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Saruchi, Sarah ’A, Mohd HM Ariff, Hairi Zamzuri, Nurhaffizah Hassan e Nurbaiti Wahid. "Modeling of occupant’s head movement behavior in motion sickness study via time delay neural network". SIMULATION 96, n. 2 (15 luglio 2019): 131–40. http://dx.doi.org/10.1177/0037549719862864.
Testo completoAbstract (sommario):
Passengers are more susceptible to experiencing motion sickness (MS) than drivers. The difference in the severity of MS is due to their different head movement behavior during curve driving. When negotiating a curve, the passengers tilt their heads towards the lateral acceleration direction while the drivers tilt their heads against it. Thus, to reduce the passengers’ level of MS, they need to reduce their head’s tilting angle towards the lateral acceleration direction. Designing MS minimization strategies is easier if the correlation between the head movement and lateral acceleration is known mathematically. Therefore, this paper proposes the utilization of a time delay neural network (TDNN) to model the correlation of the occupant’s head movement and lateral acceleration. An experiment was conducted to gather real-time data for the modeling process. The results show that TDNN manages to model the correlation by producing a similar output response to the actual response. Thus, it is expected that the correlation model could be used as an occupant’s head movement predictor tool in future studies of MS.
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Petersen, W. J., J. M. Lankes, F. Paulsen e J. Hassenpflug. "The Arterial Supply of the Lesser Metatarsal Heads: A Vascular Injection Study in Human Cadavers". Foot & Ankle International 23, n. 6 (giugno 2002): 491–95. http://dx.doi.org/10.1177/107110070202300604.
Testo completoAbstract (sommario):
The possibility of avascular changes of the metatarsal heads following forefoot surgery has been previously documented. The aim of this study was to investigate the arterial supply of the lesser metatarsal heads with regard to osteotomies of these bones. We used epoxy resin injections and a modified Spalteholz technique in human cadaveric specimens to demonstrate the intraosseous and extraosseous blood supply of the lesser metatarsals. The metatarsal heads had two arterial sources: The dorsal metatarsal arteries, which arose from the dorsalis pedis artery, and The plantar metatarsal arteries, which are branches of the posterior tibial artery. These two vessels typically anastomosed at two sites about the metatarsal heads, forming a vascular ring and provided an extensive extraosseous arterial network around the metatarsal heads. Small arterial branches of this network run distally on the metatarsal cortex to enter the bone of the metatarsal head. The nutrient arteries traversed the cortex of the metaphysis close to the capsular and ligamentous insertions to provide multiple branches for the supply of the subchondral bone. Extensive capsular stripping during metatarsal head osteotomies results in damage to the medial and lateral head vessels.
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Bhar, Arnab, e Ananya Biswas. "Variations in the Biceps Brachii in North Bengal - An Observational Study". Journal of Evidence Based Medicine and Healthcare 8, n. 23 (7 giugno 2021): 1993–97. http://dx.doi.org/10.18410/jebmh/2021/374.
Testo completoAbstract (sommario):
BACKGROUND Supernumerary heads of the biceps brachii are a common anatomical variation, with an incidence of 3.7 % to 20.5 % in various studies carried out around the world. They can occur in various forms, and produce a range of clinical symptoms, such as impingement syndromes at the shoulder joint, and nerve-compression syndromes in the arm. An awareness of these variations is helpful when assessing patients with pain symptoms in the region of the shoulder and arm. The purpose of this study was to examine the morphology, nerve supply, and variations in morphology, of the biceps brachii in a population in Eastern India. METHODS This observational study was carried out on 20 (17 males, 3 females) formalinembalmed cadavers during routine gross anatomy dissection of the upper limb, using standard dissection methods. We examined the morphology, nerve supply, and variations in morphology, of the biceps brachii in a population in Eastern India. RESULTS Three upper limbs (7.5 % out of 40 limbs) showed supernumerary heads. In one male, a third humeral head of origin, from the anteromedial surface of the shaft of the humerus was observed in the left upper limb. In another male cadaver, we found a unique case with bilateral third heads with an aponeurotic origin from the capsule of the shoulder joint, with the third head comparable in size and bulk to the long and short heads. The remaining upper limbs showed the usual morphology, with the long head originating intracapsularly from the supraglenoid tubercle of the humerus and the glenoid labrum, and the short head from the tip of the coracoid process of the scapula. Insertions were usual. CONCLUSIONS Our study found an incidence of 7.5 % in a population sample from Eastern India, North Bengal. Supernumerary heads can occur in various forms, and can result in varied clinical symptoms. KEYWORDS Biceps Brachii, Biceps Brachii Variations, Supernumerary Head, Third Head, Humeral Head, Long Head of Biceps
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Rohilla, Jyoti, Aarti Rohilla, Kamal Singh e Suresh Kanta Rathee. "Pattern study of union of two heads of biceps and its clinical significance". International Journal of Research in Medical Sciences 5, n. 4 (28 marzo 2017): 1646. http://dx.doi.org/10.18203/2320-6012.ijrms20171280.
Testo completoAbstract (sommario):
Background: Biceps brachii derives its name from its two proximally attached parts or ‘heads’ that is known as long head and short head. Two tendons form elongated bellies that though closely applied get fused within 7cm or so above the elbow joint. These variations should be kept in mind during surgical and diagnostic procedures done by clinicians.Methods: A total of 18 cadavers were dissected for two successive years during undergraduate and were observed for different patterns of fusion of two heads of biceps brachii.Results: The present study showed that frequency of fusion of heads of biceps brachii in its upper one-third part was observed less commonly while it was frequently observed in its middle one-third part.Conclusions: Variation in union of heads might be significant in causing compression of neurovascular structures because of their close relationship to the brachial artery and median nerve.
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Dambrauskienė, Dalia, e Reda Ponelienė. "WORKING TIME PLANNING OF HEADS OF PRE-SCHOOL EDUCATIONAL INSTITUTIONS: PROBLEMS AND OPPORTUNITIES". ŠVIETIMAS: POLITIKA, VADYBA, KOKYBĖ / EDUCATION POLICY, MANAGEMENT AND QUALITY 12, n. 2 (15 dicembre 2020): 77–91. http://dx.doi.org/10.48127/spvk-epmq/20.12.77.
Testo completoAbstract (sommario):
Activity areas of the head of the educational institution include school administration and management, purposeful use of human and material resources to ensure the quality of education. The school context influences the heads’ working day and their time distribution; therefore, it is relevant to conduct research to evaluate the contextual factors determining the opportunities and limitations of heads’ working time planning. The aim of the research is to investigate the distribution of working time of pre-school institutions’ heads for performance of different functions and to reveal the opportunities and limitations of working time planning. The study was conducted in 2018-2019. During the first stage of the study, one head of the pre-school institution from each of three European countries (Lithuania, France, Italy) was surveyed. The results of the survey have shown certain similarities in heads’ activities due to the specificity of the head’s work, starting with the formation of strategic aims, parents’ and social partners’ involvement in the institution’s activities and finishing with the assessment of the quality of the institution’s activity. Given that heads of different countries work in quite different contexts and under different working conditions, it is not appropriate to draw summarising conclusions, but the obtained data can be used in developing the methodology of analogous research. During the second stage, the topics of planning the working time of the heads of pre-school educational institutions were analysed. The heads of Siauliai pre-school educational institutions, involved in the study, have revealed that they spend most of their time working with the documents of the institution, solving personnel and financial issues. In other words, the activity prevailing in the work of the heads of Lithuanian pre-school institutions is administrative-bureaucratic processes, while the heads themselves are inclined to use part of that time for supervision and improvement of the educational process and for their own professional development. Although one of the head’s functions is proper and timely planning of activities, and thus, of their own working time, in practice obstacles to time planning, related to management of human and material resources and multi-tasking, when several activities differing in content and scope are performed simultaneously, are encountered. Keywords: working time planning, pre-school educational institution, head of the pre-school educational institution, distributed leadership.
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Afifah, Nurul, e Dian Anita Nuswantara. "The Effect of Managerial Skills, Education Level, and the Role of Village Consultative Body toward the Performance of Village Head". Jurnal Ekonomi Akuntansi dan Manajemen 20, n. 1 (12 maggio 2021): 65. http://dx.doi.org/10.19184/jeam.v20i1.24107.
