scholarly journals Impact of Sample Size and Maximum Aggregate Grain on the Representativeness of Concrete Samples

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3358
Author(s):  
Jacek Śliwiński ◽  
Patrycja Duży
Keyword(s):  
Sample Size ◽  
Extreme Values ◽  
Maximum Size ◽  
Minimum Size ◽  
Slight Variation ◽  
Concrete Composition ◽  
Cross Sectional ◽  
Two Parameters ◽  
The Impact ◽  
Composition Changes

One of the basic criteria for the representativeness of composite material samples is the similarity of the quantitative and qualitative composition of the material in the sample to that of the material it represents. The article presents the results of experimental research concerning the impact of the ratio of the minimum size of cubic concrete samples (lmin) to the maximum size of aggregate grain (Dmax). The content of the basic components of concrete, i.e., coarse aggregate, mortar, sand and cement paste, was analysed. The content of these components in the concrete sample was identified by means of analysis of the sample cross-sectional image, and then, compared with the contents resulting from the concrete mixture proportion. Cases where lmin/Dmax was between 2.38 and 12.5 were analysed. The results of the study indicate a moderate correlation between these two parameters. The largest discrepancies between the component contents of the sample and the controlled concrete were usually recorded at the extreme values of the lmin/Dmax ratio. These discrepancies, depending on the component in question, range from approx. −15 to approx. +15%. Acceptable deviations (≤ ±5%) result in the value of this ratio within the estimated range between approximately 5.0 and approximately 10.0. In existing standards, the use of samples that meet the requirement lmin/Dmax ≥ 3.0 or 3.5 is recommended. In light of the presented test results, this requirement is sufficient for the material properties that are not sensitive to slight variation in concrete composition, i.e., compressive and tensile strength. The presented results are useful in the case of sample size selection for the study of concrete properties which are most sensitive to concrete composition changes. These properties include water absorption, permeability to liquids and gases, thermal properties, etc.

scholarly journals Depression Levels Of Prisons In Class II A Correctional Institutions Bulukumba Regency

2020 ◽  
Vol 4 (3) ◽  
pp. 107-115
Author(s):  
Safruddin ◽  
Nurlina ◽  
Anel Ariansyah
Keyword(s):  
Sample Size ◽  
Research Design ◽  
Depressive Disorders ◽  
Suicide Attempts ◽  
Sampling Technique ◽  
Class Ii ◽  
Mild Depression ◽  
Cross Sectional ◽  
The People ◽  
The Impact

A depressive disorder is a serious mental problem characterized by feelings of anxiety and sadness. Depressive disorders have increased from year to year, where the total number of people living with depression in the world is 322 million, this is supported by WHO 2017 data. Generally, someone in a depressed state experiences feelings of sadness, anxiety, or emptiness, and the impact that is caused if depression is not treated immediately, it will have an impact on oneself such as low self-esteem, social isolation, and even suicide attempts. Besides that, it will also have an impact on the people around it. The purpose of this study is to know the description of the level of depression in prisoners in Class II A Penitentiary in Bulukumba Regency in 2020. The research design used in this study is a descriptive research design with a cross-sectional approach. The affordable population in this study were inmates with all cases totaling 194 people with a sample size of 85 respondents. The sampling technique using a systematic random sampling method selects a sample from the population systematically. Data were collected using a questionnaire sheet. Based on the results of the research conducted, it was shown that the frequency distribution of the level of depression of the 85 prisoner respondents experienced mild depression as many as 64 respondents (75.3%) then moderate depression was 14 respondents (16.5%) and 7 respondents (8.2%) were not depressed. In all cases, the depression level of prisoners in class II A prisons in Bulukumba district experienced mild depression. Researchers suggest that further the sample size can be added so that data collection is more accurate and can be linked to other variables that can cause depression

scholarly journals 44 Examining the Impact of the COVID-19 Pandemic on Participants in a Longitudinal Study of Burn Outcomes

2021 ◽  
Vol 42 (Supplement_1) ◽  
pp. S32-S33
Author(s):  
Brian M Kelter ◽  
Audrey E Wolfe ◽  
Callie Abouzeid ◽  
Nicole S Gibran ◽  
Radha K Holavanahalli ◽  
...  
Keyword(s):  
Propensity Score ◽  
Sample Size ◽  
Satisfaction With Life Scale ◽  
National Database ◽  
Cross Sectional ◽  
Time Points ◽  
Outcome Scores ◽  
The Impact ◽  
Time Point

