Relationship between Feedrate and Fatigue Life of Al7075-T6 Specimens before and after Shotpeening

2008 ◽  
Vol 580-582 ◽  
pp. 109-112 ◽  
Author(s):  
Hyoung Tae Kim ◽  
Ki Hoon Shin
Keyword(s):  
Fatigue Life ◽  
Loading Conditions ◽  
Mean Diameter ◽  
Before And After ◽  
Bending Stresses ◽  
The Mean ◽  
The Relationship

This paper presents a study on the relationship between feedrate and fatigue life of Al7075-T6 specimens before and after shotpeening. For this purpose, six groups of specimens, each of which consists of eight specimens, were first machined at six different feedrates (0.05, 0.10, 0.15, 0.20, 0.25, 0.30 mm/rev). Half of eight specimens in each group were then peened and the others remained un-peened. Next, the fatigue life was measured by using 4-point rotary bending machine. One observation was that the fast the feedrate was, the large the mean diameter of a specimen was. To apply the same bending stresses in all cases, different loading conditions were thus recalculated and applied to specimens based on their mean diameters. Finally, the effect of feedrate on the fatigue life was estimated by comparing twelve sets of specimens (six groups times two sets, peened and un-peened).

scholarly journals Examining the Relationship Between Enterprise Risk Management and Firm Performance in Malaysia

2019 ◽  
Vol 10 (3) ◽  
pp. 239
Author(s):  
Mazurina Mohd Ali ◽  
Nur Shazwani Ab Hamid ◽  
Erlane K Ghani
Keyword(s):  
Risk Management ◽  
Firm Performance ◽  
Enterprise Risk Management ◽  
Audit Firm ◽  
Listed Firms ◽  
Significant Coefficient ◽  
Enterprise Risk ◽  
Before And After ◽  
The Mean ◽  
The Relationship

This study aims to examine the relationship between enterprise risk management (ERM) implementation and firm performance in Malaysia. Using the sample from 2010 to 2016, this study examines the relationship between ERM and firm performance among Malaysian top 100 public listed firms registered on the Index FTSE Bursa Malaysia 100 (FBM100) KLSE. This study also provides comparisons before and after the introduction of Bursa Malaysia Guidelines 2013. This study shows a positive and significant coefficient between profitability and firm performance towards ERM implementation. However, this study shows insignificant relationship between firm size, financial leverage and audit firm with firm performance. This study also shows that there is an increase in the mean score and standard deviation of these variables after the implementation of Bursa Malaysia Guideline 2013. The findings in this study provides an understanding to the Malaysian public listed firms on the importance of ERM and subsequently, maximise the benefits of ERM especially after the introduction of Bursa Malaysia Guidelines 2013 for the benefits of their stakeholders and regulatory improvement in future.

scholarly journals A Morphometric Study of the Foramen of Diaphragma Sellae and Delineation of Its Relation to Optic Neural Pathways through Computer Aided Superimposition

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Doris George Yohannan ◽  
Renuka Krishnapillai ◽  
Romi Suresh ◽  
Shobha Ramnarayan
Keyword(s):  
Pituitary Tumors ◽  
Morphometric Study ◽  
Neural Pathways ◽  
Optic Chiasma ◽  
Lateral Dimension ◽  
Before And After ◽  
The Mean ◽  
Diaphragma Sellae ◽  
Relationship Of ◽  
The Relationship

The diaphragma sellae (DS) is a fold of dura that forms a partial roof over the pituitary gland. The foramen of the diaphragma sellae (FDS) is thereby a pathway for suprasellar extension of pituitary tumors. The purpose of this study was to describe the anatomical dimensions of the DS and FDS and to understand the relationship of FDS with the overlying optic chiasma. The study was conducted in 100 autopsy cases. Measurements were taken using vernier calipers. Photographs, taken before and after removal of optic pathway, were superimposed using image processing software. The results showed that the mean A-P dimension of DS was 1.17 ± 0.48 cm; the lateral dimension of DS was 1.58 ± 0.60 cm. The mean A-P dimension of FDS was 0.66 ± 0.42 cm; the lateral dimension of FDS was 0.82 cm ± 0.54 cm. The shapes of FDS were irregular (40%), transversely oval (29%), circular (13%), sagittally oval (11%), or trapezoid with posterior dimension more than the anterior one (6%) or anterior dimension more than the posterior one (1%). The margins of FDS were either well defined (31%) or ill defined (69%). The positional relation of FDS to optic chiasma was also found out.

scholarly journals NYERI DESMINORE PADA REMAJA PUTRI DENGAN KOMPRES HANGAT

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Ika Friscila
Keyword(s):  
Data Collection ◽  
Young Women ◽  
Transitional Period ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
The Relationship