Testo completoAbstract (sommario):
Researchers choose to research in Kabupaten Bojonegoro, because there were cases of misappropriation of village funds by the village head and there were cases of villages budget reporting to the head of local government. This study aims to look at the factors that can improve the performance of village heads in village finances. There are three independent variables tested, namely managerial ability, level of education, and the role of the Village Consultative Body (BPD), while the dependent variable in this study is the performance of village financial management. This study took a setting in Kabupaten Bojonegoro by taking a sample of village heads in 6 (six) sub-districts that received the largest village funds. The type of data used in this study is primary data collected through distributing questionnaires to respondents. The distribution of the questionnaire was carried out by meet the village head directly at the village head’s office, attend the village head forum, and send the questionnaire link via Whatsapp media. They are 150 samples collected through the purposive sampling technique. The data analysis technique used multiple linear regression with the SPSS 23 application program. The test results showed that the managerial ability and the role of the BPD had a significant effect on the village head's performance, while the level of education did not affect the performance of the village head.
Keywords: Managerial skills, Level of education, The role of BPD, Performance, Head of village
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De Petrocellis, L., V. Maharajan, B. De Petrocellis e R. Minei. "Bud induction in decapitated Hydra attenuata by 5-azacytidine: a morphological study". Development 93, n. 1 (1 aprile 1986): 105–19. http://dx.doi.org/10.1242/dev.93.1.105.
Testo completoAbstract (sommario):
The effect of 5-azacytidine (5-azaCR) on head regeneration and budding in hydra are reported. Hydra attenuata were exposed to various doses of 5-azaCR for 48 h and then decapitated and cultured. Head regeneration and bud formation were observed for 12 days after decapitation. Untreated control hydra regenerated heads within 7 to 8 days of decapitation with a budding index of 0·2. Buds invariably arose in the normal budding zone (below the gastric region). In the group treated with 0·8mM-5-azaCR, 9 days after decapitation head regeneration was seen in only 13% of animals, and an average of two buds per hydra were formed, most of which were in the vicinity of the distal end. Induction of budding was also seen in the animals that regenerated heads. In animals exposed to 1 mM-5-azaCR three main types of responses were observed 9 days after decapitation. (1) 44% of the animals regenerated normal heads; about half of them developed at least one bud and these buds originated in the budding zone. (2) 17·5% of the animals developed abnormal, long hypostome-like structures with single or bifurcated tentacles at theirtips. There were at least two buds per animal and they were invariably at abnormal sites. (3) 32% of the animals failed to regenerate heads, although they developed two buds. 87% ofthese buds originated in abnormal sites of the body column and a large number (72%) did not detach even by the 12th day after decapitation. Both 5 and 10 mM of 5-azaCR were toxic to the animals; the survivors formed large globeshaped heads. Bud induction was seen in 60% and 28% of animals in the 5 and 10 mM groups, respectively. These observations demonstrate that 5-azaCR induces bud formation in hydra at doses that inhibit head regeneration. This bud induction might be due to a specific expression of gene products responsible for bud formation.
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Hembus, Jessica, Lisa Rößler, Mario Jackszis, Annett Klinder, Rainer Bader e Carmen Zietz. "Influence of Metallic Deposition on Ceramic Femoral Heads on the Wear Behavior of Artificial Hip Joints: A Simulator Study". Materials 13, n. 16 (12 agosto 2020): 3569. http://dx.doi.org/10.3390/ma13163569.
Testo completoAbstract (sommario):
Several retrieval studies have reported on metallic depositions on ceramic femoral heads, but the effect on the wear behavior of artificial hip joints has not been investigated in wear simulator studies. In the present study, retrieved ceramic heads with metallic depositions as third particles were tested against cross-linked ultra-high-molecular-weight polyethylene (UHMWPE) liners in a hip wear simulator. The amount of liner wear and expansion of metallic depositions on the heads were determined before and after wear testing with digital microscopy. The surface roughness of the heads was investigated in areas with and without metallic depositions by laser scanning microscopy. After five million load cycles, a non-significant reduction in the metallic formation on the retrieved heads was found. The metallic areas showed a higher surface roughness compared to unconcerned areas. The liners showed a higher wear rate of 1.57 ± 1.36 mg/million cycles for 28 mm heads and 2.42 ± 0.82 mg/million cycles for 36 mm heads with metallic depositions, in comparison with new ceramic heads with a 28 mm size ((−0.06 ± 0.89) mg/million cycles) and 36 mm size ((2.04 ± 0.46) mg/million cycles). Metallic transfer on ceramic heads can lead to an increased surface roughness and higher wear rates at the UHMWPE liners. Therefore, metallic contact of the ceramic femoral head should be avoided.
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Ji, Shi Ming, Ya Min Xu, Guo Da Chen e Ming Sheng Jin. "Comparative Study of Magnetic Abrasive Finishing in Free-Form Surface Based on Different Polishing Head". Materials Science Forum 675-677 (febbraio 2011): 593–96. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.593.
Testo completoAbstract (sommario):
Nowadays, researches concerned magnetic abrasive finishing (MAF) are becoming increasingly popular. Polishing head is one of the most important factors in the whole polishing system in which magnetic abrasive act directly on the workpiece. In this paper, two kinds of polishing heads applied in the polishing of free form surface are proposed. They are hard polishing head and soft polishing head, respectively. And some important factors are contrasted such as selfsharpening capacity, morphology distribution, and removal uniformity. Moreover, the finishing force is the key factor which is different between the two polishing heads having a great influence on polishing effect. Through comparison and analysis, the soft polishing head is better to finish free form surface. And the experimental results reflect its superiority in polishing free form surface.
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Su, J. L., K. Ju e L. Vo. "Side reading study of recording heads". IEEE Transactions on Magnetics 28, n. 5 (settembre 1992): 2722–24. http://dx.doi.org/10.1109/20.179608.
Testo completo
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PAHLAVAN, KOUROSH, e JAN-OLOF EKLUNDH. "HEADS, EYES AND HEAD-EYE SYSTEMS". International Journal of Pattern Recognition and Artificial Intelligence 07, n. 01 (febbraio 1993): 33–49. http://dx.doi.org/10.1142/s0218001493000030.
Testo completoAbstract (sommario):
Active vision systems can be considered as systems that integrate visual sensing and action. Sensing includes detection of actions/events and results also in specific actions/manipulations. This paper mainly addresses the basic issues in the design of a head-eye system for the study of active-purposive vision. The design complexity of such a head is defined by the activeness of the visual system. Although we have not had the motivation to exactly reproduce the biological solutions in a robot, we claim that the designer should carefully consider the solutions offered by evolution. The flexibility of the behavioral pattern of the system is constrained by the mechanical structure and the computational architecture used in the control system of the head. The purpose of the paper is to describe the mechanical structure as well as the computational architecture of the KTH-head from this perspective.
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Gupta, Seema, Anshu Soni e Hitant Vohra. "Additional head of biceps brachii: a cadaveric study". International Journal of Research in Medical Sciences 8, n. 4 (26 marzo 2020): 1237. http://dx.doi.org/10.18203/2320-6012.ijrms20201071.
Testo completoAbstract (sommario):
Background: The biceps brachii is an important muscle of anterior compartment of arm. It shows frequent anatomic variability due to presence of supernumerary heads. Knowledge of the existence of the third head of biceps brachii is important for surgeons. Keeping this in mind a study was planned to see the incidence of additional head of biceps brachii in sample Indian population and to compare it with other racial groups.Methods: The study was carried out on 30 cadaveric upper limbs. The upper limbs were dissected and studied for the presence of additional head of biceps brachii. The attachment and nerve supply of the additional head was carefully observed, recorded and documented.Results: Out of 30 limbs which were dissected, additional head of biceps brachii was found only in two limbs. In both the cases the additional head was present only on the right side and arose from the anterior surface of humerus, superomedial to the origin of brachialis. The additional head fused with the common bulk of the muscle and was inserted into the radial tuberosity and bicipital aponeurosis. The extra heads of biceps brachii muscle received branches from musculocutaneous nerve.Conclusions: Biceps brachii is one of the commonest muscles showing variations. The additional head is not only of academic importance, but its knowledge also helps clinicians in managing fractures of humerus and nerve entrapment.
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Valente, Giuseppe, Brent Lanting, Steven MacDonald, Matthew G. Teeter, Douglas Van Citters e James Howard. "Femoral head material loss at the head-neck junction in total hip arthroplasty: the effect of head size, stem material and stem offset". HIP International 29, n. 6 (30 novembre 2018): 647–51. http://dx.doi.org/10.1177/1120700018814473.
