scholarly journals Effect of Polymerization Time and Home Bleaching Agent on the Microhardness and Surface Roughness of Bulk-Fill Composites: A Scanning Electron Microscopy Study

Scanning ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Zümrüt Ceren Özduman ◽  
Magrur Kazak ◽  
Mehmet Ali Fildisi ◽  
Rümeysa Hatice Özlen ◽  
Evrim Dalkilic ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Rank Test ◽  
Bleaching Agent ◽  
Polymerization Time ◽  
Before And After ◽  
Signed Rank Test ◽  
Bonferroni Test ◽  
Fill Materials

Objective. The aim of this study is to evaluate the microhardness and surface roughness of two different bulk-fill composites polymerized with light-curing unit (LCU) with different polymerization times before and after the application of a home bleaching agent.Materials-Methods. For both microhardness and surface roughness tests, 6 groups were prepared with bulk-fill materials (SonicFill, Filtek Bulk Fill) according to different polymerization times (10, 20, and 30 s). 102 specimens were prepared using Teflon molds (4 mm depth and 5 mm diameter) and polymerized with LCU. 30 specimens (n=5) were assessed for microhardness. Before home bleaching agent application, the bottom/top (B/T) microhardness ratio was evaluated. After bleaching agent application, the microhardness measurements were performed on top surfaces. Roughness measurements were performed in 72 specimens (n=12) before and after bleaching application. Additionally, for SEM analyses, two specimens from all tested groups were prepared before and after bleaching agent application. The data B/T microhardness ratio before bleaching was analyzed by two-way ANOVA and Tukey’s HSD test. The data from the top surface of specimens’ microhardness before and after bleaching were analyzed using Wilcoxon signed-rank test, Kruskal-Wallis, Mann-WhitneyUtests. The data from surface roughness tests were statistically analyzed by multivariate analysis of variance and Bonferroni test (p<0.05).Results. The B/T microhardness ratio results revealed no significant differences between groups (p>0.05). Comparing the microhardness values of the composites’ top surfaces before and after bleaching, a significant decrease was observed exclusively in FB30s (p<0.05). No significant differences in surface roughness values were observed when the groups were compared based on bulk-fill materials (p>0.05) while the polymerization time affected the surface roughness of the SF20s and SF30s groups (p<0.05). After bleaching, surface roughness values were significantly increased in the SF20s and SF30s groups (p<0.05).Conclusion. The clinicians should adhere to the polymerization time recommended by the manufacturer to ensure the durability of the composite material in the oral environment.

scholarly journals Enamel Surface Roughness after Lingual Bracket Debonding: An In Vitro Study

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4196
Author(s):  
Martina Eichenberger ◽  
Anna Iliadi ◽  
Despina Koletsi ◽  
George Eliades ◽  
Carlalberta Verna ◽  
...  
Keyword(s):  
Surface Roughness ◽  
In Vitro Study ◽  
Rank Test ◽  
Roughness Parameters ◽  
Signed Rank ◽  
Fine Diamond ◽  
Before And After ◽  
Signed Rank Test ◽  
Lingual Brackets

The aim of the present study was to quantitatively assess changes in enamel roughness parameters before and after lingual bracket debonding. The lingual surface of 25 sound premolars extracted for orthodontic reasons was studied by 3D optical interferometric profilometry before and after debonding of lingual brackets following enamel finishing (with fine diamond) and polishing (with 12- and 20-fluted carbide burs). The roughness parameters tested were the amplitude parameters Sa and Sz, the hybrid parameter Sdr, and the functional parameters Sc and Sv. The parameter differences (after debonding-reference) were calculated, and statistical analysis was performed via a Wilcoxon signed-rank test. Statistically significantly higher values were observed in all the surface roughness parameters of enamel surfaces after finishing and polishing, with the mostly affected parameter being the Sdr. Under the conditions of the present study, the finishing and polishing instruments used after debonding of lingual noncustomized brackets created a surface texture rougher than the control in all the tested roughness parameters.

