57 research outputs found

    Stability of collapsible tube with thickness tapering

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    Evaluating Occupational Accidents and Their Indices In a Refining and Distributing Company of Petroleum Products of Mahshahr 2008-2010

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    Technological progress and oil industry development accompanies have a high rate of risk. This study was conducted with the aim of evaluating occupational accidents and related indicators for decreasing the number of damages by offering control measures. In this descriptive-analytical study, essential information was extracted from the records and agendas of the technical safety committee and the evaluation of accident frequency was done based on the accident type, the time and the location of its occurrence, environmental condition, root factors, and demographic variables of the injured. The relationship between repetition, severity, frequency of the accidents and marital status of the company’s personnel was also studied. Accident analysis was done by Chi square test . The occurrence of about 102 accidents was reported in an incident evaluation, which was done between the years 2008 and 2010. The average age of the injured was 29.1± 8.61. Accidents and clashes were 31.4% of the accidents and falling from height 21.6% of them. Many of the accidents occurred in plumbing activities (24.5%), tank construction (23.5%), and civil operations (15.7%). 47% of the accidents happened in 2009, 43% in 2010, and 10% in 2008. Occurrence rate of accidents was 48.1 and their intensity rate equaled 0.15 for one million working hours. The relationship of accident type and marital status was a meaningful relationship based on Chi-square test (P = 0.014); this test showed the relationship of accident type and its reasons a significant one as well. (P = 0.035) Considering the calculated coefficients and evaluated factors in this study, safety training, constant inquiring of sub-activities, inserting safety and HSE provisions and guidelines to the contractors’ contracts and monitoring their application would be effective in decreasing the number accidents.

    Evaluation of Rice Plant Response to Nitrogen, Phosphours and Potassium Based on Site-Specific Nutrient Management (SSNM)

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    Site specific nutrient management technique can increase nutrients use efficiency, prevent non-selective use of fertilizers and provide better performance of fertilizers. Optimizing fertilizer application was used in this study by site specific nutrient management technique through indigenous soil nutrient supply, crop nutrient demand (expected yield) and nutrients recovery. Twenty two selected farms were located in west Guilan and varied widly in soil properties, and agricultural practice management. In each research area were divided into four plots (each plot had 12 square meters). The fertilizers treatments determined through Doberman method (N0, P0, K0, and NPK). Morphological characters, yield and yield components and nitrogen, phosphorus and potassium in soil and plants after harvest were meseared. Also provided indigenous nutrition elements to consider the yield were calculated. The results showed in 6 farms (27%), applied nitrogen were more and in 14 farms (63%) were less than the recommended dose. Furthermore only 2 farms were in recommended range. Phosphorus supply in all fields was more than the recommended dose. This increased consumption ranged from 52 to 85 kg.ha-1 P2O5. Also according to site specific nutrient management, 10 farms had more potassium intake equivalent to 95 to 129 kg.ha-1 than the recommended dose and in 12 farms the recommended dose was high and must consume less potassium to achieve optimal yield.The results indicate that current fertilizer recommendations based on testing in a region can not be justified for other areas

    Transpiração e crescimento foliar de crisântemo em função da fração de água transpirável no substrato

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    The objective of this work was to evaluate the response of transpiration and leaf growth of chrysanthemum (Dendranthema grandiflorum) cultivars to available water in the substrate, represented by the fraction of transpirable substrate water (FTbSW). The experiments were performed in two periods, in a completely randomized design, with four chrysanthemum cultivars (Cherie White, Bronze Repin, Yoapple Valley, and Calabria), under two substrate water conditions (with or without water stress), with 10 replicates. Plants were grown in a greenhouse, in 2.8-L pots with substrate. FTSbW, transpiration, and leaf growth were measured daily, during the period of water deficit. The average threshold FTSbW, indicating that transpiration and leaf growth began to be affected, was respectively 0.63 and 0.68 for 'Cherie White', 0.60 and 0.69 for 'Bronze Repin', 0.53 and 0.59 for 'Yoapple Valley', and 0.51 and 0.54 for 'Calabria'. Available water decrease in the substrate reduces leaf growth before restricting transpiration. The Cherie White and Bronze Repin cultivars are more tolerant to water deficit by closing the stomata earlier and retaining more water in the substrate than the Yoapple Valley and Calabria cultivars.O objetivo deste trabalho foi avaliar a resposta da transpiração e do crescimento foliar de cultivares de crisântemo (Dendranthema grandiflorum) ao conteúdo de água disponível no substrato, representado pela fração de água transpirável no substrato (FATSb). Os experimentos foram realizados em dois períodos, em delineamento inteiramente casualizado, com quatro cultivares de crisântemo (Cherie White, Bronze Repin, Yoapple Valley e Calabria), em duas condições hídricas (com ou sem deficiência hídrica), com 10 repetições. As plantas foram cultivadas em casa de vegetação, em vasos de 2,8 L preenchidos com substrato. A FATSb, a transpiração e o crescimento foliar foram determinados diariamente durante o período de deficiência hídrica. As FATSb críticas médias, indicativas de que a transpiração e o crescimento foliar começam a ser afetados, foram respectivamente de 0,63 e 0,68 para 'Cherie White', 0,60 e 0,69 para 'Bronze Repin', 0,53 e 0,59 para 'Yoapple Valley', e 0,51 e 0,54 para 'Calabria'. A diminuição da água disponível no substrato provoca a redução do crescimento foliar antes de restringir a transpiração. As cultivares Cherie White e Bronze Repin são mais tolerantes ao deficit hídrico por fechar os estômatos antes e conservar mais a água no substrato do que as cultivares Yoapple Valley e Calabria