Testo completoAbstract (sommario):
Introduction:Material loss at the head-neck junction in total hip arthroplasty may cause adverse clinical symptoms and implant failure. The purpose of this study was to quantitatively examine the effects of head size, stem material and stem offset on material loss of the head-neck taper interface of a single trunnion design in retrieval implants of metal on polyethylene bearing surfaces.Methods:A retrieval study was performed to identify all 28-mm and 32-mm femoral heads from a single implant/taper design implanted for >2 years. This included n = 56 of the 28-mm heads and n = 23 of the 32-mm heads. The 28-mm femoral heads were matched to 32-mm femoral heads based on time in vivo and head length. A coordinate measuring machine was used to determine maximum linear corrosion depth (MLD). Differences in MLD for head diameter, stem material, and stem offset were determined.Results:There were no differences between groups for age, gender, BMI, or implantation time. There was no difference in MLD between 28 mm and 32 mm matched paired head diameters ( p = 0.59). There was also no difference in MLD between titanium or cobalt-chromium stems ( p = 0.79), and regular or high-offset stems ( p = 0.95).Conclusion:There is no statistical difference in femoral head MLD at the head-neck junction in THA between 28-mm and 32-mm matched paired femoral heads, similar or mixed alloy coupled femoral head stem constructs, and regular or high offset stems.
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Vargas, Emily, Amy Seon Westmoreland, Kathrina Robotham e Fiona Lee. "Counting heads vs making heads count". Equality, Diversity and Inclusion: An International Journal 37, n. 8 (20 novembre 2018): 780–98. http://dx.doi.org/10.1108/edi-11-2017-0256.
Testo completoAbstract (sommario):
Purpose Research on organizational diversity initiatives generally focus on either numerical diversity or racial climate. Both facets of diversity are critical, however, research has rarely examined their impact simultaneously. The paper aims to discuss these issues. Design/methodology/approach In the current study, the authors use the context of higher education, to examine how variations in the composite of numerical diversity and racial climate predict psychological disparities between faculty of color (FOC) and White faculty. The authors test how institutions that engage in authentic diversity (i.e. institutions that are both numerically diverse and have a positive racial climate) compare to other diversity composites. Findings Using a data set of n=37,406 faculty members in US colleges/universities, this study found that racial disparities between FOC and White faculty for various psychological outcomes are smaller in authentic diversity institutions compared to institutions with low numeric diversity/ poor racial climate. Further, the data demonstrate that authentic diversity institutions have reduced psychological disparities compared to institutions with high numeric diversity/poor racial climate, but have similar disparities to institutions with low numeric/positive racial climate. Originality/value These results suggest that diversity climate may be the primary driver of mitigating psychological disparities between FOC and White faculty. However, it is necessary for institutions to authentically engage in diversity – by promoting both entities – to become more effective in reducing disparities.
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Shi, Baogui, J. L. Sullivan, M. A. Wild e S. O. Saied. "Study of Generation Mechanism of Three-Body Particles in Linear Tape Recording". Journal of Tribology 127, n. 1 (1 gennaio 2005): 155–63. http://dx.doi.org/10.1115/1.1843156.
Testo completoAbstract (sommario):
A major cause of magnetic spacing losses in data tape systems is pole tip recession (PTR). This study is an investigation of PTR in a linear data tape recording system and identification of the mechanisms responsible for these effects, but the results have implications for any head where the tape bearing surface is Al2O3/TiC, AlTiC. Tape cycling experiments were performed using the linear tape open system as the experimental platform with metal particle tape. All experiments were conducted within a matrix of pressure and humidity, which encompassed the system operating extremes. Atomic force microscopy was used to analyze the surface topography of the heads. Auger electron spectroscopy and x-ray photoelectron spectroscopy were employed to analyze the chemical changes on the surface of the heads and tapes. Environment was found to have a significant influence on the head/tape interface. Head wear and PTR was highest at high temperature and humidity. Water vapor was found to transform the surface layers on the TiC grains in the tape-bearing surface to TiO2. This process results in the production of TiO2 fragments that become trapped in the recessed pole tip region, acting as three-body abrasive particles. The TiO2 present on the TiC grains and on the surface of heads increases with the water content after cycling against tapes. The hypothesis is supported by the presence of Ti on the poles.
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de Cesar Netto, Cesar, Alexandre Leme Godoy-Santos, Taylor N. Cabe, Lauren Roberts, Thos Harnroongroj, Ashraf Fansa, Jonathan Deland e Mark Drakos. "The Use of Polyvinyl Alcohol Hydrogel Implants in the Lesser Metatarsal Heads. Is it Safely Doable? A Cadaveric Study". Foot & Ankle Orthopaedics 4, n. 4 (1 ottobre 2019): 2473011419S0016. http://dx.doi.org/10.1177/2473011419s00160.
Testo completoAbstract (sommario):
Category: Lesser Toes, Midfoot/Forefoot Introduction/Purpose: The treatment of lesser toe metatarsophalangeal joint (MTPJ) arthritis is challenging, and surgical options are scarce. The use synthetic polyvinyl alcohol hydrogel implants in the treatment of the lesser MTPJ arthritis may provide symptomatic relief. An essential technical limitation is that only 8 mm and 10 mm implants are currently available, potentially limiting their use in the lesser metatarsals. The objective of this cadaveric study was to evaluate the average dimensions of the lesser metatarsal heads using CT scans and anatomical dissections, and to perform progressive drilling of the heads, aiming to assess the largest implant dimension that would be safely introduced into the metatarsal heads, preserving an adequate bone rim and providing stability to the implant. Methods: Ten cadaveric specimens were used. Surgical procedures were performed by a single fellowship-trained foot and ankle surgeon. Height and width of all lesser metatarsals were measured on CT and during anatomic dissection. Heads of all five metatarsal were exposed. Sequential reaming of the 2nd to 4th metatarsals with 0.5 mm increments was then performed. Once a minimum 6 mm reaming was obtained, the thickness of the surrounding bone rim (dorsal, plantar, medial and lateral) was measured using a precision caliper after each reaming increment. Maximum reaming size, largest implant inserted (8 mm or 10 mm), and the presence of failure of the metatarsal head or instability of the implant were recorded. Metatarsal head sizes were compared by Wilcoxon Rank Sum Test. Multiple regression analysis evaluated measurements that influenced the maximum reaming and implant size. Correlation between CT and anatomical measurements were evaluated by intraclass correlation (ICC). P-values of less than 0.05 were considered significant. Results: CT and anatomical measurements demonstrated significant correlation (ICC range, 0.63 to 0.85). Mean values for height and width of the metatarsal heads were respectively: second (14.9 mm and 9.9 mm), third (14.8 mm and 8.8 mm), fourth (14.0 mm and 8.7 mm) and fifth (12.3 mm and 9.3 mm). All the second, third and fourth metatarsal heads could be safely drilled up to 7.5 mm, preserving an intact bone rim. At 80% of the time, the heads could be safely drilled up to 8.0 mm. Height of the metatarsal heads was the only factor to significantly influence the size of maximum reaming and implant introduced. In respectively 20%, 40% and 50% of the second, third, and fourth metatarsal heads, neither 8 mm nor 10 mm PVAH implants could be used. Conclusion: Our cadaveric study found that the even though the majority of the lesser metatarsal heads could be safely drilled up to 8 mm, the smallest PVAH implant size currently available in most countries (8 mm) could be inserted in most of the second, but only in about half of the third and fourth metatarsal heads. The remaining bone rim around inserted implants was considerably thin, usually measuring less than 1 mm. In order to optimize the use PVAH in lesser metatarsal heads, smaller implant options are needed.
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Eberhardt, Alan W., R. Travis McKee, John M. Cuckler, Donald W. Peterson, Preston R. Beck e Jack E. Lemons. "Surface Roughness of CoCr and ZrO2Femoral Heads with Metal Transfer: A Retrieval and Wear Simulator Study". International Journal of Biomaterials 2009 (2009): 1–6. http://dx.doi.org/10.1155/2009/185456.
