Vertical Changes in Density, Size Structure and Shell Shape of the Bivalve Lasaea Undulata Within Intertidal Mussel Beds

1996 ◽  
Vol 76 (2) ◽  
pp. 417-430 ◽  
Author(s):  
Keiji Iwasaki
Keyword(s):  
Significant Positive Correlation ◽  
Size Structure ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Shell Shape ◽  
Mussel Beds ◽  
Significant Difference ◽  
Intertidal Mussel ◽  
Vertical Changes ◽  
Specific Association

Vertical changes in density, size structure and shell shape of Lasaea undulata (Bivalvia: Galeommatoidea) inhabiting intertidal mussel beds were studied at Wakayama Prefecture, Japan. At the study site, where two mytilids Septifer virgatus and Hormomya mutabilis formed vertically contiguous mussel beds, Lasaea density decreased downshore within the S. virgatus bed of the upper and mid zones. Few individuals were found within the H. mutabilis bed of the lower zone. Multiple linear regression analysis revealed that shore height was the only factor which showed a significant, positive correlation with density. Size structure differed between the upper and lower parts of the S. virgatus bed, suggesting that reproductive periods or growth rates of L. undulata differed with shore height. Prodissoconch length and shell shape were also different among shore heights. Number, size and shell shape of juveniles brooded within parents indicated that this species releases its young as non-planktotrophic, crawl-away juveniles. There was no significant difference in density of recruits between artificial mussel clumps of S. virgatus and H. mutabilis within enclosure cages, and no specific association was detected between L. undulata and either of the two mussel species.

scholarly journals PENGARUH SOSIALISASI, SANKSI, SISTEM E-FILING, TARIF, DAN KUALITAS PELAYANAN FISKUS TERHADAP KEPATUHAN WAJIB PAJAK

2021 ◽  
pp. 1127
Author(s):  
Neng Rosita Dewi ◽  
Argan Gani Asalam
Keyword(s):  
Significant Positive Correlation ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Primary Data ◽  
Tax Revenue ◽  
Collection Method ◽  
Filing System ◽  
Convenience Sampling ◽  
Descriptive Statistical Analysis

In Indonesia, the largest income is through taxes to finance various state needs. Especially in the APBN, there is an important role that is owned by taxes, but tax revenues in the APBN in Indonesia have not been maximized. With not maximal tax revenue in Indonesia, discipline, awareness and compliance of taxpayers is very much needed to comply with applicable tax obligations. The purpose of this research is to be able to see the effect of socialization, sanctions, e-filing system, tariffs and quality of tax services on the compliance of individual UMKM taxpayers. This research uses quantitative primary data techniques. The population in this research is individual UMKM taxpayers registered at (KPP) Pratama Cimahi 2020 using convenience sampling and the sample used is 100 samples. This research uses a questionnaire with a Likert scale of 1-5 as the collection method. This research was analyzed using descriptive statistical analysis and multiple linear regression analysis. The results in this research state that socialization, sanctions, e-filing system, tariffs and quality of tax service services simultaneously (simultaneously) have a significant correlation to taxpayer compliance. In addition, the variables of socialization, sanctions and tariffs separately (partial) have a significant positive correlation with taxpayer compliance, but the variables of the e-filing system and service quality of the tax authorities separately (partial) do not have a significant correlation with taxpayer compliance

scholarly journals Faktor-Faktor yang Mempengaruhi Keberkesanan Amali Kerja Kayu dari Perspektif Pelajar Sekolah Menengah Vokasional di Provinsi Acheh

2017 ◽  
Vol 9 (1-5) ◽  
Author(s):  
Lailan Fachrah ◽  
Nor Azlina Hasbullah ◽  
Ashah Ab Rahman
Keyword(s):  
Linear Regression Analysis ◽  
Demographic Factors ◽  
Multiple Linear Regression Analysis ◽  
Vocational Schools ◽  
Student Interest ◽  
Security Issues ◽  
Equipment Safety ◽  
Significant Difference ◽  
Hands On ◽  
Stepwise Method

