throughput and the possibility of providing delay guarantees. We studied the sensibility of STDMA networks to disruption caused by slow mobility of one "critical" node (single-user perturbation), that causes problems to the schedule maintenance. We assessed a framework that produces robust STDMA scheduling against these topological changes. To do that, we introduced and analyzed heuristic algorithms that mainly exploit capabilities of the physical layer such as power and rate control, and rerouting. We considered the limited-mobility management in STDMA networks to find the ranges where our heuristics will avoid re-scheduling of the whole STDMA frame. We found that a substantial throughput degradation due to slow mobility in STDMA networks can be compensated by means of power or rate control, and rerouting. Our results showed that rate-controlled (RC) STDMA is the most promising scheme to maintain communication under slow mobility.
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| 325. |
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| 326. |
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| 327. |
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| 328. |
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| 329. |
- Benavente, Martha, et al.
(författare)
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Biosorption of Heavy Metals on Chitosan
- 2007
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Ingår i: Hydro Copper 2007. - Santiago, Chile : GECAMIN Ltda.. - 9789568504076 ; , s. 283-290
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Konferensbidrag (refereegranskat)
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| 330. |
- Mendieta, Rolando, et al.
(författare)
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Determination of Suitable Thin-Layer Drying Models for Brewer's Yeast (Saccharomyces cerevisiae)
- 2016
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Ingår i: Nexo. - Managua, Nicaragua : UNIV NACL INGENIERIA. - 1818-6742 .- 1995-9516. ; 2, s. 58-66
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Tidskriftsartikel (refereegranskat)abstract
- Mathematical models of thin-layer drying for brewer’s yeast (Saccharomyces cerevisiae) were studied and verified with experimental data. Twelve (12) different mathematical drying models were compared according to three (3) statistical parameters, i.e., correlation coefficient, root mean square error and chi (χ²)-square. The thin-layer drying kinetics of brewer’s yeast was experimentally investigated in a laboratory tunnel dryer and the mathematical modelling, using thin-layer dryingmodels present in the literature, was performed. Experiments were performed at air temperature of 40, 50 and 60 ºC at an airflow rate of 1.2 m/s. Drying curves obtained from the experimental data were fitted to the thin-layer drying models. The results show that the Page model is the most appropriate model for predicting the drying behaviour of the thin-layer brewer’s yeast.
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