Latar belakang: Masa remaja adalah periode peralihan dari masa anak ke masa dewasa. Salah satu perubahan yang dialami remaja putri adalah mengalami menstruasi. Salah satu keluhan yang paling sering dirasakan saat menstruasi yaitu dismenore (nyeri saat haid).Tujuan: Menganalisis hubungan pemberian kompres hangat terhadap pengurangan nyeri dismenore pada remaja putri.Metode: Desain penelitian ini menggunakan pretest-posttest perbandingan dua kelompok. Pengumpulan data telah dilakukan pada bulan Januari-Februari 2020. Populasi pada penelitian ini mahasiswa Jurusan Kebidanan UNISM yang mengalami dismenorea. Sampelnya 44 responden.Hasil: Didapatkan bahwa rata-rata nyeri responden sebelum diberikan kompres hangat yaitu 6,04 (nilai SD 1.046) sedangkan rata-rata nyeri responden setelah diberikan kompres hangat adalah 3,09 (nilai SD 1.231). Terdapat perbedaan yang bermakna sebelum dan setelah dilakukan kompres hangat dengan p = 0,000 dimana p 0,05.Kesimpulan: Kompres hangat dapat menurunkan tingkat nyeri dismenorea pada mahasiswa di Jurusan Kebidanan UNISM. ABSTRACT Background: Adolescence is a transitional period from childhood to adulthood. One of the changes experienced by young women is experiencing menstruation. One of the most common complaints during menstruation is dysmenorrhea (pain during menstruation).Objective: To analyze the relationship between giving warm compresses and reducing dysmenorrhea pain in young women.Methods: The design of this study used a pretest-posttest comparison of two groups. Data collection was carried out in January-February 2020. The population in this study were students of the UNISM Midwifery Department who experienced dysmenorrhoea. The sample is 44 respondents.Results: The mean pain of respondents before being given warm compresses was 6.04 (SD value 1.046), while the mean pain of respondents after being given warm compresses was 3.09 (SD value 1.231). There is a significant difference before and after warm compresses with p = 0.000 where p 0.05.Conclusion: Warm compresses can reduce the level of dysmenorrhea pain in Midwifery Department students, UNISM. Keywords: Dysmenorrhea, Warm Compress, Young Women  Kata Kunci: Dismenore, Kompres Hangat, Remaja Putri

Percutaneous Endoscopic Gastrostomy in Children: Influence on Gastroesophageal Reflux

PEDIATRICS ◽  
1996 ◽  
Vol 97 (5) ◽  
pp. 726-728
Author(s):  
V. Launay ◽  
F. Gottrand ◽  
D. Turck ◽  
L. Michaud ◽  
S. Ategbo ◽  
...  
Keyword(s):  
Gastroesophageal Reflux ◽  
Enteral Nutrition ◽  
Percutaneous Endoscopic Gastrostomy ◽  
Endoscopic Gastrostomy ◽  
Before And After ◽  
The Mean ◽  
Few Data ◽  
Surgical Gastrostomy ◽  
The Relationship ◽  
Gastrostomy In Children

Objective. Few data exist in the literature about the relationship between percutaneous endoscopic gastrostomy (PEG) and gastroesophageal reflux (GER) in children, and the data that do exist are contradictory. The aim of the present study was to evaluate the effect of PEG on GER. Methods. Twenty children underwent PEG for enteral nutrition. They were 55 ± 55 months old and weighed 13 ± 10 kg. A pH study was performed before and after PEG without treatment when GER status was unknown (n = 10) or under treatment (n = 10) if previous GER was demonstrated. In these cases, the pH study was performed under the same treatment before and after PEG. Results. Six pH studies had abnormal results before PEG. After PEG, the GER of these 6 children significantly improved after the treatment was intensified (n = 5) or spontaneously normalized (n = 1). Results of 13 pH studies that were previously normal remained normal. Only one child with a normal reflux index before PEG had GER after it. For the 20 children, the mean reflux index did not change significantly after PEG (5.5% vs 5.6%). Conclusion. Contrary to surgical gastrostomy, PEG does not worsen GER. Therefore, GER is not a contraindication to PEG.

scholarly journals Single dose of testosterone in children with hypospadias: any effect on the diameter of the glans penis?

