Metacercarial utilization of a naturally infected single species (Lymnaea peregra) snail community by Echinoparyphium recurvatum

2004 ◽  
Vol 78 (1) ◽  
pp. 51-56 ◽  
Author(s):  
N.J. Morley ◽  
J.W. Lewis ◽  
M.E. Adam
Keyword(s):  
Single Species ◽  
Host Size ◽  
Related Factors ◽  
Peripheral Organs ◽  
The Mean ◽  
Lymnaea Peregra ◽  
South East England

AbstractUtilization of a single-species molluscan community of Lymnaea peregra by metacercariae of Echinoparyphium recurvatum over a summer (July–September) period in south-east England showed an increase in the mean number of cysts per host with host size and time of exposure. Aggregation resulting from host and habitat-related factors increased with host size and time of exposure. Encystment within the host was restricted to the peripheral organs in smaller juvenile snails but as snails increased in size, metacercariae were distributed throughout the tissues.

scholarly journals Quality of life and its related factors in women with substance use disorders referring to substance abuse treatment centers

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Majid Barati ◽  
Khadijeh Bandehelahi ◽  
Tahereh Nopasandasil ◽  
Hanieh Jormand ◽  
Amir Keshavarzi
Keyword(s):  
Quality Of Life ◽  
Substance Abuse ◽  
Substance Use ◽  
Substance Abuse Treatment ◽  
Substance Use Disorders ◽  
Related Factors ◽  
Substance Abuse Treatment Centers ◽  
The Mean ◽  
Abuse Treatment

Abstract Background Substance-Related Disorders are among the most common social problems caused by using legal and illegal substances. Therefore, this study aimed at determining the quality of life (QoL) and its related factors among women with substance use disorders referring to substance abuse treatment centers in Hamadan, west of Iran. Methods This cross-sectional study was carried out on 120 Iranian female substance users recruited through the census sampling method in 2018. Data collection tools consisted of demographic characteristics and QoL assessment (SF-36). Data were analyzed using SPSS-16 via one-way analysis of variance (ANOVA) and chi-square tests. Results The mean age of the participants was 33.2 ± 12.1 years and the mean score of their total QoL was 35.35 ± 13.5. The results of multiple linear regression analysis indicated that using methamphetamine (β =  − 6.62) was the predictor of QoL in women. Moreover, there was a significant association between QoL and age (p < 0.001), educational level (p = 0.011), and age at first use (p < 0.001). Conclusion According to the results, the participants’ QoL was found to be at an unsatisfactory level. So, it is essential to implement educational help-seeking behavior for treatment and effectiveness educational, as well as holding mental health intervention, school-based substance abuse prevention, and harm reduction programs of substance use. This is especially important in adolescents, young, low-educated, early drug use, and methamphetamine user women, as it may increase the QoL

scholarly journals Understanding the Drivers of Mobility during the COVID-19 Pandemic in Florida, USA Using a Machine Learning Approach

2021 ◽  
Vol 10 (7) ◽  
pp. 440
Author(s):  
Guimin Zhu ◽  
Kathleen Stewart ◽  
Deb Niemeier ◽  
Junchuan Fan
Keyword(s):  
Race And Ethnicity ◽  
Learning Approach ◽  
Mobility Patterns ◽  
Random Forest Regression ◽  
Related Factors ◽  
Machine Learning Approach ◽  
The Mean ◽  
Case Data ◽  
Staying At Home ◽  
Very High

As of March 2021, the State of Florida, U.S.A. had accounted for approximately 6.67% of total COVID-19 (SARS-CoV-2 coronavirus disease) cases in the U.S. The main objective of this research is to analyze mobility patterns during a three month period in summer 2020, when COVID-19 case numbers were very high for three Florida counties, Miami-Dade, Broward, and Palm Beach counties. To investigate patterns, as well as drivers, related to changes in mobility across the tri-county region, a random forest regression model was built using sociodemographic, travel, and built environment factors, as well as COVID-19 positive case data. Mobility patterns declined in each county when new COVID-19 infections began to rise, beginning in mid-June 2020. While the mean number of bar and restaurant visits was lower overall due to closures, analysis showed that these visits remained a top factor that impacted mobility for all three counties, even with a rise in cases. Our modeling results suggest that there were mobility pattern differences between counties with respect to factors relating, for example, to race and ethnicity (different population groups factored differently in each county), as well as social distancing or travel-related factors (e.g., staying at home behaviors) over the two time periods prior to and after the spike of COVID-19 cases.

scholarly journals Survival analysis of a stochastic delay single-species system in polluted environment with psychological effect and pulse toxicant input