Testo completoAbstract (sommario):
Metal transfer to femoral heads may result from impingement against the metallic acetabular shell following subluxation/dislocation, or when metallic debris enters the articulation zone. Such transfers roughen the head surface, increasing polyethylene wear in total hip replacements. Presently, we examined the surface roughness of retrieved femoral heads with metallic transfer. Profilometry revealed roughness averages in regions of metal transfer averaging 0.380 m for CoCr and 0.294 m for which were one order of magnitude higher than those from non-implanted controls. Scanning electron microscopy (SEM) revealed adherent transfers on these retrievals, with titanium presence confirmed by electron dispersive spectroscopy. Due to the concern for increased wear, metal transfer was induced on non-implanted heads, which were then articulated against flat polyethylene discs in multidirectional sliding wear tests. Increased polyethylene wear was associated with these specimens as compared to unaltered controls. SEM imaging provided visual evidence that the transfers remained adherent following the wear tests. Pre- and post-test roughness averages exceeded 1 m for both the CoCr and heads. Overall, these results suggest that metal transfer increases the surface roughness of CoCr and femoral heads and that the transfers may remain adherent following articulation against polyethylene, leading to increased polyethylene wear.
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Li, Liu, Jiang e Yan. "Proximate Composition and Nutritional Profile of Rainbow Trout (Oncorhynchus mykiss) Heads and Skipjack tuna (Katsuwonus Pelamis) Heads". Molecules 24, n. 17 (2 settembre 2019): 3189. http://dx.doi.org/10.3390/molecules24173189.
Testo completoAbstract (sommario):
In order to evaluate the application potential of rainbow trout (Oncorhynchus mykiss) heads and skipjack tuna (Katsuwonus pelamis) heads; proximate composition, amino acids, fatty acids, carnosine, and anserine contents were analyzed in this study. Rainbow trout heads showed significantly higher protein (29.31 g/100 g FW, FW is abbreviation of fresh weight) and lipid (6.03 g/100 g FW) contents than skipjack tuna heads (18.47 g/100 g FW protein and 4.83 g/100 g FW lipid) (p < 0.05). Rainbow trout heads and skipjack tuna heads exhibited similar amino acid composition. Essential amino acids constituted more than 40% of total amino acids in both rainbow trout head and skipjack tuna head. The fatty acid profile was different between rainbow trout heads and skipjack tuna heads. Rainbow trout heads mainly contained 38.64% polyunsaturated fatty acids (PUFAs) and 38.57% monounsaturated fatty acids (MUFAs), whereas skipjack tuna heads mainly contained 54.46% saturated fatty acids (SFAs). Skipjack tuna heads contained 4563 mg/kg FW anserine and 1761 mg/kg FW carnosine, which were both significantly higher than those of rainbow trout heads (p < 0.05). These results demonstrate that both rainbow trout heads and skipjack tuna heads may be used as materials for recycling high-quality protein. Meanwhile, rainbow trout heads can be used to extract oil with high contents of unsaturated fatty acids, while skipjack tuna heads may be a source for obtaining carnosine and anserine.
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Pamin, Katarzyna, Jan Połtowicz, Joanna Kiełkowicz e Andrzej Hendrich. "Interaction of metalloporphyrins with lipid bilayers, a calorimetric study". Current Topics in Biophysics 34, n. 1 (1 gennaio 2011): 11–14. http://dx.doi.org/10.2478/v10214-011-0002-5.
Testo completoAbstract (sommario):
Interaction of metalloporphyrins with lipid bilayers, a calorimetric studyThe interaction of three metalloporphyrins, containing manganese, iron and cobalt atoms, with lipid bilayers composed of neutral (DPPC) or charged (DMPG) phospholipids were studied by means of scanning differential calorimetry. We found only minute effects exerted by studied compounds on DPPC, while phase transitions of charged DMPG were seriously affected by porphyrins. Analysis of experimental data revealed that due to the electrostatic interactions DMPG bilayers are perturbed not only in the polar head group region. Putative rearrangements of the polar heads packing affects also the acyl chain region of this lipid bilayer. Perturbation of DMPG polar heads induced by porphyrin in complex with manganese atoms is bigger than that induced by other porphyrins.
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Idrees, Ammar I. "Optimization of Asymmetric Magnetic Recording Heads Inclination Angle and Study the Characteristics for a Higher Bit Density Recording of HDD". Science Journal of University of Zakho 6, n. 4 (30 dicembre 2018): 166–70. http://dx.doi.org/10.25271/sjuoz.2018.6.4.544.
Testo completoAbstract (sommario):
This paper study the optimization of the asymmetric magnetic recording heads, the calculations demonstrate sharp field gradient performance for both the horizontal, and vertical field components for this type magnetic recording heads at large inclination and small distance between the head and underlayer. In addition, the characteristics for a higher bit density recording of HDD have been studied. These characteristics can be utilized to raise bit density in both recording method conventional and vertical, respectively.
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FUNG, CAT H. M., e GLADYS TANG. "Code-blending of functional heads in Hong Kong Sign Language and Cantonese: A case study". Bilingualism: Language and Cognition 19, n. 4 (9 febbraio 2016): 754–81. http://dx.doi.org/10.1017/s1366728915000747.
Testo completoAbstract (sommario):
In analyzing code-switching in spoken languages, Chan (2003, 2008) proposes that only functional heads with their associated language determine the order of the complement. In this paper, we examine whether Chan's analysis can account for code-blending in Hong Kong Sign Language (HKSL) and Cantonese by a deaf child (2;0.26–6;6.26) and three deaf adult native signers. HKSL and Cantonese differ in head directionality so far as the functional elements of modals, negators, and auxiliaries are concerned. They are head-final in HKSL but head-initial in Cantonese. The HKSL–Cantonese code-blending data in this study largely conform to Chan's analysis, where the order of the complement is determined by which language the functional head appears in. However, code-blending the functional heads of a similar category in both languages leads to either order of the complement. Also, the deaf child's apparent violations of adult HKSL grammar reveal crosslinguistic influence from Cantonese to HKSL during code-blending.
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Han, Yavuz, Galip Bakır, Şahin Tez e Polat İpek. "GAP Uluslararası Tarımsal Araştırma ve Eğitim Merkezi Çalışma Sahasına Giren İllerdeki Sığır Cinsi Hayvan Varlığı". Turkish Journal of Agriculture - Food Science and Technology 2, n. 5 (21 maggio 2014): 214. http://dx.doi.org/10.24925/turjaf.v2i5.214-219.110.
Testo completoAbstract (sommario):
In this review, the share in total and the presence of cattle in provinces of GAPUTAEM has been referred. According to official data of 2012 of TUIK, when number of cattle was 11.972.923 heads in 1991, in 2012 years increased 13.914.912 heads. According to year of 1991, number of cattle increased 16%. In our country, the number of Anatolian Water Buffalo declined from 366.150 heads to 107.435 heads during 1991-2012 and this reduction is 70.6%. 15.977.838 tons milk was obtained from dairy cattle of 5.431.400 heads and average milk yield was 2.942 kg/head. 46.989 tons milk was produced from 46.959 heads of Anatolian Water Buffaloes and average milk yield was 1.006 kg/head. However, there were totally cattle of 1.173.008 heads in study field of Institute. 1.098.895 tons milk was produced from cattle of 451.039 heads. Totally, there were 15.478 heads Anatolian Water Buffaloes in 11 provinces. 6.384 tons milk was produced from 6.738 heads Anatolian Water Buffaloes in 2012. Across the country, despite cattle (domestic) decreased, cattle (cross-bred) and cattle (culture) had increased. The possibility of breeding of native cattle should be investigated. Also, growers and technical staffs should be trained that affected by entering of culture breeds.
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Su, Jun, e Xiao Jing Li. "Design Method for Sealing Head of Internal Pressure Vessels in Chemical Industry". Advanced Materials Research 461 (febbraio 2012): 17–20. http://dx.doi.org/10.4028/www.scientific.net/amr.461.17.
Testo completoAbstract (sommario):
As an important apparatus of pressure vessel, sealing head, has an important role in petroleum industry, chemical industry and atomic energy industry. Sealing head of internal pressure vessels can be divided into three main types, which are convex head, conical needles head, flat head, respectively. Different heads have different calculating method to get the basic parameters and the most design formula of heads are established on the basis of membrane of the stress, and add the stress enhancement factor into the formula for the stress of the edge.therefore. In this study, the author have listed the calculating equations of the typical heads. At last, the author puts forward an example of head calculation to demonstrate the design method
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Ali, Md Asraf, Kenneth Sundaraj, R. Badlishah Ahmad, Nizam Uddin Ahamed, Md Anamul Islam e Sebastian Sundaraj. "Muscle Fatigue in the Three Heads of the Triceps Brachii During a Controlled Forceful Hand Grip Task with Full Elbow Extension Using Surface Electromyography". Journal of Human Kinetics 46, n. 1 (1 giugno 2015): 69–76. http://dx.doi.org/10.1515/hukin-2015-0035.