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Kevin Emeka Chukwubuike
Keyword(s):  
Body Weight ◽  
Single Dose ◽  
Glans Penis ◽  
Prospective Evaluation ◽  
Weight Group ◽  
Mean Diameter ◽  
Before And After ◽  
Group A ◽  
The Mean ◽  
Group B

Abstract Background The purpose of this study was to assess the effect of a single dose of testosterone on the diameter of the glans penis. Methods This was a prospective evaluation of the effect of a single dose of testosterone on the diameter of the glans penis of children with hypospadias. The diameter of the glans penis was measured transversely at the level of the coronal sulcus using Vernier calipers. The patients were categorized into two groups: Group A and Group B. Group A received intramuscular testosterone at the dose of 2 mg per kilogram body weight. Group B did not receive any testosterone and served as control. The diameter of the glans penis was evaluated at the beginning of the study and at 4 weeks after the testosterone injection. Results Overall, 64 patients were evaluated. There were 32 patients in group A (50%) and 32 patients in group B (50%). The mean diameter in group A before and after testosterone injection was 17.6 mm ± 2.5 SD and 17.8 ± 2.3 SD, respectively. The mean diameter in group B at onset and after 4 weeks was 17.6 mm ± 2.4 SD and 17.7 ± 2.4 SD, respectively. p = 0.12 which is statistically insignificant. Conclusion Single dose of testosterone in children with hypospadias does not produce significant increase in the diameter of the glans penis.

Energetic investigation of the fatigue of wood

Holzforschung ◽  
2014 ◽  
Vol 68 (7) ◽  
pp. 843-848 ◽  
Author(s):  
Yasutoshi Sasaki ◽  
Ayaka Oya ◽  
Mariko Yamasaki
Keyword(s):  
Fatigue Limit ◽  
Static Strength ◽  
Loading Conditions ◽  
Static Tests ◽  
Bending Fatigue ◽  
A Value ◽  
New Findings ◽  
Multiple Loading ◽  
The Mean ◽  
The Relationship

Abstract There are gaps in our knowledge regarding temporal changes in wood stability and mechanical properties in the context of wood durability. Energetic analyses have been performed in this study based on experimental results on the bending fatigue of wood under multiple loading conditions. New findings regarding the fatigue limit and fatigue life (Nf) are presented. The strain energy (SE) obtained from stress-strain envelopes until wood reaches its Nf is a value specific to wood species and static strength regardless of the loading conditions. This value is about 50% higher than the SE in static tests. The relationship between mean energy loss (EL) and stress level (SL) to the point of fatigue failure is bilinear, and the mean EL is closely related to Nf. Moreover, the SL – when mean EL approaches a specific value (∼1.10 kJ m-3 per cycle) as Nf approaches infinity – is considered to be the fatigue limit; the latter is estimated to be about 20–30% of static strength.

Cervical spinal motion before and after surgery in patients with Chiari malformation Type I associated with syringomyelia

2007 ◽  
Vol 7 (5) ◽  
pp. 473-477 ◽  
Author(s):  
Atsushi Ono ◽  
Futoshi Suetsuna ◽  
Kazumasa Ueyama ◽  
Toru Yokoyama ◽  
Shuichi Aburakawa ◽  
...  
Keyword(s):  
Foramen Magnum ◽  
Type I ◽  
Foramen Magnum Decompression ◽  
Chiari Malformation Type I ◽  
Spinal Motion ◽  
Flexion Extension ◽  
Before And After ◽  
The Mean ◽  
The Relationship ◽  
Tonsillar Descent

Object There have been few reports about the cervical spinal motion in patients with Chiari malformation Type I (CM-I) associated with syringomyelia. To investigate this phenomenon, the relationship between the preoperative cervical range of motion (ROM) and the stage of cerebellar tonsillar descent as well as the cervical ROM before and after foramen magnum decompression (FMD) were evaluated. Methods Thirty patients who had CM-I associated with syringomyelia and who underwent FMD participated in the study. The ROM and lordosis angle of the cervical spine were measured on x-ray films. In addition, the relationship between preoperative degree of cerebellar tonsillar descent and the ROM between the levels of the occiput (Oc) and C2 was investigated. Results The mean flexion–extension ROM at Oc–C2 was 15.5° before and 14.1° after surgery, and the mean flexion–extension ROM of C2–7 was 55.1° before and 52.8° after surgery. The mean pre- and postoperative lordosis angles at C2–7 were 16.8 and 19.1°, respectively. There was no significant difference between the values measured before and after surgery. There was no correlation between the degree of cerebellar tonsillar descent and the ROM at Oc–C2. Conclusions Foramen magnum decompression is an excellent surgical technique that has no effect on the postoperative cervical ROM and cervical alignment.

Effect of Fe on the Precipitate Characteristics and Out-of-Pile Corrosion Behavior of Zr-1Nb-xFe Alloys

2013 ◽  
Vol 743-744 ◽  
pp. 1-7
Author(s):  
Rong Shan Wang ◽  
Li Kui Weng ◽  
Yan Wei Zhang ◽  
Jian Qiao Geng ◽  
Chen Xi Du ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Volume Fraction ◽  
Fe Content ◽  
Mean Diameter ◽  
The Mean ◽  
The Relationship ◽  
Zr Alloy ◽  
Fe Addition

