scholarly journals Combining Multiple Organizational-level Databases: An Empirical Evaluation of Different Matching Methods

2021 ◽  
pp. 004912412098618
Author(s):  
Tim de Leeuw ◽  
Steffen Keijl
Keyword(s):  
Empirical Evaluation ◽  
Organizational Level ◽  
Random Errors ◽  
Data Set ◽  
Future Studies ◽  
Matching Methods ◽  
Matching Process ◽  
Significant Relationships ◽  
Research Findings ◽  
Insight Into

Although multiple organizational-level databases are frequently combined into one data set, there is no overview of the matching methods (MMs) that are utilized because the vast majority of studies does not report how this was done. Furthermore, it is unclear what the differences are between the utilized methods, and it is unclear whether research findings might be influenced by the utilized method. This article describes four commonly used methods for matching databases and potential issues. An empirical comparison of those methods used to combine regularly used organizational-level databases reveals large differences in the number of observations obtained. Furthermore, empirical analyses of these different methods reveal that several of them produce both systematic and random errors. These errors can result in erroneous estimations of regression coefficients in terms of direction and/or size as well as an issue where truly significant relationships might be found to be insignificant. This shows that research findings can be influenced by the MM used, which would argue in favor of the establishment of a preferred method as well as more transparency on the utilized method in future studies. This article provides insight into the matching process and methods, suggests a preferred method, and should aid researchers, reviewers, and editors with both combining multiple databases and describing and assessing them.

scholarly journals CT-based and morphological comparison of glenoid inclination and version angles and mineralisation distribution in human body donors

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Nabil Serrano ◽  
Marc Kissling ◽  
Hannah Krafft ◽  
Karl Link ◽  
Oliver Ullrich ◽  
...  
Keyword(s):  
Elderly Population ◽  
Basic Research ◽  
Male Body ◽  
3D Ct ◽  
Morphological Comparison ◽  
Data Set ◽  
Future Studies ◽  
History Of ◽  
Research Findings

Abstract Background For optimal prosthetic anchoring in omarthritis surgery, a differentiated knowledge on the mineralisation distribution of the glenoid is important. However, database on the mineralisation of diseased joints and potential relations with glenoid angles is limited. Methods Shoulder specimens from ten female and nine male body donors with an average age of 81.5 years were investigated. Using 3D-CT-multiplanar reconstruction, glenoid inclination and retroversion angles were measured, and osteoarthritis signs graded. Computed Tomography-Osteoabsorptiometry (CT-OAM) is an established method to determine the subchondral bone plate mineralisation, which has been demonstrated to serve as marker for the long-term loading history of joints. Based on mineralisation distribution mappings of healthy shoulder specimens, physiological and different CT-OAM patterns were compared with glenoid angles. Results Osteoarthritis grades were 0-I in 52.6% of the 3D-CT-scans, grades II-III in 34.3%, and grade IV in 13.2%, with in females twice as frequently (45%) higher grades (III, IV) than in males (22%, III). The average inclination angle was 8.4°. In glenoids with inclination ≤10°, mineralisation was predominantly centrally distributed and tended to shift more cranially when the inclination raised to > 10°. The average retroversion angle was − 5.2°. A dorsally enhanced mineralisation distribution was found in glenoids with versions from − 15.9° to + 1.7°. A predominantly centrally distributed mineralisation was accompanied by a narrower range of retroversion angles between − 10° to − 0.4°. Conclusions This study is one of the first to combine CT-based analyses of glenoid angles and mineralisation distribution in an elderly population. The data set is limited to 19 individuals, however, indicates that superior inclination between 0° and 10°-15°, and dorsal version ranging between − 9° to − 3° may be predominantly associated with anterior and central mineralisation patterns previously classified as physiological for the shoulder joint. The current basic research findings may serve as basic data set for future studies addressing the glenoid geometry for treatment planning in omarthritis.

The effect of formula t-shirt method for scientists taught in science lessons in secondary schools on academic success

2020 ◽  
Vol 8 (S3) ◽  
pp. 1-10
Author(s):  
Burhan Karasu ◽  
Keyword(s):  
Academic Success ◽  
Secondary School ◽  
Item Analysis ◽  
Achievement Test ◽  
Test Results ◽  
Future Studies ◽  
Learning Techniques ◽  
Post Test ◽  
Research Findings ◽  
Experimental Group