Abstract Introduction The COVID-19 pandemic has had widespread effects on healthcare and society at large. There are limited data on the impact of the pandemic on the long-term recovery of the burn survivor. This study aims to compare physical and psychosocial outcomes of the burn survivor population before and during the COVID-19 pandemic. Methods Data from the Burn Model System National Database (2015-present) were analyzed. Data were divided into pre- and during-pandemic groups (before and after March 1st, 2020). Outcomes were compared at four cross-sectional time points: 6, 12, 24, and 60 months after burn injury. The following patient reported outcome measures were examined: SF-12 Health Survey, PROMIS-29, Post-Traumatic Growth Indicator, Community Integration Questionnaire, Patient Civilian Checklist, Satisfaction with Life Scale, Burn Specific Health Scale, NeuroQOL Stigma, 4-D Itch, and CAGE Questionnaire (drug/alcohol misuse). Given the cross-sectional design, potential differences in clinical and demographic characteristics were examined for each group at each time point. Adjusted mean outcome scores at each time point were compared between groups using a two stage multi-variable regression model with propensity score matching. For each time point, subjects from each group were matched. The propensity score was calculated using the following matching variables: gender, age, race, ethnicity, etiology, length of stay, and burn size. The mean score difference of outcomes within each matched sample was examined. Results Sample sizes varied by time point with a range from 420 at 6 months to 94 at 60 months. The during-COVID group comprised 10% of the total sample size. There were no significant differences in demographic and clinical characteristics between the groups at any time point. There were no significant differences between the groups in adjusted mean outcome scores across the different time points. Conclusions This preliminary examination showed no differences in myriad long-term outcomes at multiple time points after injury among burn survivors before and during the start of the COVID-19 pandemic. The results may suggest an element of resilience, however given the sample size and cross-sectional limitations further investigation is required to better understand the impact of COVID-19 on the burn population.

scholarly journals The impact of restorative treatment on tooth loss prevention

2003 ◽  
Vol 17 (2) ◽  
pp. 166-170 ◽  
Author(s):  
Arnaldo de França Caldas Junior ◽  
Renata Cimões Jovino Silveira ◽  
Wagner Marcenes
Keyword(s):  
Tooth Loss ◽  
Cross Sectional Study ◽  
Insurance Companies ◽  
Minimum Size ◽  
Socioeconomic Indicators ◽  
Dental Services ◽  
Cross Sectional ◽  
Restorative Treatment ◽  
Dmft Index ◽  
The Impact

A cross-sectional study was carried out to analyze tooth loss resulting from caries in relation to the number of times the extracted tooth had been restored, the type of caries diagnosed (primary or secondary), and socioeconomic indicators of patients from the city of Recife, Brazil. Ten public health centres and ten centres associated with health insurance companies were randomly selected. The size of the sample was calculated using a standard error of 2.5%. A confidence interval of 95% and a 50% prevalence of reasons for extractions were used for calculating the sample. The minimum size of the sample for meeting these requirements was 381 patients. Patients were randomly selected from the list of adults registered at each centre. A total of 410 patients were invited to take part in the study. The response rate was 100%, but 6 patients were excluded due to incompleteness of data in the questionnaire applied. An assessment was made to obtain the number of decayed, missing or filled teeth (DMFT index) and the reasons for extraction. The results showed a highly significant (p < 0.001) relationship between the number of times the tooth indicated for extraction had been restored and the reason for extraction being caries. Furthermore, the majority of teeth extracted due to caries had been restored two or more times. A highly statistically significant association was also observed between one indicator of use of dental services (F/DMFT) and extraction due to caries (p < 0.001). The findings questioned the belief that tooth loss can be prevented in the general population by merely providing restorative treatment.

