Biomechanical characteristics of allogeneic cortical bone pins designed for fracture fixation

2008 ◽  
Vol 21 (02) ◽  
pp. 140-146
Author(s):  
M. R. Edwards ◽  
S. P. James ◽  
W. S. Dernell ◽  
R. J. Scott ◽  
A. M. Bachand ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Cortical Bone ◽  
Fracture Fixation ◽  
Impact Testing ◽  
Left Tibia ◽  
Four Point Bending ◽  
And Gender ◽  
The Right ◽  
Biomechanical Comparison ◽  
Better Than

SummaryThe biomechanical characteristics of 1.2 mm diameter allogeneic cortical bone pins harvested from the canine tibia were evaluated and compared to 1.1 mm diameter stainless steel pins and 1.3 mm diameter polydioxanone (PDS) pins using impact testing and four-point bending. The biomechanical performance of allogeneic cortical bone pins using impact testing was uniform with no significant differences between sites, side, and gender. In four-point bending, cortical bone pins harvested from the left tibia (204.8 ± 77.4 N/mm) were significantly stiffer than the right tibia (123.7 ± 54.4 N/mm, P=0.0001). The site of bone pin harvest also had a significant effect on stiffness, but this was dependent on interactions with gender and side. Site C in male dogs had the highest mean stiffness in the left tibia (224.4 ± 40.4 N/mm), but lowest stiffness in the right tibia (84.9 ± 24.2 N/mm). Site A in female dogs had the highest mean stiffness in the left tibia (344.9 ± 117.4 N/mm), but lowest stiffness in the right tibia (60.8 ± 3.7 N/mm). The raw and adjusted bending properties of 1.2 mm cortical bone pins were significantly better than 1.3 mm PDS pins, but significantly worse than 1.1 mm stainless steel pins (P<0.0001). In conclusion, cortical bone pins may be suitable as an implant for fracture fixation based on initial biomechanical comparison to stainless steel and PDS pins used in clinical practice.

scholarly journals The Influence of Outdoor Education and Gender on the Development of Social Values

2018 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
Amung Ma'mun ◽  
Eka Nugraha ◽  
Adli Hakama ◽  
Jahidin J
Keyword(s):  
Outdoor Education ◽  
Social Values ◽  
Self Control ◽  
Gain Scores ◽  
Environmental Care ◽  
Before And After ◽  
And Gender ◽  
The Right ◽  
Gender Groups ◽  
Better Than

This article reveals the differences in the development of social values through outdoor educational activities (OE) equipped with structured and unstructured games by looking at gender factors. OE activities were conducted in Parongpong and Gunung Artapela, West Bandung West Java Indonesia, followed by 32 students divided into two groups. With a simple 2 x 2 factorial design, the first group was given an OE activity equipped with a structured game and a second group of unstructured games, amounting to 16 people per group. Before and after following OE each sample filled out a questionnaire about the development of social values (environmental care, self-control, communication, and cohesiveness). Gain scores are used to test the hypotheses of the questionnaire after and before following the OE through ANOVA and Tukey. The results are: firstly, there is no overall difference in the effect of OE equipped with structured games with unstructured development of social values; Secondly, there is an interplay between the game model in OE with gender so as to give different effects on the development of social values; Thirdly, there is a difference of influence between OE and structured game with unstructured development of social values in the male gender group, OE equipped with better structured game than unstructured game; Fourth, there is a difference in the effect of OE with unstructured game structured to the development of social values in women's gender groups, OE activities with unstructured games better than structured. OE activities require the right type of game according to their gender. Equips OE with structured games suitable for men and unstructured for women.

Finding the Right Problems: Some HREM Applications to Interfaces

1984 ◽  
Vol 42 ◽  
pp. 376-379
Author(s):  
D. Cherns
Keyword(s):  
Grain Boundaries ◽  
High Resolution Electron Microscopy ◽  
Boundary Structure ◽  
Atomic Structures ◽  
Grain Boundary Structure ◽  
Resolution Electron ◽  
Point To Point ◽  
The Right ◽  
New Generation ◽  
Better Than

The use of high resolution electron microscopy (HREM) to determine the atomic structure of grain boundaries and interfaces is a topic of great current interest. Grain boundary structure has been considered for many years as central to an understanding of the mechanical and transport properties of materials. Some more recent attention has focussed on the atomic structures of metalsemiconductor interfaces which are believed to control electrical properties of contacts. The atomic structures of interfaces in semiconductor or metal multilayers is an area of growing interest for understanding the unusual electrical or mechanical properties which these new materials possess. However, although the point-to-point resolutions of currently available HREMs, ∼2-3Å, appear sufficient to solve many of these problems, few atomic models of grain boundaries and interfaces have been derived. Moreover, with a new generation of 300-400kV instruments promising resolutions in the 1.6-2.0 Å range, and resolutions better than 1.5Å expected from specialist instruments, it is an appropriate time to consider the usefulness of HREM for interface studies.