The aim of this research is to investigate whether there is a meaningful difference in the academic success, between the students who are applied the "formula t-shirt method" (experimental group) and the students who are not (in other classes of the school), in the education for the scientists wanted to be taught in the secondary school 5th, 6th and 7th grade science textbooks. Semi-experimental method was used as research method. In the 6th grade, 27 students participated in this study as experimental group (students wearing t-shirts) and 49 students in the other classes of the school that did not participate in the study. Academic achievement test including pre-test and post-test, informative observations, students’ and teacher’s interviews as well as 20 printed t-shirts were used to collect data. The pilot study of the developed achievement test was applied in another school and also the item analysis of it was performed. According to the research findings, when the experimental group’s success post-test results from the application performed, were examined in line with the interviews, significant differences were observed. It was seen that the subjects aimed to be gained with the formula t-shirt method, were adopted by the students and also increased their success. Looking at the results of the research, thanks to wearing the t-shirts prepared by using the human body on the background, and the reconciliation of the students wearing with the scientists on t-shirts, the desired learning was provided. This also contributed to such learning techniques as peer learning, active learning, social learning in terms of visuality and integrity. It is thought that these materials developed with the formula t-shirt method, will also inspire researchers for future studies in terms of their usability in other fields and subjects

scholarly journals Methods for estimating uncertainty in factor analytic solutions

2014 ◽  
Vol 7 (3) ◽  
pp. 781-797 ◽  
Author(s):  
P. Paatero ◽  
S. Eberly ◽  
S. G. Brown ◽  
G. A. Norris
Keyword(s):  
Environmental Protection Agency ◽  
Synthetic Data ◽  
Analytic Solutions ◽  
Data Sets ◽  
Random Errors ◽  
Data Set ◽  
Factor Analytic ◽  
Uncertainty Estimates ◽  
Multilinear Engine ◽  
Analytic Models

Abstract. The EPA PMF (Environmental Protection Agency positive matrix factorization) version 5.0 and the underlying multilinear engine-executable ME-2 contain three methods for estimating uncertainty in factor analytic models: classical bootstrap (BS), displacement of factor elements (DISP), and bootstrap enhanced by displacement of factor elements (BS-DISP). The goal of these methods is to capture the uncertainty of PMF analyses due to random errors and rotational ambiguity. It is shown that the three methods complement each other: depending on characteristics of the data set, one method may provide better results than the other two. Results are presented using synthetic data sets, including interpretation of diagnostics, and recommendations are given for parameters to report when documenting uncertainty estimates from EPA PMF or ME-2 applications.

scholarly journals Were VCF patients at higher risk of mortality following the 2009 publication of the vertebroplasty “sham” trials?

2017 ◽  
Vol 29 (2) ◽  
pp. 375-383 ◽  
Author(s):  
K. L. Ong ◽  
D. P. Beall ◽  
M. Frohbergh ◽  
E. Lau ◽  
J. A. Hirsch
Keyword(s):  
Mortality Risk ◽  
Cox Regression ◽  
Compression Fracture ◽  
Balloon Kyphoplasty ◽  
Data Set ◽  
Mortality Risks ◽  
Medicare Data ◽  
Kaplan Meier ◽  
Risk Of Mortality ◽  
Insight Into

Abstract Summary The 5-year period following 2009 saw a steep reduction in vertebral augmentation volume and was associated with elevated mortality risk in vertebral compression fracture (VCF) patients. The risk of mortality following a VCF diagnosis was 85.1% at 10 years and was found to be lower for balloon kyphoplasty (BKP) and vertebroplasty (VP) patients. Introduction BKP and VP are associated with lower mortality risks than non-surgical management (NSM) of VCF. VP versus sham trials published in 2009 sparked controversy over its effectiveness, leading to diminished referral volumes. We hypothesized that lower BKP/VP utilization would lead to a greater mortality risk for VCF patients. Methods BKP/VP utilization was evaluated for VCF patients in the 100% US Medicare data set (2005–2014). Survival and morbidity were analyzed by the Kaplan-Meier method and compared between NSM, BKP, and VP using Cox regression with adjustment by propensity score and various factors. Results The cohort included 261,756 BKP (12.6%) and 117,232 VP (5.6%) patients, comprising 20% of the VCF patient population in 2005, peaking at 24% in 2007–2008, and declining to 14% in 2014. The propensity-adjusted mortality risk for VCF patients was 4% (95% CI, 3–4%; p < 0.001) greater in 2010–2014 versus 2005–2009. The 10-year risk of mortality for the overall cohort was 85.1%. BKP and VP cohorts had a 19% (95% CI, 19–19%; p < 0.001) and 7% (95% CI, 7–8%; p < 0.001) lower propensity-adjusted 10-year mortality risk than the NSM cohort, respectively. The BKP cohort had a 13% (95% CI, 12–13%; p < 0.001) lower propensity-adjusted 10-year mortality risk than the VP cohort. Conclusions Changes in treatment patterns following the 2009 VP publications led to fewer augmentation procedures. In turn, the 5-year period following 2009 was associated with elevated mortality risk in VCF patients. This provides insight into the implications of treatment pattern changes and associated mortality risks.