Multidisciplinary team decision is rare and decreasing in percutaneous vascular interventions despite positive impact on in-hospital outcomes

VASA ◽  
2019 ◽  
Vol 48 (3) ◽  
pp. 262-269 ◽  
Author(s):  
Christian-Alexander Behrendt ◽  
Tilo Kölbel ◽  
Thea Schwaneberg ◽  
Holger Diener ◽  
Ralf Hohnhold ◽  
...  
Keyword(s):  
Multidisciplinary Team ◽  
Positive Impact ◽  
Cross Sectional Study ◽  
Invasive Treatment ◽  
Cross Sectional ◽  
Hospital Outcomes ◽  
Vascular Intervention ◽  
Medical Specialties ◽  
Team Decision ◽  
The Impact

Abstract. Background: Worldwide prevalence of peripheral artery disease (PAD) is increasing and peripheral vascular intervention (PVI) has become the primary invasive treatment. There is evidence that multidisciplinary team decision-making (MTD) has an impact on in-hospital outcomes. This study aims to depict practice patterns and time changes regarding MTD of different medical specialties. Methods: This is a retrospective cross-sectional study design. 20,748 invasive, percutaneous PVI of PAD conducted in the metropolitan area of Hamburg (Germany) were consecutively collected between January 2004 and December 2014. Results: MTD prior to PVI was associated with lower odds of early unsuccessful termination of the procedures (Odds Ratio 0.662, p < 0.001). The proportion of MTD decreased over the study period (30.9 % until 2009 vs. 16.6 % from 2010, p < 0.001) while rates of critical limb-threatening ischemia (34.5 % vs. 42.1 %), patients´ age (70 vs. 72 years), PVI below-the-knee (BTK) (13.2 % vs. 22.4 %), and rates of severe TASC C/D lesions BTK (43.2 % vs. 54.2 %) increased (all p < 0.001). Utilization of MTD was different between medical specialties with lowest frequency in procedures performed by internists when compared to other medical specialties (7.1 % vs. 25.7 %, p < 0.001). Conclusions: MTD prior to PVI is associated with technical success of the procedure. Nonetheless, rates of MTD prior to PVI are decreasing during the study period. Future studies should address the impact of multidisciplinary vascular teams on long-term outcomes.

Factors Influencing Academic Stress on Students of University of Economics and Business - Vietnam National University

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Nham Phong Tuan ◽  
Nguyen Ngoc Quy ◽  
Nguyen Thi Thanh Huyen ◽  
Hong Tra My ◽  
Tran Nhu Phu
Keyword(s):  
Academic Stress ◽  
Stress Factors ◽  
Negative Effects ◽  
Cross Sectional ◽  
Stress Scale ◽  
Perceptions And Attitudes ◽  
National University ◽  
Questionnaire Surveys ◽  
The University ◽  
The Impact

The objective of this study is to investigate the impact of seven factors causing academic stress on students of University of Economics and Business - Vietnam National University: Lack of leisure time, Academic performance, Fear of failure, Academic overload, Finances, Competition between students, Relationships with university faculty. Based on the results of a practical survey of 185 students who are attending any courses at the University of Economics and Business - Vietnam National University, the study assesses the impact of stress factors on students. The thesis focuses on clarifying the concept of "stress" and the stress level of students, while pointing out its negative effects on students. This study includes two cross-sectional questionnaire surveys. The first survey uses a set of 16 questions to assess students’ perceptions and attitudes based on an instrument to measure academic stress - Educational Stress Scale for Adolescents (ESSA). The second survey aims to test internal consistency, the robustness of the previously established 7-factor structure. Henceforth, the model was brought back and used qualitatively, combined with Cronbach’s Alpha measurement test and EFA discovery factor analysis. This study was conducted from October 2019 to December 2019. From these practical analyzes, several proposals were made for the society, the school and the students themselves.

The impact of the use of a footrest on the quality of chest compressions. A prospective, randomized, cross-sectional study

2018 ◽  
Vol 31 (3) ◽  
Author(s):  
Jolanta Majer ◽  
Sandra Pyda ◽  
Jerzy Robert Ladny ◽  
Antonio Rodriguez-Nunez ◽  
Lukasz Szarpak
Keyword(s):  
Cross Sectional Study ◽  
Sectional Study ◽  
Chest Compressions ◽  
Cross Sectional ◽  
The Impact

Awareness of symptomatic differences Covid-19, SARS, Swine Flu, Common cold among dental students

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 1026-1033
Author(s):  
Nivedha Valliammai Mahalingam ◽  
Abilasha R ◽  
Kavitha S
Keyword(s):  
Infectious Diseases ◽  
Undergraduate Students ◽  
Common Cold ◽  
Emerging Infectious Diseases ◽  
Dental Students ◽  
Swine Flu ◽  
Viral Diseases ◽  
Surveillance Systems ◽  
Cross Sectional ◽  
The Impact