The effects of Fe addition on the precipitate characteristics and out-of-pile corrosion behavior of Zr-1Nb-xFe alloys, with x=0, 0.2 and 0.4 respectively, were investigated. The experimental results showed that the alloy with the composition of Zr-1Nb-0.4Fe had the best corrosion resistance and the alloy with the composition of Zr-1Nb-0.2Fe had the worst corrosion resistance. The relationship between the corrosion behavior and the microstructures including precipitate characteristics was discussed, and the elements contents, area fraction, as well as the mean diameter of the precipitate were analyzed. The β-Nb precipitate was found in Zr-1Nb alloy, both Zr (Nb,Fe)2 precipitate and β-Nb precipitate were formed in Zr-1Nb-0.2Fe alloy, while only Zr (Nb,Fe)2 precipitate was observed in Zr-1Nb-0.4Fe alloy. It has been found that the size of precipitates increased with the increasing of Fe content. This work indicated that the Fe content dominates the crystal structure, volume fraction and the element contents of the precipitate, which affect the corrosion resistance of Zr alloy.

scholarly journals Transformation of Dependency and Association in UML Design Class

2019 ◽  
Vol 8 (10S) ◽  
pp. 385-388
Keyword(s):  
Functional Programming ◽  
Real Life ◽  
Test Statistic ◽  
C Language ◽  
Before And After ◽  
String Variable ◽  
The Mean ◽  
Level Of Significance ◽  
Conceptual Relationships ◽  
The Relationship

This paper presents two new conceptual relationships between classes of software development known as dependency and association. The design between the two relationships could be interchangeable because it always takes place in real-life situations — for instance, the relationship from friends to husband-wife and vice versa. However, in terms of coding, the most important factor is system performance. That means the designer could write the code as dependency or association to provide the same result. To improve the efficiency of the program, the researcher writes the code in the C++ language to execute four types of variables named messages, strings, calculation, and sorting. The four types of the variable used to test the performance of aggregation, composition, dependency, and functional programming, the timestamp was used to measure the execution time before and after for each case 50 times. The F-test statistic was used to compare the mean difference of each type of variable. The researcher found that for the Message variable. The functional programming is the fastest, followed by aggregation, composition, and dependency, the average C.P.U. time are 13566.60, 17891.70, 18532.66 and 19336.76, at 0.0 level of significance. For the String variable found that functional programming is the fastest followed by dependency, composition, and aggregation, the average C.P.U. time are 23785.88, 27449.76, 28478.24 and 28788.18, at 0.0 level of significance. For calculation found that functional programming is the fastest, followed by aggregation, composition, and dependency, the average C.P.U. time are 26982.68, 29311.86, 29377.50 and 29397.30, at 0.0 level of significance. For sorting found that functional programming is the fastest, followed by aggregation, composition, and dependency, the average C.P.U. time are 17925.20, 18408.36, 21641.68 and 22861.14, at 0.0 level of significance.

scholarly journals Safety of Radiotherapy in Patients with Cardiac Implantable Electronic Devices

2021 ◽  
Author(s):  
Donghoon Han ◽  
Ji Hyun Lee ◽  
Youngjin Cho ◽  
Il-Young Oh
Keyword(s):  
Cumulative Dose ◽  
Medical Records ◽  
Beam Energy ◽  
Electronic Devices ◽  
Cardiac Implantable Electronic Devices ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
The Relationship

Abstract Background: Patients with cardiac implantable electronic devices (CIEDs) usually have multiple comorbidities, and some require radiotherapy (RTx) for cancer treatment. However, the effect of RTx in patients with CIEDs is unclear. We aimed to examine the effectiveness of RTx in patients with CIEDs, and share our real-world clinical experience in this population.Methods: We recruited patients with a pacemaker or implantable cardioverter-defibrillator who underwent RTx between April 2009 and August 2019. RTx and CIED interrogation data were collected from electronic medical records. Patients who received an RTx cardiology consultation and CIED interrogation before and after RTx were assigned to the proper consultation (PC) group. All others were enrolled in the no-consultation (NC) group. Results: Out of 23 patients, 3 (13.0%) and 20 (87.0%) patients were assigned to the PC and NC groups, respectively. The most common RTx sites were the abdomen and pelvis (34.8%). The mean cumulative dose was 50.1 ± 11.7 Gy, and the mean beam energy was 10.3 ± 4.01 mV. The PC and NC groups showed no significant difference in cumulative dose (51.5 ± 12.1 vs. 45.3 ± 3.9, p=0.19) or beam energy (10.4 ± 4.03 vs. 7.0 ± 1.41, p=0.08). There was no significant between-group difference in any pre-RTx CIED parameter. Two patients died during the study period; both were in the NC group. The relationship between death and device malfunction was not clear in either case.Conclusions: Patients with CIEDs frequently do not receive a cardiology consultation before RTx. Although radiotherapy-related CIED complications occur stochastically and are difficult to predict, cooperation between the cardiology and radiation therapy departments, and regular device follow-up are necessary for the safety of these patients.

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