How to foster employee satisfaction by means of coaching, motivation, emotional salary and social media skills in the agri-food value chain

New Medit ◽  
2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Keyword(s):  
Social Media ◽  
Value Chain ◽  
Employee Satisfaction ◽  
Data Set ◽  
Business Skills ◽  
A Value ◽  
The Social ◽  
Use Of Social Media ◽  
Food Value ◽  
Insight Into

Most employee satisfaction studies do not consider the current digital transformation of the social world. The aim of this research is to provide insight into employee satisfaction in agribusiness by means of coaching, motivation, emotional salary and social media with a value chain methodology. The model is tested empirically by analysing a survey data set of 381 observations in Spanish agribusiness firms of the agri-food value chain. The results show flexible remunerations of emotional salary are determinants of employee satisfaction. Additionally, motivation is relevant in the production within commercialisation link and coaching in the production within transformation link. Whole-of-chain employees showed the greatest satisfaction with the use of social media in personnel management. Findings also confirmed that employees will stay when a job is satisfying. This study contributes to the literature by investigating the effect of current social and digital business skills on employee satisfaction in the agri-food value chain.

Empirical Evaluation of Genetic Clustering Methods Using Multilocus Genotypes From 20 Chicken Breeds

Genetics ◽  
2001 ◽  
Vol 159 (2) ◽  
pp. 699-713
Author(s):  
Noah A Rosenberg ◽  
Terry Burke ◽  
Kari Elo ◽  
Marcus W Feldman ◽  
Paul J Freidlin ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Population Structure ◽  
Clustering Algorithm ◽  
Empirical Evaluation ◽  
Unknown Origin ◽  
Clustering Methods ◽  
Genetic Cluster ◽  
Data Set ◽  
Multilocus Genotypes ◽  
Chicken Breeds

Abstract We tested the utility of genetic cluster analysis in ascertaining population structure of a large data set for which population structure was previously known. Each of 600 individuals representing 20 distinct chicken breeds was genotyped for 27 microsatellite loci, and individual multilocus genotypes were used to infer genetic clusters. Individuals from each breed were inferred to belong mostly to the same cluster. The clustering success rate, measuring the fraction of individuals that were properly inferred to belong to their correct breeds, was consistently ~98%. When markers of highest expected heterozygosity were used, genotypes that included at least 8–10 highly variable markers from among the 27 markers genotyped also achieved &gt;95% clustering success. When 12–15 highly variable markers and only 15–20 of the 30 individuals per breed were used, clustering success was at least 90%. We suggest that in species for which population structure is of interest, databases of multilocus genotypes at highly variable markers should be compiled. These genotypes could then be used as training samples for genetic cluster analysis and to facilitate assignments of individuals of unknown origin to populations. The clustering algorithm has potential applications in defining the within-species genetic units that are useful in problems of conservation.

scholarly journals TARGETED ADVERTISING IN THE BREAKFAST CEREAL INDUSTRY

2017 ◽  
Vol 49 (3) ◽  
pp. 382-399 ◽  
Author(s):  
JOSHUA BERNING ◽  
ADAM N. RABINOWITZ
Keyword(s):  
Product Differentiation ◽  
Food Product ◽  
Television Advertising ◽  
Breakfast Cereal ◽  
Data Set ◽  
Policy Makers ◽  
Relationship Of ◽  
Cereal Industry ◽  
The Relationship ◽  
Insight Into

AbstractWe examine the relationship of product characteristics of ready-to-eat breakfast cereal and targeted television advertising to specific consumer segments. We compile a unique data set that includes brand-packaging characteristics, including on-box games, nutrition information, and cobranding. We find that the relationship of television advertising and a cereal's brand-packaging characteristics varies by target audience. Our results provide insight into understanding how manufacturers strategically utilize branding, packaging, and television advertising. This can help industry and policy makers develop food product advertising policy. This analysis extends to other product markets where extensive product differentiation and promotion are present as well.