PERBEDAAN FINANCIAL PERFORMANCE PASCA SECONDARY OFFERINGS

Wahana ◽  
2019 ◽  
Vol 22 (1) ◽  
pp. 41-49
Author(s):  
Djaja Perdana ◽  
Herbowo Herbowo
Keyword(s):  
Financial Performance ◽  
Stock Exchange ◽  
Hypothesis Test ◽  
Poor Performance ◽  
Rank Test ◽  
Growth Ratio ◽  
Significant Difference ◽  
Before And After ◽  
Signed Rank Test ◽  
Asset Turnover

This study aims to examine the differences in corporate financial performance before and after secondary offerings. The financial performance is proxied by WCR, DER, Solvency, ROA, ROE, Asset Turnover (ATO) and Growth ratio which representing the value of liquidity, financing, activity, performance and growth of the firm. The study involved 67 samples of the companies listed on the Indonesia Stock Exchange conducting secondary offerings during 2008-2013 period and selected through purposive random sampling method and using Financial Statement data from 2005-2016 period. Hypothesis test is performed using Wilcoxon Signed Rank test. The results of this study indicate that there is no significant difference in the ratio of Solvency, ROA and ROE between before and after secondary offerings, but there are significant differences in the ratio of WCR, DER, Asset Turnover and Growth. WCR ratio after secondary offerings increased, while DER ratio after secondary offerings decreased, the condition of both ratios showed better performance. While the indication of poor performance seen in decreasing asset turnover ratio and growth ratio.Keywords : agency theory, financial performance, secondary offerings

The Degree of Subjective Complaints of Students Practice in Mechanical Technology Laboratories

2018 ◽  
Vol 4 (1) ◽  
pp. 22
Author(s):  
I Ketut Widana
Keyword(s):  
Engineering Students ◽  
Standing Position ◽  
Statistical Test ◽  
Rank Test ◽  
Cross Sectional ◽  
Signed Rank ◽  
Before And After ◽  
Signed Rank Test ◽  
The Difference ◽  
Paired T Test

The working practice of the engineering students is part of the learning process that is irreducible and indispensable. The composition of  lecturing between theoretical and practical one is 40% to 60%. With this condition, the students spend more time at the laboratory. Generally, the students perform in the laboratory work by standing position. The design of research is observational cross-sectional. The method applied is observation, interview and measuring. The subjects of research are practicing students amounting to 21 students. Referring to the analysis of statistical test or Wilcoxon signed ranks test, the difference of effect of work position is significant, namely p < 0.05 towards musculoskeletal disorders (MSDs) before and after working. The quantity of the average complaint after working is score 44.62 ± 9.47. The result of Wilcoxon signed rank test shows that there is significant different effects of standing work position, namely p < 0.05 towards fatigue generally before and after working. The degree of the working pulse is on the average of 110.78  ± 17.80 bpm (beats per minutes) which can be categorized into the medium workload. Using paired t-test, the result is p < 0.05.

The potential role of an activity-based guitar program on the anxiety and fulfillment levels of younger relatives of cancer patients: A pilot study

2021 ◽  
pp. 025576142110273
Author(s):  
Erkan Sülün ◽  
Hüseyin Olgaçer ◽  
Hakkı Cengiz Eren
Keyword(s):  
Cancer Patients ◽  
Trait Anxiety ◽  
Potential Role ◽  
Rank Test ◽  
Satisfaction Scale ◽  
Before And After ◽  
Signed Rank Test ◽  
Total State ◽  
Rank Differences

In this study, the authors evaluated the potential role of an activity-based guitar training program on reducing anxiety and providing fulfillment for younger relatives of cancer patients. Ten active members of KHYD (The Society for Relatives of Cancer Patients), between ages 11 and 17 participated in an 8-week guitar education program. The participants filled out two questionnaires before and after their engagement in the 8-week program, one to measure changes in their anxiety levels (State-Trait Anxiety Inventory) and the other to measure changes in their general fulfillment levels (Multidimensional Students’ Life Satisfaction Scale). Wilcoxon signed rank test, as well as descriptive statistics were used in the analysis of data. Mean rank differences were observed to be statistically significant with respect to total state and trait anxiety scores; in both cases, the participants’ scores decreased after their engagement in the program. Statistically significant mean rank differences were also observed in the overall MSLSS scores and its “friends” and “environment” sub-dimensions; with respect to these, participants’ scores increased after their engagement in the program. Recommendations for more comprehensive, larger-scale studies are given at the end.