This study aims to identify factors that influence the effectiveness of practical woodworking and determine the effectiveness of practical woodworking from the perspective of students of secondary vocational schools in the province of Aceh. Factors studied were the workshop equipment, safety workshops, teaching skills, the workshop environment and student interest. This study was designed to investigate the significant differences concerning factors woodworking practical effectiveness based on demographic factors. A total of 130 respondents were randomly selected from six vocational schools in the province of Aceh. The instrument consists of a set of questionnaire consisting of 49 items and distributed to second level students. Data analysis using the two types of statistics, namely descriptive statistics and statistical inference. The results showed no significant difference between factors woodworking practical effectiveness based on demographic factors except the income level of parents and the parents of the respondents work. The results of multiple linear regression analysis stepwise method found that only four factors (environmental factors workshops, the students interest, the skills of teachers and workshop equipment factors) that affect the practical effectiveness of woodworking with the correlation coefficient R = 0.779. This shows there is a significant effect of the four factors, the effectiveness of practical woodworking, accounting for 60.6% (R2 = 0.606) changes in the variance in effectiveness of hands-on woodworking, and between the four factors, the workshop environment is the factor that most influences the effectiveness practical woodworking by contributing 43.3% (R2 = 0.433) of the variance in effectiveness of practical woodworking. The main implication of this study is the need for attention from the authorities to be more serious in efforts to improve the facilities and infrastructure in the workshop as well as security issues in practical workshops so that the effectiveness of the woodwork to be more robust.

scholarly journals PENGARUH GAYA HIDUP, SIKAP UANG, NILAI PRIBADI, STIMULASI PEMASARAN TERHADAP KEPUTUSAN PEMBELIAN TERHADAP SMARTPHONE ANDROID (Studi Kasus Mahasiswa Muhammadiyah Stikes Banjarmasin)

2019 ◽  
Vol 6 (1) ◽  
pp. 26
Author(s):  
Arina Putri ◽  
Nuril Huda
Keyword(s):  
Significant Relationship ◽  
Personal Values ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Purchase Decision ◽  
Decision Variables ◽  
Analysis Technique ◽  
Significant Difference ◽  
Money Attitude ◽  
Strongly Agree

<p><em>This study aims to identify and analyze the influence of lifestyle variables (X1), money attitude (X2), personal values (X3), marketing stimulation (X4) on purchase decisions (Y).</em></p><p><em>Methods This study uses qualitative research by distributing questionnaires to students stikes muhammadiyah Banjarmasin ever using smartphones as much as 157 respondents. Using variable measurement technique kiteria interval scale from strongly agree to strongly disagree, with weights from 1 - 10. To determine the effect of variable X to variable Y using multiple linear regression analysis technique.</em></p><p><em>Results of this study conclude that (1) There is a significant difference between lifestyle variables to variable purchase decision. (2) There is a significant relationship between the variables attitude toward money purchase decision variables. (3) There is a significant relationship between the variables of personal values to the variable purchase decision. (4) There is no significant relationship between the variables of marketing stimulation to variable purchase decision.</em></p>

scholarly journals Implementation of a Blind Quality Control Program in Blood Alcohol Analysis

2019 ◽  
Vol 43 (8) ◽  
pp. 630-636 ◽  
Author(s):  
Jackeline Moral ◽  
Callan Hundl ◽  
Dayong Lee ◽  
Maddisen Neuman ◽  
Aimee Grimaldi ◽  
...  
Keyword(s):  
Quality Control ◽  
Linear Regression Analysis ◽  
Control Program ◽  
Multiple Linear Regression Analysis ◽  
Blood Alcohol ◽  
Proficiency Tests ◽  
Science Center ◽  
Quality Control Program ◽  
Significant Difference ◽  
The Difference