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Xiangjun Dai ◽  
Suli Wang ◽  
Weizhi Xiong ◽  
Ni Li
Keyword(s):  
Sufficient Conditions ◽  
Single Species ◽  
Threshold Value ◽  
Psychological Effect ◽  
Polluted Environment ◽  
Population System ◽  
Stochastic Delay ◽  
Species Population ◽  
The Mean ◽  
Single Species Population

Abstract We propose and study a stochastic delay single-species population system in polluted environment with psychological effect and pulse toxicant input. We establish sufficient conditions for the extinction, nonpersistence in the mean, weak persistence, and strong persistence of the single-species population and obtain the threshold value between extinction and weak persistence. Finally, we confirm the efficiency of the main results by numerical simulations.

Diet mixing in an aquatic carnivore, the harbour seal

2005 ◽  
Vol 83 (6) ◽  
pp. 851-859 ◽  
Author(s):  
Stephen J Trumble ◽  
Michael A Castellini
Keyword(s):  
Dry Matter ◽  
Single Species ◽  
Pacific Herring ◽  
Mixed Diet ◽  
Feeding Frequency ◽  
Digestible Energy ◽  
Diet Mixing ◽  
Walleye Pollock Theragra Chalcogramma ◽  
Harbour Seals ◽  
The Mean

To determine the effects of diet mixing on digestive performance, harbour seals (Phoca vitulina L., 1758) were offered either pure diets of Pacific herring (Clupea pallasii Valenciennes, 1847) or walleye pollock (Theragra chalcogramma (Pallas, 1814)) or a 1:1 mix of herring and pollock. Regardless of diet, retention time decreased approximately 40% as intake quadrupled. The mean apparent digestible dry matter (ADDM) was greatest on mixed diets during low feeding frequency trials; ADDM during high feeding frequency trials was significantly reduced as intake increased for animals on the single-species (pollock or herring) diets. As intake increased, up to 45% more digestible energy was assimilated from the mixed diet than from either single-species diet. The findings of this study suggest that a mixed diet consisting of prey differing in lipid and protein amounts increased digestible energy intake in harbour seals. Our measures of intake and ADDM in harbour seals revealed digestive flexibility and indicated that digestion in harbour seals was more efficient on a mixed diet.

Professional trilemma of students with family business experience

Kybernetes ◽  
2016 ◽  
Vol 45 (3) ◽  
pp. 446-460 ◽  
Author(s):  
Jaka Vadnjal ◽  
Predrag Ljubotina
Keyword(s):  
Family Business ◽  
Design Methodology ◽  
Future Research ◽  
Related Factors ◽  
Senior Student ◽  
Content Type ◽  
East European ◽  
Educational Backgrounds ◽  
The Mean

Purpose – Family businesses represent the largest share of small-sized firms in majority of economies around the world. Having in mind the global economic situation this trend is expected to be continued. With the goal of better understanding of the process of transferring the business to the next generation, which ensures a long-term success, the purpose of this paper is to investigate expectations of student’s with family business background. Design/methodology/approach – The research addresses the issue of an individual’s perception of entrepreneurship and the related factors that influence individual’s decision on whether to build a career as an employee, become a successor of family business or start own business as an independent entrepreneur. The authors separately analyzed West European (data from another study), East European and Slovenian senior student population for the purpose of comparative study. Students were surveyed and binominal regression was used for statistics. Findings – The results show differences between investigated populations and positions Slovenian students in the mean. The authors anticipate that differences are caused by historical, cultural and educational backgrounds. This challenging area is raising a lot of sub-questions for possible future research. Originality/value – The value of the study is in the replication of the existing methodology from the benchmarking study and result comparison.

scholarly journals Evaluation of Decayed, Missing and Filled Teeth (DMFT) index in the 12 Years Old Students of Tehran City, Iran

2018 ◽  
Vol 17 ◽  
pp. e18888
Author(s):  
Azam Goodarzi ◽  
Alireza Heidarnia ◽  
Sedigheh Sadat Tavafian ◽  
Mohammad Eslami
Keyword(s):  
Regression Analysis ◽  
Dental Caries ◽  
Multivariate Regression ◽  
Family Income ◽  
Multivariate Regression Analysis ◽  
Analysis Model ◽  
Cross Sectional Survey ◽  
Related Factors ◽  
Dmft Index ◽  
The Mean