PERBANDINGAN KADAR ENZIM KREATININ FOSFOKINASE DAN NYERI OTOT SEBELUM DAN SESUDAH LATIHAN BERENANG SELAMA EMPAT MINGGU PADA PERENANG UNIT KEGIATAN MAHASISWA KLUB RENANG

2020 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Nur Akmal Binti A'ffan ◽  
Reni Farenia ◽  
Delita Prihatni
Keyword(s):  
Muscle Soreness ◽  
Creatine Phosphokinase ◽  
Rank Test ◽  
Healthy Male ◽  
Blood Draw ◽  
Normality Test ◽  
Signed Rank ◽  
Before And After ◽  
Signed Rank Test ◽  
Enzyme Elevation

A research has been done to compare the differences on the enzyme creatine phosphokinase (CPK) level and muscle soreness before and after 4-weeks swim practices on swimmers of College swimming club. Eighteen healthy male swimmers (mean ± SD; age: 19,94 ± 1,86 years; weight: 65,28 ± 6,14 kg; height: 1,72 ± 0,43 m) participated in this study. All subjects performed their 4-weeks swim practices which consist of 2x120 hours per week with 500 meters average daily swim distance and weight training. Blood was collected before and after the practices and CPK were analyzed. Questionnaires concerning muscle soreness were filled put before each blood draw. Results were analyzed using normality test and Wilcoxon signed rank test (p<0.05). There was significant increase in CPK level during 4-weeks swim practices by 59.41% (p=0.044). Whereas for muscle soreness (overall and specifically in arms and thighs), there was no significant differences between before and after the 4-weeks swim practices. As a conclusion, participation in 4-weeks swim practices resulted in significant serum CPK enzyme elevation, but there was lack of significance in muscle soreness differences on swimmers of College swimming club.

Frenotomy in Infants with Tongue-Tie and Breastfeeding Problems

2018 ◽  
Vol 35 (4) ◽  
pp. 706-712 ◽  
Author(s):  
Anjana Srinivasan ◽  
Alex Al Khoury ◽  
Svetlana Puzhko ◽  
Carole Dobrich ◽  
Meira Stern ◽  
...  
Keyword(s):  
Medical Community ◽  
Rank Test ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Before And After ◽  
Signed Rank Test ◽  
Breastfeeding Counseling ◽  
The Right ◽  
Breastfeeding Problems ◽  
Numeric Rating

Background: Infant tongue-tie can cause breastfeeding problems, which may be improved by frenotomy. However, controversy exists among the medical community. Research aim: To examine the influence of frenotomy on infants with posterior ankyloglossia, by quantifying the changes in breastfeeding and maternal nipple pain using standardized tools. Methods: Newborns ( N = 30) below 12 weeks of age were recruited from the Herzl–Goldfarb Breastfeeding Clinic between April 2014 and April 2015. Diagnosis of posterior ankyloglossia was made clinically. Frenotomy was performed. Mothers received breastfeeding counseling before and after the procedure. Pain and breastfeeding were assessed before the procedure, immediately after the procedure, and after 2 days, 7 days and 14 days. Breastfeeding was assessed using the LATCH Tool and by subjective questioning. Maternal nipple pain was assessed using the Numeric Rating System. Results: No complications were reported with frenotomy. There was a significant improvement in LATCH score immediately post-frenotomy, with an increase in median scores from 7.5 to 8.5 ( p < .0001, Wilcoxon signed rank test). There was a significant decrease in median pain score immediately post-frenotomy, from 3.0 on the left nipple and 3.25 on the right nipple, to 0 bilaterally ( p < .0001, Wilcoxon signed rank test). Subjective improvement in breastfeeding was reported by 90% of mothers immediately after frenotomy and 83% of mothers at Day 14. Conclusion: Frenotomy for posterior ankyloglossia may improve breastfeeding and nipple pain.

scholarly journals Analysis of Indonesian Islamic and Conventional Banking Before and After 2008