Abstract Declared proficiency tests are limited in their use for testing the performance of the entire system, because analysts are aware that they are being tested. A blind quality control (BQC) is intended to appear as a real case to the analyst to remove any intentional or subconscious bias. A BQC program allows a real-time assessment of the laboratory’s policies and procedures and monitors reliability of casework. In September 2015, the Houston Forensic Science Center (HFSC) began a BQC program in blood alcohol analysis. Between September 2015 and July 2018, HFSC submitted 317 blind cases: 89 negative samples and 228 positive samples at five target concentrations (0.08, 0.15, 0.16, 0.20 and 0.25 g/100 mL; theoretical targets). These blood samples were analyzed by a headspace gas chromatograph interfaced with dual-flame ionization detectors (HS-GC-FID). All negative samples produced `no ethanol detected’ results. The mean (range) of reported blood alcohol concentrations (BACs) for the aforementioned target concentrations was 0.075 (0.073–0.078), 0.144 (0.140–0.148), 0.157 (0.155–0.160), 0.195 (0.192–0.200) and 0.249 (0.242–0.258) g/100 mL, respectively. The average BAC percent differences from the target for the positive blind cases ranged from −0.4 to −6.3%, within our uncertainty of measurement (8.95–9.18%). The rate of alcohol evaporation/degradation was determined negligible. A multiple linear regression analysis was performed to compare the % difference in BAC among five target concentrations, eight analysts, three HS-GC-FID instruments and two pipettes. The variables other than target concentrations showed no significant difference (P > 0.2). While the 0.08 g/100 mL target showed a significantly larger % difference than higher target concentrations (0.15–0.25 g/100 mL), the % differences among the higher targets were not concentration-dependent. Despite difficulties like gaining buy-in from stakeholders and mimicking evidence samples, the implementation of a BQC program has improved processes, shown methods are reliable and added confidence to staff’s testimony in court.

scholarly journals Fatigue in patients with epilepsy and its association with depression and sleep quality

2013 ◽  
Vol 71 (8) ◽  
pp. 533-536 ◽  
Author(s):  
Gisele S. M. Leite Neves ◽  
Marleide da Mota Gomes
Keyword(s):  
Sleep Quality ◽  
Daytime Sleepiness ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Cross Sectional Study ◽  
Depression And Anxiety ◽  
Cross Sectional ◽  
Tertiary Center ◽  
Significant Difference ◽  
Patients With Epilepsy

OBJECTIVE: It was to evaluate the relationships between fatigue and excessive daytime sleepiness, sleep quality, depression and anxiety. METHODS: This was a cross-sectional study on 98 unselected adult patients with epilepsy (PWE) at a tertiary center. It used clinical-sociodemographic characteristics, fatigue measured by the SF-36 vitality subscale (VsSF-36) and the Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index and Beck Depression and Anxiety Inventories. RESULTS: We observed that our patients presented vitality or fatigue similar to drivers with chronic headaches evaluated in the same city. Fatigue was related to depression, anxiety and sleep quality, but not to daytime sleepiness. A multiple linear regression analysis was conducted and we observed that fatigue was independently correlated with depression and quality of sleep. However, no significant difference was observed regarding seizure frequency or number of antiepileptic drugs. CONCLUSION: Fatigue needs to be studied more in PWE, and its risk factors need to be controlled, along with sleep quality and psychiatric disorders.

scholarly journals Development of Pharyngocutaneous Fistula after Total Laryngectomy: The Predictive Value of C-reactive Protein/Albumin Ratio

2020 ◽  
Vol 63 (4) ◽  
pp. 159-163
Author(s):  
Abitter Yücel ◽  
Hilal Yücel ◽  
Fuat Aydemir ◽  
Mert Mutaf ◽  
Mehmet Akif Eryılmaz ◽  
...  
Keyword(s):  
Postoperative Period ◽  
Total Laryngectomy ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Early Postoperative Period ◽  
Pharyngocutaneous Fistula ◽  
C Reactive Protein ◽  
Albumin Ratio ◽  
Reactive Protein ◽  
Significant Difference