Budaya Organisasi dan Komitmen Guru Dalam Pelaksanaan Pengurusan Kualiti Menyeluruh di Sekolah–sekolah Menengah Zon Bukit Mertajam

2012 ◽  
Author(s):  
Keow Ngang Tang ◽  
Abdul Ghani Kanesan Abdullah
Keyword(s):  
Organizational Culture ◽  
Quality Management ◽  
Secondary Schools ◽  
Total Quality Management ◽  
Simple Random Sampling ◽  
Total Quality ◽  
Significant Relationships ◽  
Level Ii ◽  
Research Findings ◽  
High Level

Kajian ini bertujuan untuk mengkaji faktor–faktor berkaitan Pengurusan Kualiti Menyeluruh (PKM) di sekolah–sekolah menengah zon Bukit Mertajam. Faktor–faktor yang dikaji ialah budaya organisasi dan komitmen guru. Kajian yang berbentuk tinjauan korelasi ini merangkumi sejumlah 300 orang guru dari 19 buah sekolah menengah zon Bukit Mertajam yang telah dipilih dengan menggunakan kaedah persampelan rawak mudah. Satu set instrumen kajian yang terdiri daripada tiga bahagian iaitu PKM, budaya organisasi, dan komitmen guru dengan nilai alfa Cronbach masing–masing 0.881, 0.921, dan 0.852 telah digunakan dalam kajian ini. Secara deskriptifnya, dapatan kajian ini menunjukkan: (i) Kebanyakan responden iaitu 65.6 peratus mempunyai persepsi bahawa amalan PKM di sekolah mereka adalah pada tahap yang sederhana manakala persepsi 30.4 peratus responden berada pada tahap tinggi; (ii) Sebanyak 67.3 peratus responden mempunyai persepsi bahawa budaya organisasi mereka berada pada tahap yang sederhana positif; (iii) Kesemua responden berkomitmen sederhana dan tinggi. Di samping itu, penganalisisan data menunjukkan terdapat hubungan yang positif dan signifikan antara budaya organisasi (r = 0.725) dan komitmen guru (r = 0.901) dengan tahap PKM pada aras signifikan 0.01. Hasil kajian daripada analisis regresi pelbagai kaedah ‘Forward’ pula menunjukkan budaya organisasi dan komitmen guru merupakan peramal yang telah berjaya menyumbang sebanyak 81.7 peratus dalam pelaksanaan PKM ini. Kata kunci: Pengurusan kualiti menyeluruh, budaya organisasi, komitmen guru The aim of this research was to study factors associated with Total Quality Management (TQM) in secondary schools Bukit Mertajam zone. Factors that were studied are organizational culture and teachers’ commitment. This descriptive correlational survey research involved a total of 300 teachers from 19 secondary schools in Bukit Mertajam zone that were selected using the simple random sampling method. A set of research instrument comprising of the three section, namely TQM, organizational culture and teachers’ commitment with Cronbach Alpha value 0.881, 0.921 and 0.852 respectively has been used in this research. In descriptive terms, the research findings showed that: (i) Most of the respondents, 65.6 percent perceived the practice of TQM in their schools was at the moderate level while 30.4 percent respondents perceived the practice of TQM was at the high level; (ii) A total of 67.3 percent respondents perceived their organizational culture as moderate positive level; (iii) All respondents were at the moderate and high commitment. In addition, the data analysis showed that there were positive and significant relationships between the organizational culture (r = 0.725) and teachers’ commitment (r = 0.901) with the level of TQM at significent level = 0.01. Findings of the “Forward” method of multiple regression showed that organizational culture and teachers’ commitment were the predictors in which have successfully contributed 81.7 percent to the practice of TQM. Key words: Total Quality Management, organizational culture, teachers’ commitment

The systematics of Raspailiidae (Demospongiae: Poecilosclerida: Microcionina) re-analysed with a ribosomal marker

2007 ◽  
Vol 87 (6) ◽  
pp. 1571-1576 ◽  
Author(s):  
Dirk Erpenbeck ◽  
Sue List-Armitage ◽  
Belinda Alvarez ◽  
Bernard M. Degnan ◽  
Gert Wörheide ◽  
...  
Keyword(s):  
Gene Tree ◽  
Morphological Characters ◽  
Character Evolution ◽  
28S Rdna ◽  
The Other ◽  
Data Set ◽  
Rdna Gene ◽  
Insight Into

We present a 28S rDNA gene tree of selected Raspailiidae, Axinellidae and other demosponges to obtain insight into raspailiid phylogeny and character evolution. The Raspailiidae in our data set cluster in a well-supported clade, distinguished from Axinellidae, Agelasida and Hadromerida. Raspailia (s.s.), Eurypon, Sollasella, Aulospongus and Ectyoplasia form a Raspailiidae clade. Some Raspailia subgenera, in particular R. (Parasyringella), are not retrieved monophyletically. Trikentrion falls into the Thrinacophorinae, and not the Cyamoninae as earlier hypothesized. The axinellid genera Ptilocaulis and Reniochalina also cluster with Raspailiidae, distant from the other Axinellidae. The suitability of particular morphological characters for raspailiid phylogeny is discussed.

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