linear regression modeling
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Author(s):  
Magdalena Celuch ◽  
Atte Oksanen ◽  
Pekka Räsänen ◽  
Matthew Costello ◽  
Catherine Blaya ◽  
...  

The Internet, specifically social media, is among the most common settings where young people encounter hate speech. Understanding their attitudes toward the phenomenon is crucial for combatting it because acceptance of such content could contribute to furthering the spread of hate speech as well as ideology contamination. The present study, theoretically grounded in the General Aggression Model (GAM), investigates factors associated with online hate acceptance among young adults. We collected survey data from participants aged 18–26 from six countries: Finland (n = 483), France (n = 907), Poland (n = 738), Spain (n = 739), the United Kingdom (n = 959), and the United States (n = 1052). Results based on linear regression modeling showed that acceptance of online hate was strongly associated with acceptance of violence in all samples. In addition, participants who admitted to producing online hate reported higher levels of acceptance of it. Moreover, association with social dominance orientation was found in most of the samples. Other sample-specific significant factors included participants’ experiences with the Internet and online hate, as well as empathy and institutional trust levels. Significant differences in online hate acceptance levels and the strength of its connections to individual factors were found between the countries. These results provide important insights into the phenomenon, demonstrating that online hate acceptance is part of a larger belief system and is influenced by cultural background, and, therefore, it cannot be analyzed or combatted in isolation from these factors.


2021 ◽  
Vol 9 (2) ◽  
pp. 14-31
Author(s):  
Ján Dvorský ◽  
Martin Čepel ◽  
Anna Kotásková ◽  
Katarína Bugánová

The article aims to identify, analyze, and quantify disparities in the impact of entrepreneurial risks on the future of small and medium-sized enterprises in the business environment of the Czech Republic in light of the COVID-19 pandemic. The research was carried out on 814 SMEs in two phases. 454 SMEs participated in the first phase of the research, which took part before the COVID-19 pandemic. 360 SMEs took part in the second research phase during the pandemic. Statistical methods such as correlation analysis and linear regression modeling were applied to evaluate statistical hypotheses. The results yielded interesting findings. According to respondents, the three most significant business risks in the SME segment include market, financial, and personnel risk in the period before the COVID-19 pandemic and during the COVID-19 pandemic. Prior to the COVID-19 pandemic, entrepreneurs saw the adequacy of sales and financial performance of the business as key determinants that impact the future of SMEs over a 5-year horizon. Conversely, during the COVID-19 pandemic, entrepreneurs perceived the management of the company's personnel performance, financial performance, and ability to manage financial risk as determinants that affect the future of SMEs over five years. According to owners and top managers during the COVID-19 pandemic, the most significant factor is the adequacy of personnel risk in SMEs.On the one hand, the findings benefit the owners themselves and the top managers of SMEs. On the other hand, government institutions and organizations that decide on government measures promote a penetrating environment. Also, the non-profit sector (e.g. Association of Small and Medium-Sized Enterprises and Crafts of the Czech Republic) assists SMEs in their edible activities and activities. 


2021 ◽  
pp. 1-7
Author(s):  
Brian J. Park ◽  
Colin J. Gold ◽  
Royce W. Woodroffe ◽  
Satoshi Yamaguchi

OBJECTIVE The ability to utilize the T1 slope is often limited by poor visibility on cervical radiographs. The C7 slope has been proposed as a reliable substitute but may have similar limitations of visibility. Herein, the authors propose a novel method that takes advantage of the superior visibility on CT to accurately substitute for the radiographic T1 slope and compare the accuracy of this method with previously reported substitutes. METHODS Lateral neutral standing cervical radiographs and cervical CT scans were examined. When the T1 slope was clearly visible on radiographs, the C3–7 slopes and T1 slope were measured. In CT method 1, a direct method, the T1 slope was measured from the upper endplate of T1 to the bottom edge of the CT image, assuming the edge was parallel to the horizontal plane. In CT method 2, an overlaying method, the T1 slope was calculated by superimposing the C7 slope angle measured on a radiograph onto the CT scan and measuring the angle formed by the upper endplate of T1 and the superimposed horizontal line of the C7 slope. A Pearson correlation with linear regression modeling was performed for potential substitutes for the actual T1 slope. RESULTS Among 160 patients with available noninstrumented lateral neutral cervical radiographs, the T1 slope was visible in only 54 patients (33.8%). A total of 52 patients met the inclusion criteria for final analysis. The Pearson correlation coefficients between the T1 slope and the C3–7 slopes, CT method 1, and CT method 2 were 0.243 (p = 0.083), 0.292 (p = 0.035), 0.609 (p < 0.001), 0.806 (p < 0.001), 0.898 (p < 0.001), 0.426 (p = 0.002), and 0.942 (p < 0.001), respectively. Linear regression modeling showed R2 = 0.807 for the correlation between C7 slope and T1 slope and R2 = 0.888 for the correlation between T1 slope with the CT method 2 and actual T1 slope. CONCLUSIONS The C7 slope can be a reliable predictor of the T1 slope and is more accurate than more rostral cervical slopes. However, this study disclosed that the novel CT method 2, an overlaying method, was the most reliable estimate of true T1 slope with a greater positive correlation than C7 slope. When CT studies are available in patients with an invisible T1 slope on cervical radiographs, CT method 2 should be used as a substitute for the T1 slope.


Author(s):  
Andrew W Kraft ◽  
Amine Awad ◽  
Joseph A Rosenthal ◽  
Adam A Dmytriw ◽  
Justin E Vranic ◽  
...  