Testo completoAbstract (sommario):
AbstractThe objective of the present study was to investigate the time to fatigue and compare the fatiguing condition among the three heads of the triceps brachii muscle using surface electromyography during an isometric contraction of a controlled forceful hand grip task with full elbow extension. Eighteen healthy subjects concurrently performed a single 90 s isometric contraction of a controlled forceful hand grip task and full elbow extension. Surface electromyographic signals from the lateral, long and medial heads of the triceps brachii muscle were recorded during the task for each subject. The changes in muscle activity among the three heads of triceps brachii were measured by the root mean square values for every 5 s period throughout the total contraction period. The root mean square values were then analysed to determine the fatiguing condition for the heads of triceps brachii muscle. Muscle fatigue in the long, lateral, and medial heads of the triceps brachii started at 40 s, 50 s, and 65 s during the prolonged contraction, respectively. The highest fatiguing rate was observed in the long head (slope = −2.863), followed by the medial head (slope = −2.412) and the lateral head (slope = −1.877) of the triceps brachii muscle. The results of the present study concurs with previous findings that the three heads of the triceps brachii muscle do not work as a single unit, and the fiber type/composition is different among the three heads.
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P.M, Radhika, Anupama K e Shailaja Shetty. "A CADAVERIC STUDY OF ACCESSORY HEADS OF BICEPS BRACHII IN SOUTH INDIAN POPULATION". International Journal of Anatomy and Research 5, n. 1.2 (28 febbraio 2017): 3491–95. http://dx.doi.org/10.16965/ijar.2016.507.
Testo completo
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Fanani, Zaenal. "FAKTOR-FAKTOR YANG MEMENGARUHI PARTISIPASI MASYARAKAT DALAM PENGANGGARAN DAN PENDAPATAN ASLI DESA". EKUITAS (Jurnal Ekonomi dan Keuangan) 2, n. 3 (6 agosto 2019): 385–403. http://dx.doi.org/10.24034/j25485024.y2018.v2.i3.4038.
Testo completoAbstract (sommario):
The purpose of this study was to examine the influence of village characteristics factors, leadership styles, political legitimacy, access to information, and village head motivation on community participation in village budgeting and to examine the effect of community participation in budgeting on village original revenues. The population of this study is the village head of all villages in East Java Province, the sample is 100 village heads. Data analysis techniques used to test the hypothesis using Structural Equation Modeling (SEM) with software Wrap-PLS 5.0. The result of the research shows that the factor of political legitimacy influences the motivation of village head, the character of the village influences the participation of the society in budgeting in the village. Factors of leadership style, political legitimacy, and access to information, have no effect on the village head's motivation. Factors of leadership style, political legitimacy, and access to information, and the motivation of village heads do not influence public participation in village budgeting. Public participation in budgeting has an effect on the original income of the village.
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Seynnaeve, M. C., R. Sarrazyn, C. Vanderschelden e A. Calus. "STUDY ON RED DISCOLORATION OF CHICORY HEADS". Acta Horticulturae, n. 511 (gennaio 2000): 89–98. http://dx.doi.org/10.17660/actahortic.2000.511.10.
Testo completo
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Zhang, Jing, Ningping Tao, Yueliang Zhao, Xichang Wang e Mingfu Wang. "Comparison of the Fatty Acid and Triglyceride Profiles of Big Eye Tuna (Thunnus obesus), Atlantic salmon (Salmo salar) and Bighead Carp (Aristichthysnobilis) Heads". Molecules 24, n. 21 (4 novembre 2019): 3983. http://dx.doi.org/10.3390/molecules24213983.
Testo completoAbstract (sommario):
Big eye tuna (Thunnus obesus), Atlantic salmon (Salmo salar) and bighead carp (Aristichthys nobilis) are three representative marine and fresh water fishes. In this study, the content of total lipids (TL), triglyceride (TG) fraction, and the fatty acid profiles in the corresponding fish heads were analyzed. Meanwhile, their complicated TG molecular species were further characterized. The results showed that TG was the major lipid in these three fish heads (60.58–86.69%). Compared with other two fish heads, big eye tuna head was the most abundant in polyunsaturated fatty acids, among which eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) accounted for 64.29% and 32.77% in the TL and TG fraction, respectively. It is also worth noting that EPA+DHA/total fatty acid (TFA) value of TL and TG fraction from bighead carp head showed no significant difference with Atlantic salmon head, a typical marine fish. There were 146 TG molecules detected in big eye tuna head, 90 in Atlantic salmon and 87 in bighead carp heads. DHA or EPA accounted for 56.12%, 22.88%, and 5.46% of the total TG molecules in these three fish heads, respectively. According to principal component analysis, orthogonal projection to latent structures-discriminant analysis and the constructed heat map, the three samples could be completely differentiated based on their TG molecule fingerprints. This study is the first to compare marine and fresh water fish from the perspective of their heads’ fatty acid and TG molecule profiles.
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Ragan, James F., e Qazi Najeeb Rehman. "Earnings Profiles of Department Heads: Comparing Cross-Section and Panel Models". ILR Review 49, n. 2 (gennaio 1996): 256–72. http://dx.doi.org/10.1177/001979399604900205.
Testo completoAbstract (sommario):
Academics who become department heads suffer declining research skills because of time spent performing administrative tasks, and this skill depreciation slows future wage growth. This study examines Kansas State University faculty who served as department heads during the period 1965–92. Cross-section estimates of the compensation for serving as department head are biased upward because of a correlation between unmeasured productivity characteristics and selection as department head. To correct for this bias, the authors reestimate earnings equations using a panel model that incorporates personal fixed effects. Although the average department head in the sample received a wage premium of 12%, the premium for past administrative service had completely disappeared for the typical former head. Another finding is that skill depreciation was most severe and wage growth most adversely affected in the sciences. As compensation, department heads in the sciences received a larger initial administrative premium than did other department heads.
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Jiang, Xiaojin, Enheng Wang, Xiangwei Chen, Xiangyou Xia e Changting Shi. "Field study on macropore flow in typical Black soils of northeast China". Canadian Journal of Soil Science 92, n. 3 (marzo 2012): 559–66. http://dx.doi.org/10.4141/cjss2010-041.
Testo completoAbstract (sommario):
Jiang, X., Wang, E., Chen, X., Xia, X. and Shi, C. 2012. Field study on macropore flow in typical Black soils of northeast China. Can. J. Soil Sci. 92: 559–566. Macropores are important preferential pathways for the transport of water and contaminants in soil. A series of hood infiltration experiments were conducted using dye tracers (Brilliant Blue FCF) at pressure heads of −5.0 cm, −3.0 cm, and −1.0 cm at a conventional tilled site on Keshan Farm, northeast China. The study objective was to combine the test method of dye tracing with a hood infiltrometer to analyze soil subjected to conventional tillage methods. Dye staining patterns and macroporous networks were analyzed by excavation, mapping, photography, and image analysis. Results showed that macropore flow began very near the soil surface under three pressures heads of −5.0 cm, −3.0 cm and −1.0 cm, and that a pressure head of −1.0 cm resulted in more lateral flow. Soil deeper than 40.0 cm was less disturbed, which resulted in good continuity. At pressure heads of −5.0, −3.0 and −1.0 cm, the dye staining technique resulted in maximum stained depths of 74.3, 60.7 and 64.7 cm, respectively, with maximum stained widths of 41.6, 41.5 and 47.9 cm, respectively (at depths from 14.0 to 28.0 cm). Soil under a pressure head of −1.0 cm had the highest initial and steady infiltration rates of 13.0 and 4.1 mm min−1, respectively. Soil under a pressure head of −5.0 cm showed the most connectivity. To distinguish the macropores from the interaction area of macropore flow and the soil matrix surrounding the macropores, the stained area was separated into different classes based on dye color.
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Wazeer, Adil, e Kaushalendra Kumar Dubey. "Study of Effect of Altered Piezometric Heads in Experimental Investigation of Bernoulli’s Equation". Asian Journal of Engineering and Applied Technology 8, n. 2 (5 maggio 2019): 16–18. http://dx.doi.org/10.51983/ajeat-2019.8.2.1129.