Aim: The main aim of this study was to Evaluate of Decayed, Missing and Filled Teeth (DMFT) Index in 12 Year Old Students of Tehran City, and to identify related factors that affect dental caries within this group. Methods: A cross-sectional survey was conducted among students of 12 years old in Tehran, Iran. Dental caries status was assessed in terms of decayed teeth (DT), filled teeth (FT) and decayed, missing and filled teeth (DMFT). “Data were analysed using SPSS version 22; a multivariate regression analysis was used to determine statistically significant associations between DMFT and other variables (p < 0.05). Results: A total of 416 respondents participated in the study. The mean age of the students was10.94 (SD=0.628) years, and the mean DMFT was 1.03 (SD=1.41). So that, in this study DT (0.53 ± 0.95) had the highest and MT (0.14 ± 0.47) had the lowest mean. A multivariate regression analysis model results showed a significant relation between high DMFT scores and such variables as increasing age, lower levels of mother's education, higher family income, lower frequency of tooth brushing and dental flossing, having a history of no visits to the dentist (P<0.05). Conclusion: The current study shows that Iranian female students have a poor oral health behavior, as very few subjects use dental floss on a regular basis. Although there appeared to be a significant relationship between caries scores and demographic factors such as age and socio-behavioral variables include  family income, the level of mothers' education, the frequency of dental brushing and flossing, and both the frequency and type of visit to a dentist.

scholarly journals Investigation of work ability index (WAI) and its relationship with maximal aerobic capacity (VO2max) among cement industry employer

2020 ◽  
Author(s):  
M Kavousian ◽  
A Salehi sashlabadi ◽  
MJ Jafari ◽  
S Khodakarim ◽  
H Rabiei
Keyword(s):  
Sleep Quality ◽  
Aerobic Capacity ◽  
Work Experience ◽  
Cement Industry ◽  
Maximal Aerobic Capacity ◽  
Work Ability Index ◽  
Sports Activity ◽  
Related Factors ◽  
Cross Sectional ◽  
The Mean

Introduction: Given the importance of adapting workers' physical and mental capabilities to their job needs, measuring their ability to work, maintaining, and upgrading, it has become an essential task. This study aimed to investigate WAI and its relationship with VO2max at one of the cement companies. Materials and Methods: This cross-sectional study was conducted among 130 employees of a cement company in Iran in 2018. For data collection, the WAI, Queens's test for maximum oxygen consumption, and a questionnaire designed by researchers (socio-demographic and work-related factors) were used. SPSS 21 was used to analyze the data.  Results: The results showed that the mean ± standard deviation of WAI in staff was 39.35 ± 4.64. Among the demographic and related variables, sports activity (P > 0.04) and sleep quality (P < 0.001), and work experience (P> 0.046) were significantly correlated with WAI. There was a significant positive correlation between the mean score of WAI and Vo2max (r = 0.21, p < 0.05). Regression modeling showed that Vo2max was the only significant predictor of WAI. Conclusion: According to the results of the study, to control and enhance the ability of the staff of the study, occupational intervention programs should focus on improving sleep quality and increased exercise. Also, considering the positive relationship of Vo2max to the WAI of the surveyed staff, it is recommended to select suitable employees in terms of aerobic capacity according to the workload of the job.

scholarly journals Job satisfaction and its related factors in health care providers and health workers in Esfarayen

2019 ◽  
Author(s):  
Ahmad Sadeghi ◽  
Hasan Jafari ◽  
Hossein Rouhani ◽  
Akram Zhianifard ◽  
Maryam Siavashi
Keyword(s):  
Job Satisfaction ◽  
Health Care ◽  
Health Care Providers ◽  
Health Care Organizations ◽  
Health Workers ◽  
Demographic Variables ◽  
Care Providers ◽  
Related Factors ◽  
Care Workers ◽  
The Mean

Introduction: Job Satisfaction in Health care organizations is one of the important pillars of health promotion, due to the role they play in the prevention, care and treatment. The aim of this study was to determine the job satisfaction and its related factors in health workers in Esfarayen. Methods: This descriptive-analytical study was carried out on 140 health care workers in Esfarayen in 2017. Data was collected using Herzberg job satisfaction questionnaire, and data were analyzed using ANOVA and t-test in SPSS21 software. Results: The mean age of participant was 37 ± 8.34. Most of them were female (70%) and married (85.5%). The average of job satisfaction was 61.45 ± 7.65 (out of 100). The highest job satisfaction score was work ability (73.54 ± 1.08) and the lowest score belonged to supervision ( 49.15 ± 5.73). Among the demographic variables, Job satisfaction was significantly associated with Employment Status (P<0.05). Conclusion: Despite employees have job satisfaction, factors that increase job satisfaction of employees should be considered by the relevant authorities. Establishing suitable job standards, fair and reasonable salary, and the creation of facilities in the workplace can lead to improved employee satisfaction and, consequently, improved service quality.