Background: We aimed to evaluate whether C-reactive protein(CRP)/ Albumin ratio (CAR) performed in the early postoperative period after total laryngectomy could be a predictive factor for the development of pharyngocutaneous fistula (PCF). Methods: The files of patients with laryngeal squamous cell carcinoma who underwent total laryngectomy between January 2005 and January 2019 were retrospectively reviewed. Patients were divided into two groups: patients with PCF (PCF group) and without (Non-PCF group). CAR values and risk factors were compared between groups. Results: The overall incidence of PCF was 23.2%. There was a statistically significant difference between the two groups in terms of CRP and CAR levels (p = 0.001). The CAR value of 27.05 (sensitivity = 75.0% , specificity 68.2%, area under curve (AUC) = 0.742, 95% confidence interval 0.616–0.868) was determined as a cutoff value to describe the development of fistula in the early postoperative period. In multiple linear regression analysis, there was an independent relationship between presence of PCF and previous RT and CAR value. Conclusions: CAR, performed in the early postoperative period, may be a new and useful marker for predicting PCF after total laryngectomy.

Effect of Gamified Mobile Applications and the Role of Player Types on the Achievement of Students

2022 ◽  
pp. 073563312110656
Author(s):  
Feray Ugur-Erdogmus ◽  
Recep Çakır
Keyword(s):  
Undergraduate Students ◽  
Design Research ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Mobile App ◽  
Control Group ◽  
Achievement Scores ◽  
Control Group Design ◽  
Significant Difference ◽  
And Control

The purpose of this study was to examine a gamified mobile application’s effect on students’ achievement, and whether the player types of the students predicted their achievement scores. A “pretest-posttest control group design” research was conducted with 65 undergraduate students taking a compulsory online course. In the study, a gamified mobile app was developed by the researchers and then applied within an online History I course. The results of the study showed no significant difference between the achievement scores of the Experimental Group and Control Group students. However, multiple linear regression analysis results showed that the Experimental Group’s students’ achievement scores were significantly predicted by the player types they used and their mobile app performance. It is argued, therefore, that this result underlines the importance of player type in designing effective mobile gamification apps for the purpose of learning. Suggestions for further studies are also provided.

scholarly journals Which Hard and Soft Tissue Factors Relate with the Amount of Buccal Corridor Space during Smiling?

2008 ◽  
Vol 78 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Il-Hyung Yang ◽  
Dong-Seok Nahm ◽  
Seung-Hak Baek
Keyword(s):  
Regression Analysis ◽  
Soft Tissue ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Tissue Factors ◽  
Buccal Corridor

Abstract Objective: To investigate which hard and soft tissue factors relate with the amount of buccal corridor area (BCA) during posed smiling. Materials and Methods: The samples consisted of 92 adult patients (19 men and 73 women; 56 four first bicuspids extraction and 36 nonextraction treatment cases; mean age = 23.5 years), who were treated only with a fixed appliance and finished with Angle Class I canine and molar relationships. To eliminate the crowding effect on the buccal corridor area, lateral cephalograms, dental casts, and standardized frontal posed smile photographs were obtained at debonding stage and 28 variables were measured. Pearson correlation analysis, multiple linear regression analysis, and independent t-test were used to find variables that were related with buccal corridor area ratio (BCAR). Results: Among the lateral cephalometric and dental cast variables, FMA, lower anterior facial height, upper incisor (U1) exposure, U1 to facial plane, lower incisor (L1) to mandibular plane, L1 to N-B, Sn (subnasale) to soft tissue menton (Me′), Sn to stomodium superius (stms), stms to Me′, and interpremolar width were significantly negatively correlated with BCAR. Occlusal plane inclination and buccal corridor linear ratio did not show any significant correlation with BCAR. Multiple linear regression analysis generated a three-variable model: Sn to Me′, U1 exposure, and sum of tooth material (STM) (R2 = 0.324). There was no significant difference in BCAR between extraction and nonextraction groups. Conclusions: To control the amount of BCA for achieving a better esthetic smile, it is necessary to observe the vertical pattern of the face, amount of upper incisor exposure, and sum of the tooth material.

scholarly journals Body fat patterning and blood pressure levels: a comparative study between the Rai and the Lepcha in Sikkim