2016 ◽  
Vol 8 (11) ◽  
pp. 193 ◽  
Author(s):  
Arfianti Novita Anwar
Keyword(s):  
Secondary Data ◽  
Rank Test ◽  
Islamic Banking ◽  
Positive Contribution ◽  
Islamic Banks ◽  
Significant Difference ◽  
Before And After ◽  
Signed Rank Test ◽  
The Law ◽  
Conventional Banks

<p>This study aims to analyze the performance of Islamic banks and conventional banks before and after the implementation of Islamic Banking Act 2008. The performance will be measured using CAMEL ratio selected. This research is considered essential in examining the positive contribution of the application of the Act to improve the performance of Islamic banks in Indonesia. By using secondary data, this study compared the performance of Islamic banks with that conventional bank selected as samples during the study period. Data were analyzed using the Wilcoxon Signed Rank Test for inter-temporal and Mann-Whitney test for inter-bank. Inter-temporal Tests conducted on Islamic Banking showed that a significant difference was only seen in the NPF ratio of 2 years before and after implementation of Islamic Banking Act. As for conventional banks showed a more diverse ie for 1 year before and after the application of the Law on Islamic Banking there are significant differences for the ROA and ROE, two years before and after implementation of the Law Islamic banking there are significant differences for the CAR, ROA, ROE and NIM and for the overall test a significant difference to CAR, ROA, ROE, NIM and efficiency. Inter-bank testing showed that prior to the application of Islamic Banking Act there are significant differences between conventional banks and Islamic banks to CAR, ROA and efficiency. Furthermore, after the application of Islamic Banking Act there is a significant difference for the CAR and LDR / FDR.</p>

scholarly journals Improving indicators of tuberculosis program cascades by leveraging HIV program strategies

2019 ◽  
Vol 9 (4) ◽  
pp. 191-195
Author(s):  
S. C. Meribe ◽  
E. Harausz ◽  
I. Lawal ◽  
A. Ogundeji ◽  
C. Mbanefo ◽  
...  
Keyword(s):  
Standard Of Care ◽  
Rank Test ◽  
Military Hospitals ◽  
Us Army ◽  
Signed Rank ◽  
Before And After ◽  
Army Medical Research ◽  
Signed Rank Test ◽  
The Impact ◽  
Number Of Individuals

Background: To improve rates of human immunodeficiency virus (HIV) case detection and treatment, the Nigerian Ministry of Defense Health Implementation Program and the US Army Medical Research Directorate-Africa/Nigeria introduced a HIV standard of care (SOC) package. Given the integration of tuberculosis (TB) and HIV programs and evolving policies, we evaluated the impact of this strategy on TB program indicators.Methods: Routine, de-identified program data from 27 Nigerian military hospitals were analyzed. Using Wilcoxon signed-rank test, bivariate analyses were performed to compare data from 12 months before and after implementation of the SOC package.Results: Our data showed improvements post-implementation as follows: the number of individuals receiving antiretroviral therapy (ART) screened for TB increased from 14 530 to 29 467 (P < 0.001); the number of individuals with presumptive TB identified increased from 803 to 1800 (P < 0.001); the number of ART clients bacteriologically tested for TB increased from 746 to 1717 (P < 0.001); and the number of ART clients treated for TB increased from 152 to 282 (P < 0.001). Newly registered or relapsed TB cases increased from 436 to 906 (P < 0.001), the number of TB cases with known HIV status increased from 437 to 837 (P < 0.001), the number of TB-HIV co-infected cases increased from 182 to 301 (P = 0.006), and the number of TB-HIV co-infected clients who started ART increased from 101 to 176 (P = 0.003).Conclusion: The implementation of the updated HIV SOC package led to the improvement in key TB diagnosis and treatment indicators. When emulated, this could help improve the performance of other TB programs in countries other than Nigeria.

scholarly journals Perbandingan Persentase Lemak Tubuh Sebelum dan Setelah Melakukan Senam Zumba pada Wanita Dewasa

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Brigitta A. Tendean ◽  
Damajanty H. C. Pangemanan ◽  
Ivonny M. Sapulete
Keyword(s):  
Body Fat ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Analysis Data ◽  
Rank Test ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Percentage Of Body Fat ◽  
Before And After ◽  
Signed Rank Test