PENINGKATAN SELF EFFICACY SISWA KELAS X MAN 4 MARTUBUNG MEDAN DENGAN MENGGUNAKAN MODEL PEMBELAJARAN BERBASIS MASALAH

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Anugrah Mulia Tampubolon
Keyword(s):  
Self Efficacy ◽  
Problem Based Learning ◽  
Instructional Approach ◽  
And Gender ◽  
Better Than

The purpose of this research was to identify the inprovement of student’s Self Efficacy as an impact of problem based learnin, asd to find the interaction between the instructional approach and gender with improvement of student’s Self Efficacy. This research was a quasy experiment with the sample of research was 70 students, consisted of X-IPA<sup>2</sup> with 35 students asan experiment class and X-IPA<sup>4</sup> with 35 students as a control class. The data which collected in this research were Self Efficacy. The instruments which used to collect the data were a test of Self Efficacy. The data were analyzed by using two way anava in the SPSS program. Based on the result of this research, it could be concluded that the improvement student’s Self Efficacy by using problem based learning better than improvemet student’s Self Efficacy by using a usuall learning. There was not an interaction between the instructional approach and gender with improvement student’s Self Efficacy.

CRUCIBLE CPM S30V

Alloy Digest ◽  
2003 ◽  
Vol 52 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Martensitic Stainless Steel ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Better Than

Abstract Crucible CPM S30V is a martensitic stainless steel designed with a combination of toughness, wear resistance, and corrosion resistance equal to or better than 440C. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity as well as fracture toughness. It also includes information on corrosion and wear resistance as well as heat treating and machining. Filing Code: SS-891. Producer or source: Crucible Service Centers.

URANUS 52N

Alloy Digest ◽  
1994 ◽  
Vol 43 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Flue Gas ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Flue Gas Desulfurization ◽  
Temperature Performance ◽  
Aisi Type ◽  
Better Than

Abstract URANUS 52N is a nitrogen-alloyed duplex stainless steel improved in stress-corrosion cracking resistance and with pitting and crevice corrosion resistance better than AISI Type 317L. Applications include handling phosphoric acid contaminated with chlorides and in flue gas desulfurization scrubbers. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-566. Producer or source: Creusot-Marrel.

scholarly journals Oral Health Attitudes and Behavior among a Group of Turkish Dental Students

2009 ◽  
Vol 03 (01) ◽  
pp. 24-31 ◽  
Author(s):  
Ilkay Peker ◽  
Meryem Toraman Alkurt
Keyword(s):  
Health Care ◽  
Oral Health ◽  
Dental Health ◽  
Dental Students ◽  
Health Attitudes ◽  
Dental Health Care ◽  
And Gender ◽  
Mouth Wash ◽  
And Behavior ◽  
Better Than

ABSTRACTObjectives: The purpose of this study was to evaluate self-reported oral health attitude and behavior among a group of Turkish dental students and to compare differences in oral health attitudes between years of study and gender.Methods: This study included 267 (153 female, 114 male) dental students. A modified English version of Hiroshima University Dental-Behavioral Inventory (HU-DBI) which consists of twenty-eight dichotomous responses (yes-no) was used.Results: Totally 141 preclinical (1, 2 and 3rd years of study) and 126 clinical students (4 and 5th years of study) who were mean age of 21.16 participated in the study. Statistically significant differences were found between years of study for brushing each of teeth carefully, cleaning the teeth well without using toothpaste, using a toothbrush which has hard bristles and for having had their dentist tell that they brush very well. There were statistically significant differences between females and males for using a toothbrush which has hard bristles and using tooth floss regularly. Statistically significant differences were found for brushing each of the teeth carefully and using mouth wash on regular basis between smokers and non-smokers.Conclusions: This study confirmed that oral and dental health behavior and attitudes and also their knowledge about oral and dental health care of dental students improved with increasing level of education while oral and dental health care of female students were better than males and oral and dental health care of non-smokers were better than smokers. (Eur J Dent 2009;3:24-31)

scholarly journals Pulmonary hydatidosis genotypes isolates from human clinical surgery based on sequencing of mitochondrial genes in Fars, Iran