Introduction : The utility of intravenous thrombolysis (IVT) prior to mechanical thrombectomy (MT) in large vessel occlusion (LVO) stroke is controversial. Some data suggest IVT could increase MT difficulty. Within our hub‐and‐spoke telestroke network, we examined how spoke‐administered IVT affects hub MT procedure time and number of passes. Methods : Patients presenting to 25 spoke hospitals who were transferred to the hub and underwent MT from 2018 to 2020 were identified from a prospectively maintained database. Procedure time, fluoroscopy time, and number of passes were obtained from operative reports. Statistics were performed using permutation resampling and linear regression in R. Results : Of 113 patients, 50 received IVT. Baseline characteristics and NIHSS were similar between groups, however the last known well‐to‐groin puncture time was shorter among IVT patients (4.4 ±1.8 hrs vs. 10.5 ±5.7 hrs, p<0.001). In patients that received IVT, mean MT procedure time was decreased by 19 minutes (50 ±29 mins vs. 69 ±47, p = 0.01) and mean fluoroscopy time was decreased by 12 minutes (21 ±16 mins vs. 33 ±31 mins, p = 0.02). Linear regression modeling showed IVT was associated with improved procedure time and fluoroscopy time even when controlling for last known well (p = 0.02 and p = 0.02, respectively). For patients that achieved TICI2b‐3 reperfusion, there was a trend for reduced groin puncture‐to‐reperfusion time by 13 minutes in IVT patients (30 ±22 mins vs. 43 ±49 mins, p = 0.07). IVT‐treated patients required less MT passes (median 1 pass [IQR 1.0, 1.80] vs. 2 passes [1.0, 2.3], p<0.001), and the proportion of IVT patients requiring 2 or few passes was significantly higher (91.6% vs 59.3%, p = 0.01). Moreover, IVT was associated with decreased number of passes even when controlling for last known well (p = 0.01). For patients that received IVT, there was a trend for improved TICI2b‐3 reperfusion at the end of MT (93.9% vs. 83.8%, p = 0.06). IVT did not result in increased intracranial hemorrhage (IVT = 10% vs. 18%, p = 0.17). Conclusions : Within our network, hub MT following spoke‐administered IVT was faster and required fewer passes, even when controlling for last known well. Furthermore, IVT did not result in worsened reperfusion following MT. This retrospective analysis suggests IVT does not impair MT, but instead may enhance it.


2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jia Cong ◽  
Zubair Ahmad ◽  
Basim S.O. Alsaedi ◽  
Osama Abdulaziz Alamri ◽  
Ibrahim Alkhairy ◽  
...  

Marketing refers to the strategies a company undertakes to promote its brands to its potential audience. Advertising provides useful venues for marketing to promote a company’s survives/goods to the audience. It has a positive impact on the sale of services or products. In this study, we consider a well-known online medium called Twitter (the fourth most popular social media platform used by marketers) to check its impact on sales. For this purpose, the simple linear regression modeling approach is implemented to test the significance and usefulness of Twitter advertising on sale. Statistical tests such as t-test and correlation test are adopted to test the hypothesis of the “impact of Twitter advertising on sales.” Based on the findings of this study, it is observed that Twitter advertising has a positive impact on sales. Furthermore, a new statistical model called the exponential T-X exponentiated exponential is introduced. The proposed model is very interesting and possesses heavy-tailed characteristics which are useful in finance and other related sectors. Finally, the applicability of the new model is illustrated by considering the sales data.


Langmuir ◽  
2021 ◽  
Author(s):  
Talha Razaulla ◽  
Michael Bekeris ◽  
Haidong Feng ◽  
Michael Beeman ◽  
Ugochukwu Nze ◽  
...  

2021 ◽  
Vol 883 (1) ◽  
pp. 012089
Author(s):  
La Ega ◽  
Muspida ◽  
E Kembauw ◽  
S J Ferdinandus ◽  
L J Sinay ◽  
...  

Abstract This study entitled “The Effect of Agricultural Diversification on Community Income in the East Taniwel District”. The research objective was to determine the relationship and influence of agricultural diversification on people's income in the East Taniwel District. The data used in this study are primary data from eight villages in East Taniwel District, West Seram District, Maluku Province. This data is the result of a baseline survey at the household level, where the sample is determined using the Slovin formula. The data analysis technique used is the application of the backward method in multiple linear regression modeling based on OLS. The results showed that there was a relationship and influence between agricultural diversification and the income of rural communities in East Taniwel District.


2021 ◽  
Vol 2 ◽  
Author(s):  
Emily M. Leishman ◽  
Nienke van Staaveren ◽  
Vern R. Osborne ◽  
Benjamin J. Wood ◽  
Christine F. Baes ◽  
...  

Footpad dermatitis (FPD) can be a prevalent issue in commercial turkey production. This study aimed to identify the bird, housing, and management-related factors associated with the prevalence of FPD in the Canadian turkey flocks. A questionnaire and flock health scoring system were developed and disseminated to ~500 commercial turkey farmers across Canada. Farmers were asked to score FPD on a subset of 30 birds within their flock using a 0–2 scoring scale based on severity. The prevalence of FPD in the flock was calculated as the percentage of affected birds (score 1 or 2). A multivariate linear regression modeling was used to identify the factors associated with the prevalence of FPD. Four variables were included in the final model and accounted for 26.7% of the variation in FPD prevalence among the flocks. FPD prevalence was higher with increasing bird weight (3.6 ± 1.13), higher in flocks bedded with straw (12.1 ± 7.9), higher in flocks where birds were picked up less frequently during daily inspections (11.6 ± 8.10), and higher in flocks that used feed/water additives to reduce litter moisture (20.5 ± 10.59). These findings are a preliminary exploratory assessment of risk factors related to FPD prevalence on Canadian turkey farms. While these findings emphasize the importance of litter management and the stockperson, estimates and P-values from this study should be interpreted with caution. Further, longitudinal studies with the identified variables are required to better determine their influence on FPD.


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