Experimental Study on Uniaxial Compression Behavior of Fissured Loess Before and After Vibration

2022 ◽  
Vol 22 (2) ◽  
Author(s):  
Jian Xu ◽  
Liyang Zhou ◽  
Yanfeng Li ◽  
Jiulong Ding ◽  
Songhe Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Uniaxial Compression ◽  
Compression Behavior ◽  
Before And After

Experimental study on the axial compression behavior of columns confined by BFRP ties

2021 ◽  
Vol 258 ◽  
pp. 113302
Author(s):  
Pu Zhang ◽  
Bowen Chen ◽  
Ye Liu ◽  
Yazheng Tu ◽  
Danying Gao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Axial Compression ◽  
Compression Behavior

scholarly journals Promotion of Early and Exclusive Breastfeeding in Neonatal Care Units in Rural Rwanda: a Quasi-experimental Study

2020 ◽  
Author(s):  
Saidath Gato ◽  
Francois Biziyaremye ◽  
Catherine M. Kirk ◽  
Chiquita Palha De Sousa ◽  
Alain Mukuralinda ◽  
...  
Keyword(s):  
Experimental Study ◽  
Exclusive Breastfeeding ◽  
Child Survival ◽  
Neonatal Care ◽  
Post Intervention ◽  
Factors Associated ◽  
Before And After ◽  
Quasi Experimental ◽  
Evidenced Based ◽  
Additional Support

Abstract Background: Early initiation of breastfeeding after birth and ongoing exclusive breastfeeding for the first 6 months improves child survival, nutrition and health outcomes. However, only 42% of newborns worldwide are breastfed within the first hour of life. Small and sick newborns are at greater risk of not receiving breastmilk and often require additional support for feeding. This study compares breastfeeding practices in Rwandan neonatal care units (NCUs) before and after the implementation of a package of interventions aimed to improve breastfeeding, aligned with the Baby Friendly Hospital Initiative for small and sick newborns.Methods: A pre-post quasi experimental study was conducted at two District hospital NCUs in rural Rwanda from October 2017–December 2017 (pre-intervention) and September 2018–March 2019 (post-intervention). Only newborns admitted before their second day of life (DOL) were included. Data was extracted from patient charts for clinical and demographic characteristics, feeding throughout admission, and patient outcomes. Bivariate analyses were conducted using Fisher’s exact and Wilcoxon rank sum tests. Logistic regression was used to evaluate factors associated with exclusive breastfeeding at discharge following a backwards stepwise procedure.Results: Pre-intervention, 255 newborns were admitted in the NCUs and 793 were admitted in the post-intervention period. The percentage of infants who were exclusively breastfed on their day of birth, or day-of-life zero (DOL0) increased from 5.4% to 35.9% (p<0.001). For newborns discharged alive, the proportion exclusively breastfeeding increased from 69.6% to 87.0% (p<0.001). The mortality rate for all admitted newborns decreased from 16.1% to 10.5% (p<0.019). Factors associated with greater odds of exclusive breastfeeding at discharge included post-intervention time point (Odds Ratio (OR): 4.91, 95% Confidence Interval (CI) 1.99-12.11, p<0.001), and admission for infection (OR 2.99, 95%CI 1.13-7.93, p=0.027). Home deliveries (OR 0.15, 95%CI 0.05-0.47, p=0.001), preterm delivery (OR 0.36, 95%CI 0.15-0.87, p=0.0260 and delayed first breastmilk feed (OR=0.04 for DOL3 vs. DOL0, 95%CI 0.01, 0.35, p=0.004) reduced odds of exclusive breastfeeding at discharge. Conclusion: Expansion and adoption of evidenced-based guidelines, using innovative approaches, aimed at the unique needs of small and sick newborns should be expanded and adapted in similar settings to improve outcomes for these infants.

scholarly journals Comparative Analysis of Capabilities of Different Types of Cone-Beam Tomography in an Experimental Study of Root Canals of Teeth Filled with High-Density Materials (part 2)

2021 ◽  
pp. 51-61
Author(s):  
A. Yu. Vasil'ev ◽  
V. V. Petrovskaya ◽  
E. A. Nichipor ◽  
V. G. Alpatova ◽  
N. N. Potrakhov ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Experimental Study ◽  
Cone Beam Computed Tomography ◽  
Comparative Assessment ◽  
High Density ◽  
Cone Beam ◽  
Root Canals ◽  
Different Types ◽  
Before And After ◽  
Cone Beam Tomography

During the course of this experimental study tomograms of extracted teeth were analyzed before and after filling the root canals with an endodontic material and fragments of broken metal instruments for root canal treatment. During the first stage of the experiment, untreated extracted teeth were scanned using conebeam computed tomography and microfocus cone-beam computed tomography. A comparative assessment of capabilities of the two methods of cone-beam computed tomography based on examination of untreated root canals was carried out. The second part of the study is dedicated to visualization of root canals that contain foreign high-density materials.

scholarly journals Immunization competence retention in medical students: a comparation between conventional lectures and lectures with simulations method