Testo completoAbstract (sommario):
Bernoulli’s equation is found to be one of the most popular topics of the elementary physics. The paper presents the experimental behavior of the famous Bernoulli’s equation when the piezometric heads are altered and varied with respect to the heads 10cm and 15cm. The value of h in centimeters have been recorded in altered time periods and heads and in all the nine tubes. The calculation of the total energy (E) by changing the heads is obtained and the results achieved while equating the graphs between the total energy and distance from the reference point by changing the heads has been computed.
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Aulawi, Aulawi, Riris Andono Ahmad e Mubasysyir Hasanbasri. "Peran kepala puskesmas SKM dan non SKM dalam meningkatkan kemampuan manajerial puskesmas di kabupaten Oku Timur". Berita Kedokteran Masyarakat 32, n. 9 (30 marzo 2018): 339. http://dx.doi.org/10.22146/bkm.7552.
Testo completoAbstract (sommario):
Role of the head of public health centers from public health graduates and others on improving managerial skills in East OkuPurposeThis study aimed to understand how public health and non-public health backgrounds affect management skill of primary health care heads, based on ten managerial roles. MethodsThis study was a descriptive study with case-series method, using qualitative methods supported by quantitative data. Eight people were recruited as respondents. They consisted of 4 people that were primary healthcare heads with public health background and 4 people that were primary healthcare heads with non-public health background. Respondents were recruited by purposive sampling. Data collection was performed using in-depth interviews and questionnaire. ResultsPrimary healthcare head with public health background owned more work experience than those with non-public health background. Period of employment in primary health care had an influence on managerial capabilities. There were no significant differences of period of employment in primary health care head positions among the longest with the least to the managerial capabilities. Primary health care heads who had been trained with PIM IV training and other structural positions were known to have better management capabilities, especially compared to the leadership role of those who had not been trained.ConclusionThere was no significant difference in managerial capacity between primary health care heads with public health and those with non-public health background.
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PJ, Fr Thomas, e G. Visvanathan. "Leadership Behaviour Of The Heads Of Higher Secondary Schools In Kerala". Ushus - Journal of Business Management 8, n. 2 (10 giugno 2009): 46–54. http://dx.doi.org/10.12725/ujbm.15.5.
Testo completoAbstract (sommario):
Leadership is the ability to inspire confidence and support individuals who need to achieve administrative goals. Leading is the major role of the Head of an institution. Leadership is expected to deal with change, inspiration, motivation, and influence. Task and relational behaviours of the Heads of higher secondary schools should equally be embedded for effective administration. Therefore an attempt has been made to ascertain the leadership behaviour of the Heads of higher secondary schools in Kerala. The investigators used simple random sampling technique for selecting the sample of 1500 higher secondary school teachers to study the leadership behaviour of the Heads. The main objective of the study is to find out whether there is any significant difference in respect of leadership behaviour of Heads of higher secondary schools with respect to gender, locality and type of management. This study revealed that there is significant difference between male and female Heads of higher secondary schools with respect to their leadership behaviour and no significant difference is found between rural and urban Heads, government and private higher secondary school Heads with respect to the leadership behaviour. It is found that male heads of higher secondary schools have higher leadership behaviour. Therefore female heads of higher secondary schools should be suitably trained for effective leadership behaviour
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Beier, Simon, Martin Kutrib, Andreas Malcher e Matthias Wendlandt. "Diving into the queue". RAIRO - Theoretical Informatics and Applications 52, n. 2-3-4 (aprile 2018): 89–110. http://dx.doi.org/10.1051/ita/2018009.
Testo completoAbstract (sommario):
We introduce and study the model of diving queue automata which are basically finite automata equipped with a storage medium that is organized as a queue. Additionally, two queue heads are provided at both ends of the queue that can move in a read-only mode inside the queue. In particular, we consider suitable time constraints and the case where only a finite number of turns on the queue is allowed. As one main result we obtain a proper queue head hierarchy, that is, two heads are better than one head, and one head is better than no head. Moreover, it is shown that the model with one queue head, finitely many turns, and no time constraints as well as the model with two queue heads, possibly infinitely many turns, and time constraints is captured by P and has a P-complete membership problem. We obtain also that a subclass of the model with two queue heads is already captured by logarithmic space. Finally, we consider decidability questions and it turns out that almost nothing is decidable for the model with two queue heads, whereas we obtain that at least emptiness and finiteness are decidable for subclasses of the model with one queue head.
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Cong, T. C. "Study the Coefficient of Energy Transfer from Hammer to Pile Driven in Two Layers Foundation Base, Pile Bearing Side Friction q1#q2 Pile Bottom Encounters Constant Resistance". Applied Mechanics and Materials 427-429 (settembre 2013): 195–99. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.195.
Testo completoAbstract (sommario):
This paper consider the collision of hammer to pile driven into two layers foundation base, piles bearing side friction q1 ≠ q2, applies the theoretical basis of longitudinal collision of elastic bars and method of wave propaganda DAlember, determine the velocity of pile heads in the time interval, compress work of elastic buffering on pile head, from the calculation of coefficient of energy transfer from hammer to pile, choosing pile head buffering and hammer heads according to the coefficient of energy transfer calculated.
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Mehta, D. K., Tarun Singh e Rajesh Kanwar. "Effect of head decapitation and planting density on quality seed production of sprouting broccoli (Brassica oleracea var. italica L.)". Journal of Applied and Natural Science 7, n. 1 (1 giugno 2015): 471–76. http://dx.doi.org/10.31018/jans.v7i1.634.
Testo completoAbstract (sommario):
A study was carried out to evaluate the effect of head decapitation and planting density on plant growth, seed yield and quality of sprouting broccoli, Brassica oleracea var. italica L. using cultivar ‘Green Head’. The twenty treatments comprised of combinations of four head decapitation methods viz., D1 (decapitation of primary head at appearance and harvesting seeds from secondary heads), D2 (decapitation of primary head at marketable stage and harvesting seeds from secondary heads), D3 (removal of secondary heads at appearance and harvesting seeds primary head) and ‘D4’ (No decapitation- control) and five planting densities viz., S1 (60x60 cm), S2 (60x45 cm), S3(45x45 cm), S4 (60x30 cm), and S5 (45x30 cm). Decapitation of primary head at appearance and harvesting seeds from secondary heads (D1) and planting density S3 (45x45 cm) independently as well as in combination gave highest seed yield per plot and per hectare. This combination was also found comparable to other combinations for other characters like days to 50% flowering, days to seed harvesting, plant height at harvesting (cm), number of branches per plant, number of siliqua per plant, siliqua length (cm), number of seeds per siliqua and seed quality parameters. Therefore, it is suggested that decapitation of primary head at appearance and harvesting seeds from secondary heads (D1) in combination with plant spacing of 45x45 cm i.e. D1S3 can be recommended for commercial seed production of sprouting broccoli.
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Affatato, S., E. Ghisolfi, G. L. Cacciari e A. Toni. "Alumina Femoral Head Fracture: An in Vitro Study". International Journal of Artificial Organs 23, n. 4 (aprile 2000): 256–60. http://dx.doi.org/10.1177/039139880002300408.
Testo completoAbstract (sommario):
A fracture of a ceramic femoral head is reported in this study. Fractures of ceramic femoral heads are uncommon and reports on this complication are rare. After 3 million cycles, on a twelve station hip simulator that tested alumina femoral head against polyethylene acetabular cup, fracture of the ceramic ball was observed. The retrieved specimen consisted of three large ceramic fragments from the same ceramic femoral head, a polyethylene acetabular cup and a stainless steel jig. Careful and detailed examination of the removed components was made. The fracture of the ceramic ball resulted in damage to the metal taper of the jig component which was fixed into the simulator.
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Hernández-Cortés, Pedro, Alberto Monje, Pablo Galindo-Moreno, Andrés Catena, Inmaculada Ortega-Oller, José Salas-Pérez, Francisco Mesa et al. "AnEx VivoModel in Human Femoral Heads for Histopathological Study and Resonance Frequency Analysis of Dental Implant Primary Stability". BioMed Research International 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/535929.