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Parviz Mardani ◽  
Ali Talebi Ezabadi ◽  
Bahareh Sedaghat ◽  
Seyed Mahmoud Sadjjadi
Keyword(s):  
Hydatid Cyst ◽  
Statistical Correlation ◽  
Left Lobe ◽  
Cox1 Gene ◽  
Fars Province ◽  
Study Population ◽  
Right Lobe ◽  
And Gender ◽  
The Right ◽  
Pulmonary Hydatid Cyst

Abstract Background Cystic echinococcosis (CE)/hydatidosis is an important neglected parasitic zoonotic disease caused by the metacestode of Echinococcus granulosus s.l. The present study was designed to identify the pulmonary CE species/genotypes in isolated human underwent to surgery in our center in Southern Iran. Methods The study population of this study were all patients in Fars province who were admitted to Namazi Hospitals for pulmonary hydatid cyst surgery. Thoracic surgery was performed in the thoracic ward and the cyst/s was removed by open surgery via posterolateral or lateral thoracotomy. DNA was extracted from the germinal layer or the protoscoleces. PCR technique was performed using the cytochrome C oxidase subunit1 (cox1) gene, and the products were sequenced. Results A total of 32 pulmonary hydatid cyst samples were collected from 9 (28%) female and 23 (72%) male aged from 4 to 74 years old. A total of 18(56%) cyst/s were in the left lobe and 14 (44%) cysts in the right lobe. Sequence analysis of the cysts showed that 24 samples (75%) were E. granulosus s.s (G1-G3) genotype and 8 (25%) were E. canadensis (G6/G7) genotype. Conclusion E.granulosus s.s genotype was the most prevalent genotype followed by E. canadensis (G6/G7) genotype. There was no significant statistical correlation between cysts’ size, location, genotype strain, and patients’ age and gender.

scholarly journals Skill and strategic control

Synthese ◽  
2021 ◽  
Author(s):  
Ellen Fridland
Keyword(s):  
Decision Making ◽  
Empirical Evidence ◽  
Mental Imagery ◽  
Sports Psychology ◽  
Mental Practice ◽  
Strategic Control ◽  
Cognitive Representations ◽  
Personal Level ◽  
The Right ◽  
Better Than

AbstractThis paper provides an account of the strategic control involved in skilled action. When I discuss strategic control, I have in mind the practical goals, plans, and strategies that skilled agents use in order to specify, structure, and organize their skilled actions, which they have learned through practice. The idea is that skilled agents are better than novices not only at implementing the intentions that they have but also at forming the right intentions. More specifically, skilled agents are able formulate and modify, adjust and adapt their practical intentions in ways that are appropriate, effective, and flexible given their overall goals. Further, to specify the kind of action plans that are involved in strategic control, I’ll rely on empirical evidence concerning mental practice and mental imagery from sports psychology as well as evidence highlighting the systematic differences in the cognitive representations of skills between experts and non-experts. I’ll claim that, together, this evidence suggests that the intentions that structure skilled actions are practical and not theoretical, that is, that they are perceptual and motor and not abstract, amodal, or linguistic. Importantly, despite their grounded nature, these plans are still personal-level, deliberate, rational states. That is, the practical intentions used to specify and structure skilled actions are best conceived of as higher-order, motor-modal structures, which can be manipulated and used by the agent for the purpose of reasoning, deliberation, decision-making and, of course, the actual online structuring and organizing of action.

The Right to Be Right: Civil-Military Relations and the Iraq Surge Decision

2011 ◽  
Vol 35 (4) ◽  
pp. 87-125 ◽  
Author(s):  
Peter D. Feaver
Keyword(s):  
Hybrid Approach ◽  
Interesting Case ◽  
Civil Military Relations ◽  
Military Commanders ◽  
The Right ◽  
Military Relations ◽  
The Military ◽  
President Bush ◽  
Primary Problem ◽  
Better Than

President George W. Bush's Iraq surge decision in late 2006 is an interesting case for civil-military relations theory, in particular, the debate between professional supremacists and civilian supremacists over how much to defer to the military on decisions during war. The professional supremacists argue that the primary problem for civil-military relations during war is ensuring the military an adequate voice and keeping civilians from micromanaging and mismanaging matters. Civilian supremacists, in contrast, argue that the primary problem is ensuring that well-informed civilian strategic guidance is authoritatively directing key decisions, even when the military disagrees with that direction. A close reading of the available evidence—both in published accounts and in new, not-for-attribution interviews with the key players—shows that the surge decision vindicates neither camp. If President Bush had followed the professional supremacists, there would have been no surge because his key military commanders were recommending against that option. If Bush had followed the civilian supremacists to the letter, however, there might have been a revolt of the generals, causing the domestic political props under the surge to collapse. Instead, Bush's hybrid approach worked better than either ideal type would have.

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