2016 ◽  
Vol 55 (6) ◽  
pp. 339 ◽  
Author(s):  
Hartono Gunadi ◽  
Rini Sekartini ◽  
Retno Asti Werdhani ◽  
Ardi Findyartini ◽  
Muhammad Arvianda Kevin Kurnia
Keyword(s):  
Experimental Study ◽  
Medical Students ◽  
Medical School ◽  
Intervention Group ◽  
Control Group ◽  
Vaccine Preventable Diseases ◽  
Before And After ◽  
Quasi Experimental

Background Immunization is recognized as one of the strategiesto reduce vaccine preventable diseases. Competency related toimmunization are consequently important for medical students andthe medical school needs to assure the competence acquisition.Objective To assess competence related to immunization andits retention following lectures with simulations compared tolectures only.Methods A quasi-experimental study was conducted to the 5th yearstudents of University of Indonesia Medical School during the ChildAdolescent Health Module in 2012-2013. The intervention grouphad lectures with simulations and the control group had lecturesonly. Immunization knowledge was assessed with a 30 multiplechoice question (MCA) items performed before and after themodule. Competence retention was assessed by MCQ (knowledge)and OSCE (skills) 2-6 months afterwards.Results Sixty eight subjects for each group with similarcharacteristics were analyzed. There was significant differenceafter module MCQ score between two groups. Competenceretention in 2-6 months after module completion was betterin intervention group, both for the knowledge (median MCQscore of 70.00 (range 37-93) vs. mean score of 58.01 (SD 12.22),respectively; P<0.001) and skill (OSCE mean scores of 75.21 (SD10.74) vs. 62.62 (SD 11.89), respectively; P < 0.001). Proportionof subjects in the intervention group who passed both the MCQand OSCE were also significantly greater.Conclusion Lectures with simulations are proved to bemore effective in improving medical students’ immunizationcompetence as well as its retention compared to lectures onlyapproach.

scholarly journals Efektivitas Tindakan Skeling terhadap Perawatan Gingivitis di Rumah Sakit Gigi dan Mulut Universitas Sam Ratulangi Manado

e-GIGI ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Febri Korompot ◽  
Krista V. Siagian ◽  
Damajanty H. C. Pangemanan ◽  
Johanna Khoman
Keyword(s):  
Experimental Study ◽  
Inflammatory Response ◽  
Periodontal Disease ◽  
Sampling Technique ◽  
P Value ◽  
Test Design ◽  
Gingival Index ◽  
Paired Sample ◽  
Before And After ◽  
Post Test

Abstract: The most common periodontal disease is gingivitis which is caused by biofilm accumulation on plaque around the gingival margin and inflammatory response to bacteria. Scaling is used to eliminate bacterial and calculus deposits that cause gingivitis. This study was aimed to determine the effectiveness of scaling in gingivitis treatment. This was a pre-experimental study with one group pre and post test design. Samples were obtained by using total sampling technique. There were 30 patients aged 17-45 years that had scaling performed on them at RSGM in 2019. Gingivitis was observed before and after scaling using the modified gingival index (MGI). The results showed that before scaling, there were mild gingivitis 23.30%, moderate gingivitis 70%, and severe gingivitis 6.70%. Two days after scaling, mild gingivitis and moderate gingivitis were observed 50% each. The paired sample t-test showed a p-value of 0.000. In conclusion, scaling is effective in gingivitis treatment based on the assessment using the modified gingival index.Keywords: gingivitis, scaling, modified gingival index Abstrak: Penyakit periodontal yang paling sering dijumpai yakni gingivitis (peradangan gingiva). Gingivitis disebabkan oleh akumulasi biofilm pada plak di sekitar margin gingiva dan respon peradangan terhadap bakteri. Tindakan untuk menghilangkan deposit bakteri dan kalkulus yang menyebabkan gingivitis salah satunya ialah tindakan skeling. Tujuan penelitian ini untuk mengetahui efektivitas tindakan skeling terhadap perawatan gingivitis. Jenis penelitian ialah pra eksperimental dengan one grup pre and post test design. Pengambilan sampel menggunakan teknik total sampling terhadap pasien yang berusia 17-45 tahun yang dilakukan tindakan skeling di RSGM pada tahun 2019 berjumlah 30 orang. Penelitian ini dilakukan dengan melihat gingivitis sebelum skeling dan setelah skeling melalui pengukuran keparahan gingiva menggunakan modified gingival index (MGI). Hasil penelitian menunjukkan bahwa sebelum skeling gingivitis ringan 23,30%, gingivitis sedang 70%, gingivitis berat 6,70%. Dua hari pasca skeling didapatkan gingivitis ringan dan gingivitis sedang sama besar yaitu masing-masing 50%. Hasil uji t berpasangan menunjukkan nilai p=0,000. Simpulan penelitian ialah tindakan skeling efektif terhadap perawatan gingivitis berdasarkan penilaian modified gingival index.Kata kunci: gingivitis, skeling, modified gingival index

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