Testo completoAbstract (sommario):
Objective. This study was designed to explore relationships of resonance frequency analysis (RFA)—assessed implant stability (ISQ values) with bone morphometric parameters and bone quality in anex vivomodel of dental implants placed in human femoral heads and to evaluate the usefulness of this model for dental implant studies.Material and Methods. Thisex vivostudy included femoral heads from 17 patients undergoing surgery for femoral neck fracture due to osteoporosis (OP) (n=7) or for total prosthesis joint replacement due to severe hip osteoarthrosis (OA) (n=10). Sixty4.5×13 mm Dentsply Astra implants were placed, followed by RFA. CD44 immunohistochemical analysis for osteocytes was also carried out.Results. As expected, the analysis yielded significant effects of femoral head type (OA versus OA) (P<0.001), but not of the implants (P=0.455) or of the interaction of the two factors (P=0.848). Bonferroni post hoc comparisons showed a lower mean ISQ for implants in decalcified (50.33±2.92) heads than in fresh (66.93±1.10) or fixated (70.77±1.32) heads (bothP<0.001). The ISQ score (fresh) was significantly higher for those in OA (73.52±1.92) versus OP (67.13±1.09) heads. However, mixed linear analysis showed no significant association between ISQ scores and morphologic or histomorphometric results (P>0.5in all cases), and no significant differences in ISQ values were found as a function of the length or area of the cortical layer (bothP>0.08).Conclusion. Although RFA-determined ISQ values are not correlated with morphometric parameters, they can discriminate bone quality (OP versus OA). Thisex vivomodel is useful for dental implant studies.
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Tung, Tiffiny A., e Kelly J. Knudson. "Childhood Lost: Abductions, Sacrifice, and Trophy Heads of Children in the Wari Empire of the Ancient Andes". Latin American Antiquity 21, n. 1 (marzo 2010): 44–66. http://dx.doi.org/10.7183/1045-6635.21.1.44.
Testo completoAbstract (sommario):
AbstractThis study examines isolated child skeletal remains from ritual structures at the Wari site of Conchopata (A.D. 600–1000) to evaluate how they were modified into trophy heads and whether the children were sacrificed. The skeletal remains represent at least seven children. Strontium isotope ratios are examined to determine whether children were taken from foreign locales. Results show that the children’s skulls exhibit a hole on the apex of the cranium and on the ascending ramus of the mandible, identical to the adult Wari trophy heads. At least one child may have been sacrificed.87Sr/86Sr demonstrate that two of the four sampled child trophy heads were nonlocal, suggesting that children were occasionally abducted from distant communities, perhaps for sacrifice and certainly to transform some into trophy heads. The similar child and adult trophy heads suggest that the ritual treatment of children was not uniquely designed, at least as it related to their processing, display, and destruction. Furthermore, it is suggested that the child trophy heads were not simply passive symbols of pre-existing authority by the head-takers and trophy head-makers. The trophy heads simultaneously imbued those agents with authority—they did not merely reflect it—demonstrating the “effective agency” of the trophy head objects themselves. Finally, we suggest that prisoner-taking and trophy head-making by military and ritual elites served to legitimate the authority of those individuals while simultaneously serving larger state goals that enhanced Wari state authority and legitimated its policies and practices.
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Aballa, Andrew Okoth. "Tungiasis in Western Kenya: Knowledge, Perceptions, and Practices of Household Heads – A Crossectional Study". Matters of Behaviour 8, n. 9 (26 marzo 2019): 7–13. http://dx.doi.org/10.26455/mob.v8i9.52.
Testo completoAbstract (sommario):
Background: According to reports of AHADT Kenya, tungiasis afflicts four million Kenyans with 10 million more at risk of severe infestation. Anecdotal reports suggest that lack of knowledge and retrogressive beliefs and practices of household heads, them being the key decision makers in rural homes, might be barriers to the control of tungiasis.
Objective: To assess the knowledge, perceptions, and practices of household heads regarding tungiasis in Kenya
Methodology: A crossectional study was done in Otwenya Location, Maseno Division, Kenya. Seventy-eight (78) homes were visited and all their household members checked for the presence of tungiasis. Structured pretested questionnaires were used to collect the socio demographic data of household heads and the knowledge, perceptions, and practices around tungiasis evaluated. Data analysis was done using version 21 of the Statistical Package for Social Scientists (SPSS) software. A modified technique by Memon et al. was used to compute the knowledge and attitude scores. Fisher’s exact test with Cochran Mantel Haenszel statistics was used for data analyses at 95% CI.
Results: Our data was collected in Urudi Rata (39.7%), Mbeka (35.6%), and Mariwa (24.4%) villages. Most houses had iron sheer roofs (93.6%) and floors plastered with dung or cement (60.3%). Household heads were mainly female (71.8%) with primary level education (67.9%). Tungiasis was found in 39.7% of households. Earth floors (OR=11.1, P<0.01) and overcrowding (OR=3.4, p=0.04) were risk factors for tungiasis. Most respondents (75.7%) had a moderate knowledge of tungiasis with it being lowest among heads with no formal education (OR=35.56 (1.7 to 732.6), p=0.02). The knowledge of tungiasis did not influence its occurrence in homes. (p=0.49). Most respondents (82.1%) had poor perceptions of tungiasis, which did not vary by the age, education, and gender of household. However, odds of infestation was over 4.9 times higher in homes where household head had negative perception of tungiasis (OR=4.9 p=0.03). The extraction of fleas (91.1%) was the commonest treatment option.
Conclusion: Tungiasis is a common ectoparasitosis in rural Kenya with a prevalence of 19.5%. Household heads are knowledge about tungiasis. However, retrogressive beliefs, negligence, and stigma are barriers for its control.
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Sonawane, Pundalik Krishna. "Comparative study between unengaged and engaged fetal head in primigravida at term or in labour". International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, n. 11 (25 ottobre 2018): 4569. http://dx.doi.org/10.18203/2320-1770.ijrcog20184509.
Testo completoAbstract (sommario):
Background: The aim of the study is to compare and evaluate between unengaged (UE) and engaged (E) groups at term or in labour, incidence of unengaged and engaged heads, need for medical or surgical intervention, progress of labour and feto-maternal outcome.Methods: It is a prospective comparative study carried at tertiary care hospital for a period of 18mths from May16-November17. Out of 377 patients, 100 patients were selected in each group with unengaged (group A) and engaged (group B) heads. Patients consent, and ethical approval was taken. History, examination and investigation was done at each visit. Incidence of unengaged heads at term or in labour, duration of each phase of labour and its partographic analysis, need for medical or surgical intervention, mode of delivery and fetomaternal outcome was calculated.Results: Incidence of unengaged heads at term is 61%. 17% patients in unengaged group as compared to 10% required induction of labour while 73(73%) patients in unengaged group required augmentation with oxytocin as compared to 36(36%) patients in engaged group. Duration of labour in each phase was more in unengaged group. Incidence of lower segment caesarean section (LSCS) was 37% in unengaged group as compared to 23% in engaged group. Fetomaternal morbidity which was higher in unengaged was documented.Conclusions: Although with unengaged head being a significant risk factor for LSCS, with watchful expectancy and careful intervention, most patients will deliver vaginally with minimal fetomaternal morbidity.
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Abhash, Amiya, e K. K. Pandey. "Numerical Study of Discharge-Head Relationship of Piano Key Weirs for Low Heads". Water Resources 48, n. 2 (marzo 2021): 235–44. http://dx.doi.org/10.1134/s0097807821020020.
Testo completo
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Surapuramath, Dr Kotreshwaraswamy A. "A Study on Leadership Behavior of Heads of Colleges of Education of Bangalore District". Indian Journal of Applied Research 3, n. 11 (1 ottobre 2011): 146–47. http://dx.doi.org/10.15373/2249555x/nov2013/49.
Testo completo
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Hussain, Ishtiaq, Nabi Bux Jumani e Qaiser Suleman. "Occupational Stress among Secondary School Heads: A Gender Based Comparative Study". Journal of Education and Educational Development 5, n. 2 (13 dicembre 2018): 240. http://dx.doi.org/10.22555/joeed.v5i2.2363.