2021 ◽  
Vol 84 (2) ◽  
pp. 133-149
Author(s):  
Swagato Pramanik ◽  
Nivedita Som ◽  
Subho Roy
Keyword(s):  
Blood Pressure ◽  
Ethnic Groups ◽  
Body Fat ◽  
Ethnic Diversity ◽  
Linear Regression Analysis ◽  
Belief System ◽  
Multiple Linear Regression Analysis ◽  
The Body ◽  
Analysis Of Covariance ◽  
Significant Difference

Abstract We compared the perception of two ethnic groups in relation to health, obesity and blood pressure problems and its management, and to compare the body fat patterning and blood pressure levels between Rai and Lepcha ethnic groups. We chose Rai and Lepcha ethnic groups living in Ranka, a place which is 16 kilometres away from the city of Gangtok, Sikkim. The study involved 160 males (Rai = 80 and Lepcha = 80) of age 25–35 years. The participants were initially interviewed about their perception towards health, obesity and blood pressure problems and its management along with other socio-demographic and lifestyle variables. Later, body fat patterning and blood pressure levels of the participants were measured and compared between these two groups. Multiple linear regression analysis was performed to understand the association of body fat patterning and blood pressure levels with socio-demographic and lifestyle variables. Multivariate analysis of covariance (MANCOVA) was used to examine the relationship of ethnicity with both body fat patterning and blood pressure levels. We found a noticeable difference between Lepcha and Rai ethnic groups in perception towards health and obesity, blood pressure problems and its management. Similarly, a significant difference was observed in body fat patterning and blood pressure levels between Rai and Lepcha participants. MANCOVA revealed that the measures of body fat pattering and blood pressure levels differed significantly between these two ethnic groups, after controlling for lifestyle variables and age of the participants at time of interview. We concluded that there remains ethnic diversity, embedded in cultural behaviours and practices concerning health and obesity, hypertension and associated lifestyle patterns. Such practices, rooted in the belief system of an ethnic group is likely to inform the health condition of group members.

scholarly journals Relationships Between Emotional Intelligence, Mental Skills and Techniques: A Research on Professional Athletes

2021 ◽  
Vol 15 (6) ◽  
pp. 2167-2174
Author(s):  
Temel Çakiroğlu
Keyword(s):  
Emotional Intelligence ◽  
Personal Information ◽  
Pearson Correlation ◽  
Linear Regression Analysis ◽  
Professional Sports ◽  
Multiple Linear Regression Analysis ◽  
Mental Skills ◽  
Mental Training ◽  
Significant Difference ◽  
Emotional Intelligence Inventory

The purpose of this research is to examine the relationships between the levels of mental skills and techniques of university students, who continue their sports life as licensed in different sports branches, and the emotional intelligence in sports. A total of 169 athletes, 91 male (53.8%) (Mage=25.36±6.06) and 78 female (46.2%) (Mage=23.03±4.98), who continue their professional sports life in different sports branches, voluntarily participated in the research. The research was designed in relational screening model. Personal Information Form, Mental Training Inventory in Sport, and Emotional Intelligence Inventory in Sport, which were created by the researchers, were used as data collection tools within the scope of the research. In the analysis of the data, firstly, the skewness and kurtosis values were checked for the normality assumptions and it was determined that the distribution was normal. In this direction, t-test was used to compare two independent groups, Pearson correlation analysis was used to determine the relationships between the variables, and multiple linear regression analysis was used to determine the power of the independent variables in predicting the dependent variable. When the findings obtained within the scope of the research were examined, it was determined that the emotional intelligence sub-dimensions significantly predicted the components of mental training skills and techniques. In this context, a result was obtained that as the level of emotional intelligence increases, the levels of mental training skills and techniques will also increase. However, when the analyzes for demographic variables were examined within the scope of the research, it was determined that there was a significant difference within the groups. As a result, it is recommended to include programs on emotional intelligence and mental training skills and techniques in the training of athletes in order to achieve the optimal range of sportive performance. Keywords: Emotional Intelligence, Mental Training, Sports

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