Enormous successes have been obtained against the control of major epidemic diseases, such as SARS, MERS, Ebola, Swine Flu in the past. Dynamic interplay of biological, socio-cultural and ecological factors, together with novel aspects of human-animal interphase, pose additional challenges with respect to the emergence of infectious diseases. The important challenges faced in the control and prevention of emerging and re-emerging infectious diseases range from understanding the impact of factors that are necessary for the emergence, to development of strengthened surveillance systems that can mitigate human suffering and death. The aim of the current study is to assess the awareness of symptomatic differences between viral diseases like COVID-19, SARS, Swine flu and common cold among dental students that support the prevention of emergence or re-emergence. Cross-sectional type of study conducted among the undergraduate students comprising 100 Subjects. A questionnaire comprising 15 questions in total were framed, and responses were collected in Google forms in SPSS Software statistical analysis. The study has concluded that dental students have an awareness of the symptomatic differences between infectious viral disease. The study concluded that the awareness of symptomatic differences between viral diseases like COVID-19, SARS, Swine flu, Common cold is good among the dental students who would pave the way for early diagnosis and avoid spreading of such diseases. A further awareness can be created by regular webinars, seminars and brainstorming sessions among these healthcare professionals.

Relationship between Code of Corporate Governance and Corporate Financial Performance (An Empirical Study of Food Companies Listed on KSE)

GIS Business ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. 01-09
Author(s):  
Asma Rafique Chughtai ◽  
Afifa Naseer ◽  
Asma Hassan
Keyword(s):  
Corporate Governance ◽  
Stock Exchange ◽  
Securities And Exchange Commission ◽  
Executive Directors ◽  
Agency Conflicts ◽  
Cross Sectional ◽  
Return On Equity ◽  
Governance Practices ◽  
Code Of Corporate Governance ◽  
The Impact

The crucial role that implementation of Code of Corporate Governance plays on protecting the rights of minorities, shareholders, local as well as foreign investors cannot be denied. Companies all over the world are required to implement their respective Code of Corporate Governance for avoiding agency conflicts between companies management and stakeholders and for assuring transparency in accountability. This paper aims at exploring the impact of implementation of corporate governance practices (designed by Securities and Exchange Commission of Pakistan) have on the financial position of companies. For explanatory variables of the study, composition of the board as per the Code of Corporate Governance that comprises of presence of independent, executive and non-executive directors has been taken into consideration. Return on equity has been taken as an indicator of firms profitability i.e. the dependent variable. For this study, companies listed on food producing sector of Karachi Stock Exchange have been screened for excogitation of the relationship. It is an empirical research based on nine years data from 2007–2015. Using Hausman Test for selecting the data analysis technique between Fixed or Random, Fixed Cross Sectional Panel Analysis has been used for analysis of the data collected. Findings indicate that presence of independent, executive and non-executive directors as per the code requirements levies a significant impact on the profitability of companies indicated by return on equity. It is, thus concluded that companies should ensure compliance with code of governance practices to reduce not only the agency issues but also to increase their profitability.

Diversity and the Performance of Selected Financial Institutions of Asia

2018 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Shafaque Fatima ◽  
Saqib Sharif
Keyword(s):  
Financial Institutions ◽  
Positive Impact ◽  
Financial Institution ◽  
Gender Diversity ◽  
Business Case ◽  
Ordinary Least Squares ◽  
Cross Sectional ◽  
Age Diversity ◽  
The Impact ◽  
Nationality Diversity

Linking with the business case for diversity, this study examines whether the top management team (TMT) and the board of directors (BODs) diversity has a positive impact on financial institution (FI) performance in select countries of Asia least researched domain. We use data from 119 financial institutions across Asia for the year 2015, initially 1,447 institutions; however, incomplete data was excluded from final analysis. We use three proxies for diversity, that is, nationality diversity, gender diversity, and age diversity of TMT and BODs. To investigate the impact of TMT and BODs diversity, cross-sectional ordinary least-squares estimation is applied, using Return on Average Assets (ROAA%) as a measure of performance.  We find that nationality diversity and age diversity is positively and significantly related to FIs performance. Our evidence indicates that executives and board members with diverse exposure and younger age improve FIs profitability. However, there is no significant relationship between gender and FIs performance.