Testo completoAbstract (sommario):
<p><em>The purpose of the study was to examine and compare the occupational stress of male and female secondary-school-heads in Khyber Pakhtunkhwa. All the male and female secondary school heads working in pubic secondary schools of Khyber Pakhtunkhwa constituted the population of the study. A total of 402 secondary school heads were selected as sample through multistage sampling technique in which 260 were males and 142 were females. Descriptive and quantitative survey research design was used. To seek the responses from the participants, a standardized tool i.e., “Occupational Stress Index (OSI)” was used. For statistical analysis, proper descriptive statistics i.e., mean, standard deviation and inferential statistics i.e., independent samples t-test were employed through SPSS. The findings revealed that both male and female secondary school heads were found occupationally stressful with respect to role overload, role conflict, strenuous working condition, unreasonable group & political pressure, under participation, and unprofitability. Comparatively, there was no significant difference between the overall occupational stress of male and female secondary school heads. Based on findings, it was recommended that Elementary & Secondary Education Department should have a collaboration with policymakers to develop comprehensive strategies for stress reduction for secondary school heads so that they may perform their duties effectively.</em></p><p><strong>Keywords:</strong> comparative study, gender based study, occupational stress, secondary school heads</p><p><em><br /></em></p>
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Giménez, María José, Marina Giménez-Berenguer, María Emma García-Pastor, Joaquín Parra, Pedro Javier Zapata e Salvador Castillo. "The Influence of Flower Head Order and Gibberellic Acid Treatment on the Hydroxycinnamic Acid and Luteolin Derivatives Content in Globe Artichoke Cultivars". Foods 10, n. 8 (5 agosto 2021): 1813. http://dx.doi.org/10.3390/foods10081813.
Testo completoAbstract (sommario):
Flower head orders and the use of GA3 (gibberellic acid) treatment could be two influencing factors determining the bioactive compound levels in artichoke, but little to no information is available about their effects. In this study, we have therefore evaluated the influence of these factors on the hydroxycinnamic acid and luteolin derivative levels in three categories of artichoke: Seed-propagated open-pollinated cultivars; vegetatively propagated cultivars; and seed-propagated hybrids. The hydroxycinnamic acids and luteolin derivatives were quantified by RP-HPLC-DAD. The average flower head weight was the lowest in tertiary heads and GA3-treated artichokes, followed by secondary and main heads. Moreover, the hydroxycinnamic acid and luteolin derivatives levels were significantly higher in tertiary heads than in secondary or main heads. In addition, the GA3 treatment significantly reduced the hydroxycinnamic acid content and, in contrast, improved luteolin derivatives levels. These effects depended on the flower head order and cultivar. Knowledge of the effects of flower head order and GA3 treatment is therefore key in order to achieve the greatest health-benefits from artichoke consumption.
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Moura, Gisela Maria Schebella Souto de, Ana Maria Müller de Magalhaes, Clarice Maria Dall’agnol, Beatriz Cavalcanti Juchem e Daniela dos Santos Marona. "Leadership in Nursing: Analysis of the Process of Choosing The Heads". Revista Latino-Americana de Enfermagem 18, n. 6 (dicembre 2010): 1099–106. http://dx.doi.org/10.1590/s0104-11692010000600009.
Testo completoAbstract (sommario):
The process of choosing heads can be strategic to achieve desired results in nursing care. This study presents an exploratory and descriptive research that aims to analyze the process of choosing heads for the ward, in the nursing area of a teaching hospital in Porto Alegre. Data was collected from registered nurses, technicians and nursing auxiliaries through a semi-structured interview technique and free choice of words. Three theme categories emerged from content analysis: process of choosing heads, managerial competences of the head-to-be and team articulation. Leadership was the word most frequently associated with the process of choosing heads. The consultation process for the choice of the leader also contributes to the success of the manager, as it makes the team members feel co-responsible for the results achieved and legitimizes the head-to-be in their group.
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Xu, Dan Dan, Run Feng Wu, Li Zhao, Jia Wang Han e Wei Su. "Study on Enzymatic Fermentation of Fish Sauce by Eel Heads". Advanced Materials Research 634-638 (gennaio 2013): 1548–51. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1548.
Testo completoAbstract (sommario):
To reuse the waste of fishery resources in a preliminary study, we have described changes in extractive component during enzymatic fermentation of fish sauce using eel heads. This study was aimed at investigating the chemical and physical analysis of extractive component from fermented eel heads with a view to using it as a food condiment. Fish sauce was produced via enzymatic fermentation of by-products (eel heads) of processed eel with 30% (w/w) of salt for 8 weeks. During 8 weeks of enzymatic fermentation, the pH decreased to approximately 5.35, the salt content remained constant, and the overall trend of total nitrogen, amino acid nitrogen, browning index, total volatile basic nitrogen and optical density were increasing. The changes and the trend line mentioned above indicated that it was a practical method to produce fish sauce using eel heads.
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Chaniago, Pangi Syarwi. "Evaluasi Pilkada Pelaksanaan Pilkada Serentak Tahun 2015". Politik Indonesia: Indonesian Political Science Review 1, n. 2 (15 luglio 2016): 196. http://dx.doi.org/10.15294/jpi.v1i2.6585.
Testo completoAbstract (sommario):
<p>This study was carried out to evaluate the enforcement of the first direct district heads election in 2015, in order to promote the quality of democracy. This study applied qualitative method. There were several findings on this study; (1) direct district heads election has not been efficient yet; (2) direct district heads election has not been able to promote political participation; (3) direct district heads election has not been able to shut off money politic; (4) recruitment the election of district head candidates has not been transparant; (5) financing of direct election was not charged (appropriate) to Regional Government Budget; (6) Constitutional Court refused to adjudicate the dispute of election results if the margin of ballot more than 2%, it broke sense of justice; (7) the phenomenon of the emergence of a single candidate for district heads due to regulations, the must withdraw from candidacy for they were civil servants, military/police, House of Representatives, Regional Representative Board and Regional House of Representatives.</p>
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Ashar, Muhammad Afthon, e Muhammad Nafik Hadi Ryandono. "IMPLEMENTASI METODE CIBEST (CENTER OF ISLAMIC BUSINESS AND ECONOMIC STUDIES) DALAM MENGUKUR PERAN ZAKAT PRODUKTIF TERHADAP PEMBERDAYAAN MUSTAHIQ DI LEMBAGA YAYASAN DANA SOSIAL AL-FALAH (YDSF) SURABAYA1". Jurnal Ekonomi Syariah Teori dan Terapan 6, n. 5 (17 gennaio 2020): 1057. http://dx.doi.org/10.20473/vol6iss20195pp1057-1071.
Testo completoAbstract (sommario):
Productive zakat is the management of zakat funds by providing assistance in the form of business activity funds to mustahiq. The purpose of productive zakat funds to the community is to improve the economic welfare of mustahiq. CIBEST (Center of Islamic Business and Economic Studies) is a method of measuring mustahiq poverty that is based not only on material aspects, but spiritual mustahiq before and after obtaining assistance from zakat funds. This study aims to determine the condition of mustahiq poverty before and after receiving assistance from zakat funds Al-Falah Social Fund Foundation, Surabaya City. The approach used in research is a quantitative approach with case studies. In the technique of collecting data using interview techniques directly to Mustahiq based on questionnaires. The result of this study is that there is a change in the condition of the Mustahiq Quadrant I family (Prosperous) before getting zakat assistance, namely 3 heads of families to 5 heads of families. Quadrant II (Material Poverty) before getting zakat assistance, namely 1 family head, 0 family heads. Quadrant III (Spiritual Poverty Index) before getting help from one family head, 3 family heads. Quadrant IV (Absolute Poverty) before getting zakat assistance, namely 4 heads of families, becomes 0 family heads.Keywords: Productive Zakat, CIBEST, Mustahiq
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Bibi, Tahira, e Afshan Huma. "The Antecedents of Burnout in Heads of Secondary Schools of Khyber Pakhtunkhwa: A Study of Relationships among Burnout, Organizational Commitment and Emotional Intelligence". Global Regional Review IV, n. IV (31 dicembre 2019): 168–77. http://dx.doi.org/10.31703/grr.2019(iv-iv).19.
Testo completoAbstract (sommario):
Occupational burnout, according to Hanisah (2019), is an increasingly important phenomenon in Asian countries. School education departments are no exception. The purpose of this study was to analyze the prevalence of burnout among the heads of secondary schools in KPK. This study also investigates the correlation of burnout, emotional intelligence and organizational commitment. The sample of this study comprised 336 head teachers (168 males and 168 females) of secondary schools in Khyber Pakhtunkhwa. Stratified sampling technique was used to select the sample. The research instruments included Copenhagen burnout inventory, Wong and law emotional intelligence scale, Allen and Meyer organizational commitment. For hypothesis testing, Pearson Correlation Coefficient test was chosen. The study concluded that a significant number of heads were experiencing moderate level of burnout. The findings also revealed that the correlation among burnout, organizational commitment and emotional intelligence was significant among the heads of secondary schools of Khyber Pakhtunkhwa.