scholarly journals Sleep Quality and Its Associated Factors among Low-Income Adults in a Rural Area of China: A Population-Based Study

2018 ◽  
Vol 15 (9) ◽  
pp. 2055 ◽  
Author(s):  
Wenwen Wu ◽  
Wenru Wang ◽  
Zhuangzhuang Dong ◽  
Yaofei Xie ◽  
Yaohua Gu ◽  
...  
Keyword(s):  
Sleep Quality ◽  
Low Income ◽  
Rural Areas ◽  
Population Based ◽  
Poor Sleep ◽  
Chinese Adults ◽  
Poor Sleep Quality ◽  
Related Factors ◽  
Health Related ◽  
The Mean

Background: There is limited population-based research focusing on sleep quality among low-income Chinese adults in rural areas. This study aimed to assess sleep quality among low-income adults in a rural area in China and identify the association between sleep quality and sociodemographic, lifestyle and health-related factors. Methods: The study was conducted from September to November in 2017 using a cross-sectional survey questionnaire. A total of 6905 participants were recruited via multistage, stratified cluster sampling. Data were collected using the Chinese versions of Pittsburgh Sleep Quality Index and Food Frequency Questionnaire, while we also determined the sociodemographic profiles of the participants. Results: The mean age of the sample was 58.71 ± 14.50 years, with 59.7% being male, while the mean duration of daily sleep was 5.95 ± 1.31 h, with 56.7% reportedly experiencing poor sleep quality. Multiple regression analysis revealed that older age, unemployment, lower income, disability and chronic disease comorbidities were significant factors associated with an increased risk of poor sleep quality for both genders. Moreover, married and higher education level were associated with decreased risk of poor sleep quality for females, while a meat-heavy diet and illness during the past two weeks increased the risk of poor sleep quality for males. Conclusions: Sociodemographic, lifestyle and health-related factors had an impact on the frequently poor sleep quality of low-income Chinese adults in rural areas. Thus, comprehensive measures must be developed to address the modifiable predictive factors that can possibly enhance sleep quality.

scholarly journals Intracranial pressure elevations in diffuse axonal injury: association with nonhemorrhagic MR lesions in central mesencephalic structures

2019 ◽  
Vol 131 (2) ◽  
pp. 604-611
Author(s):  
Sami Abu Hamdeh ◽  
Niklas Marklund ◽  
Anders Lewén ◽  
Tim Howells ◽  
Raili Raininko ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Linear Regression ◽  
Axonal Injury ◽  
Diffuse Axonal Injury ◽  
Related Factors ◽  
Severe Tbi ◽  
The Mean ◽  
And Diffusion ◽  
Lesion Localization ◽  
Increased Icp

OBJECTIVEIncreased intracranial pressure (ICP) in patients with severe traumatic brain injury (TBI) with diffuse axonal injury (DAI) is not well defined. This study investigated the occurrence of increased ICP and whether clinical factors and lesion localization on MRI were associated with increased ICP in patients with DAI.METHODSFifty-two patients with severe TBI (median age 24 years, range 9–61 years), who had undergone ICP monitoring and had DAI on MRI, as determined using T2*-weighted gradient echo, susceptibility-weighted imaging, and diffusion-weighted imaging (DWI) sequences, were enrolled. The proportion of good monitoring time (GMT) with ICP > 20 mm Hg during the first 120 hours postinjury was calculated and associations with clinical and MRI-related factors were evaluated using linear regression.RESULTSAll patients had episodes of ICP > 20 mm Hg. The mean proportion of GMT with ICP > 20 mm Hg was 5%, and 27% of the patients (14/52) spent more than 5% of GMT with ICP > 20 mm Hg. The Glasgow Coma Scale motor score at admission (p = 0.04) and lesions on DWI sequences in the substantia nigra and mesencephalic tegmentum (SN-T, p = 0.001) were associated with the proportion of GMT with ICP > 20 mm Hg. In multivariable linear regression, lesions on DWI sequences in SN-T (8% of GMT with ICP > 20 mm Hg, 95% CI 3%–13%, p = 0.004) and young age (−0.2% of GMT with ICP > 20 mm Hg, 95% CI −0.07% to −0.3%, p = 0.002) were associated with increased ICP.CONCLUSIONSIncreased ICP occurs in approximately one-third of patients with severe TBI who have DAI. Age and lesions on DWI sequences in the central mesencephalon (i.e., SN-T) are associated with elevated ICP. These findings suggest that MR lesion localization may aid prediction of increased ICP in patients with DAI.

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