    Transpiration and leaf growth of potato clones in response to soil water deficit

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    Potato (Solanum tuberosum ssp. Tuberosum) crop is particularly susceptible to water deficit because of its small and shallow root system. The fraction of transpirable soil water (FTSW) approach has been widely used in the evaluation of plant responses to water deficit in different crops. The FTSW 34 threshold (when stomatal closure starts) is a trait of particular interest because it is an indicator of tolerance to water deficit. The FTSW threshold for decline in transpiration and leaf growth was evaluated in a drying soil to identify potato clones tolerant to water deficit. Two greenhouse experiments were carried out in pots, with three advanced clones and the cultivar Asterix. The FTSW, transpiration and leaf growth were measured on a daily basis, during the period of soil drying. FTSW was an efficient method to separate potato clones with regard to their response to water deficit. The advancedclones SMINIA 02106-11 and SMINIA 00017-6 are more tolerant to soil water deficit than the cultivar Asterix, and the clone SMINIA 793101-3 is more tolerant only under high solar radiation

    Sjuksköterskors upplevelser av etiska problem i vården av patienter i livets slutskede : En litteraturöversikt

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    Background: In the background section the following terms are described: Palliative care and holistic view, care at the end-of-life, ethical problems in the end-of-life care and ethical problem and ethical dilemma. Aim: The purpose of this literature review was to describe nurses’ experiences of ethical problems in the end-of-life care of patients. Method: A literature review was selected as a method in this study based on eightscientific articles. Articles were reviewed and analyzed critically by the author. Travelbees’ theory (1971) “human- to- human relationships” was selected as a theoretical basis. Results: The result presents six themes as follows: Decision-making, ineffective treatments and therapies, insufficient communication, the lack of cooperation, inadequate respect for patient’s autonomy and uncertainty in caring role. These themes present how nurses deal with end-of-life care and in which situations ethical problems arise. Discussions: The result was discussed in relation to Travelbees’ theory (1971) “human-to-human relationships”. Nurses’ different experiences according to their different responsibilities such as insufficient communication and cooperation, decision-making processes, uncertainty in caring role and inadequate respect for patients’ autonomy were discussed.Bakgrund: I bakgrunden beskrivs följande termer: Palliativ vård och holistiskt synsätt, vård vid livets slutskede, etiska problem i livets slutskede och definitionerna av etiskt problem och etiskt dilemma. Syfte: Syftet med denna litteraturöversikt var att beskriva sjuksköterskors upplevelser av etiska problem i vården av patienter i livets slutskede. Metod: En litteraturöversikt valdes som metod i denna studie som bygger på åtta vetenskapliga artiklar. Artiklarna granskades och analyserades av författaren. Travelbees teori (1971) “human-to-human relationships” valdes som en teoretisk grund. Resultat: Resultatet presenterar sex teman enligt följande: Beslutsfattande, ineffektiva behandlingar och terapier, otillräcklig kommunikation, bristande samarbete, otillräcklig respekt för patientens autonomi och osäkerhet i vårdande roll. Dessa teman presenterar hur sjuksköterskor hanterar vård vid livets slutskede och i vilka situationer etiska problem uppstår. Diskussion: Resultatet diskuterades utifrånTravelbees’ theory (1971) “human- to- human relationships”. Sjuksköterskors olika erfarenheter i enlighet med deras olika ansvarsområden såsom otillräcklig kommunikation och samarbete, beslutsprocesser, osäkerheten i vårdanderoll och bristande respekt för patientens autonomi diskuterades
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