Abstract: Physical activity is a body movement produced by skeletal muscles which requires energy. Lack of physical activity has a negative impact, one of which is an increase in body fat percentage above the normal threshold or often associated with obesity. Zumba is one of the popular aerobic exercises in the form of dancing. This study was aimed to compare the percentage of body fat before and after undertaking Zumba exercise in adult woman. This was an experimental field study with the one group pretest-posttest design. Samples were obtained by using total sampling technique. Zumba exercise was undertaken for 4 weeks, 3 times a week for 60 minutes. The percentage of body fat was measured by using an instrument based on Bioelectrical Impedance Analysis. Data were analyzed with the Wilcoxon Signed Rank test. The results showed that l6 subjects were involved in this study. The mean percentage of body fat percentage before Zumba exercise was 39.300% (SD±8.1041) meanwhile the mean percentage of body fat percentage after Zumba exercise was 39.031% (SD±7.9232). The statistical analysis to compare the body fat percentage before and after doing Zumba exercise obtained a P value of 0.065. Conclusion: There was no significant difference in body fat percentage before and after undertaking 4-week Zumba exercise among adult females.Keywords: body fat percentage, Zumba exercise Abstrak: Aktivitas fisik merupakan gerakan tubuh yang dihasilkan otot rangka yang memer-lukan energi. Kurangnya aktivitas fisik seperti olahraga memiliki dampak negatif, salah satunya peningkatan persentase lemak tubuh di atas ambang normal atau obesitas. Olahraga yang sedang popular belakangan ini ialah senam Zumba, yaitu latihan aerobik dalam bentuk tarian. Penelitian ini bertujuan untuk mengetahui perbandingan persentase lemak tubuh sebelum dan setelah melakukan senam zumba pada wanita dewasa. Jenis penelitian ialah eksperimental lapangan dengan desain one group pretest-posttest. Teknik sampling yang digunakan ialah total sampling. Senam Zumba dilakukan selama 4 minggu dengan frekuensi 3 kali seminggu yang berdurasi 60 menit. Persentase lemak tubuh diukur menggunakan alat berbasis bioelectrical impedance analysis. Data penelitian dianalisis dengan uji Wilcoxon Signed Rank Test. Hasil penelitian mendapatkan 16 subjek. Rerata persentase lemak tubuh sebelum senam Zumba yaitu 39,300% (SD±8,1041). Rerata persentase lemak tubuh setelah senam Zumba yaitu 39,031% (SD±7,9232). Hasil uji perbandingan persentase lemak tubuh sebelum dan setelah melakukan senam zumba menunjukkan nilai P=0,065. Simpulan: Tidak terdapat perbedaan bermakna dari persentase lemak tubuh sebelum dan setelah melakukan senam zumba selama 4 minggu pada wanita dewasa.Kata kunci: persentase lemak tubuh, senam Zumba

scholarly journals MARKET REACTION ON THE ANNOUNCEMENT OF SRI KEHATI INDEX IN INDONESIAN STOCK EXCHANGE

2019 ◽  
Author(s):  
Anggita Langgeng Wijaya ◽  
Mia Noviyanti ◽  
Probo Mahayu
Keyword(s):  
Trading Volume ◽  
Market Reaction ◽  
Stock Exchange ◽  
Abnormal Returns ◽  
Rank Test ◽  
Stock Trading ◽  
Population Sampling ◽  
Signed Rank ◽  
Before And After ◽  
Signed Rank Test

The purpose of this study was to test the market reaction to the announcement of the Sri Kehati Index on the Indonesia Stock Exchange. The population in this study is all companies included in the Sri Kehati Index from 2013 to 2016. The selection of samples was taken by the population sampling method. Hypothesis testing is done by paired t test and Wilcoxon Signed Rank Test. The findings of this research are: 1) there is no difference in abnormal returns before and after the announcement of the Sri Kehati Index on the Indonesia Stock Exchange. 2) There is a difference in the activity of stock trading volume before and after the announcement of the Sri Kehati index in the 5th and 6th periods, but there is no difference in the activity of stock trading volume in other periods. The Indonesia Stock Exchange did not react consistently to the announcement of the Sri Kehati Index.

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