HUBUNGAN PEMBERIAN ASI EKSKLUSIF DENGAN KEJADIAN STUNTING PADA BALITA USIA 1-5 TAHUN DIPUSKESMAS SUKAHENING KECAMATAN SUKAHENING KABUPATEN TASIKMALAYA

2020 ◽  
Vol 13 (2) ◽  
pp. 109
Author(s):  
Yuyun Sarinengsih
Keyword(s):  
Public Health ◽  
Health Center ◽  
Exclusive Breastfeeding ◽  
Growth Failure ◽  
Sampling Technique ◽  
Not Given ◽  
Chi Square ◽  
Cross Sectional ◽  
Public Health Center ◽  
The Impact

ABSTRAKStunting yaitu keadaan gagal tumbuh akibat dari kekurangan gizi kronis. Prevalensi stunting di Kabupaten Tasikmalaya menempati urutan keempat, dimana kecamatan Sukahening menempati urutan pertama tertinggi dengan jumlah 155 balita mengalami stunting. Faktor yang dapat mempengaruhi kejadian stunting yaitu pengasuhan anak yang kurang baik dimana tidak diberikannya ASI secara Ekslusif. Pencegahan stunting yaitu pada 1000 hari kehidupan dimana salah satunya pemberian ASI secara Ekslusif.Penelitian ini bertujuan untuk mengetahui hubungan antara pemberian ASI Ekslusif dengan kejadian stunting pada balita 1-5 tahun di Puskesmas Sukahening Kecamatan Sukahening Kabupaten Tasikmalaya.Jenis Penelitian yang digunakan adalah deskriptif korelasional dengan pendekatan cross-sectional. Populasi total sampling sebanyak 95 responden menggunakan teknik purposive sampling.Hasil Penelitian diperoleh lebih dari setengah responden 51,6% tidak diberikan ASI secara Ekslusif, dan sebagian besar 65,3% balita mengalami stunting. Hasil perhitungan chi-square diperoleh ρ.value (0,000<0,05) maka H0 ditolak sehingga terdapat hubungan antara Pemberian ASI Ekslusif dengan kejadian stunting pada balita 1-5 tahun di Puskesmas Sukahening Kecamatan Sukahening Kabupaten Tasikmalaya.Hasil penelitian ini diharapkan dapat memberi informasi yang bermanfaat dan perlu dilakukan pendidikan kesehatan ulang yang terjadwal terkait nutrisi yang terjangkau dan sehat sehingga dapat meningkatkan cakupan ASI Ekslusif dan dapat menurunkan angka stunting.Kata Kunci : ASI Ekslusif, StuntingDaftar Pustaka : 25 buku (2010-2018)9 jurnal (2013-2019)2 Website (2010-2017) ABSTRACTStunting is a condition of growth failure due to chronic malnutrition. The stunting prevalence in Tasikmalaya Regency was at the fourth place where Sukahening sub-district was at the highest with 155 stunting. Factor that can influence the occurrence of stunting is a poor parenting where exclusive breastfeeding is not given. The best prevention of stunting is on 1000 days of life where exclusive breastfeeding is given. The impact, if the baby is not given exclusive breastfeeding, they will lack of nutrition and also will have an impact on the growth or inappropriate height. This aims of the research is to determine the relationship between exclusive breastfeeding and the incidence of stunting on toddler under 5 years of at Sukahening Public Health Center, Sukahening Sub district, Tasikmalaya Regency. The type of research used is descriptive correlation with a cross-sectional approach. The total samplings were 95 respondents which used purposive sampling technique. The results of the research were obtained more than half of the respondents 51.6% were given exclusive breastfeeding, and most 65.3% of children under five had stunting. The chi-square calculation results obtained that ρ.value (0,000 <0,05) then H0 is rejected so that there is a relationship between exclusive breastfeeding and the incidence of stunting on toddlers under 5 years in Sukahening Public Health Center, Sukahening Sub district, Tasikmalaya Regency. Performed the health education related to affordable and healthy nutrition so that it can increase the coverage of exclusive breastfeeding and can reduce stunting rates. Keywords : Exclusive breastfeeding, Stunting Bibliography : 25 books (2010-2018) 9 journals (2013-2019) 2 Websites (2010-2017) 

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