bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pseudarthrosen am Sakrum
Authors: Culemann Ulf 
Published: November 2019

ZusammenfassungPseudarthrosebehandlung ist Komplikationsmanagement, am Sakrum wie auch in anderen Regionen des Körpers. Fehlschläge nach Osteosynthesen des Beckenrings und speziell des Sakrums mit nachfolgender Pseudarthrose sind i. d. R. chirurgisch schwer zu behandeln und sollten vor erneuten Revisionseingriffen ausreichend vorbereitet werden. Das Ziel der primären Behandlung von Beckenringverletzungen sollte es daher immer sein, eine derartige Komplikation möglichst zu vermeiden. Durch die richtige Klassifikation der Beckenringfraktur, die korrekte primäre Einschätzung der spezifischen Besonderheiten der Verletzung, die konservative oder operative Therapieentscheidung, die operativ notwendige Zugangswahl und letztendlich die Auswahl und Ausführung der Osteosynthese haben einzeln und in ihrer Gesamtheit eine entscheidende Bedeutung für den langfristigen Erfolg. Es sollte daher eingehend geprüft werden, ob die persönliche Erfahrung und die strukturellen Voraussetzungen der eigenen Klinik gegeben sind, eine primäre operative Therapie am hinteren Beckenring durchzuführen. Spätestens beim Komplikationsmanagement wie einer Sakrumpseudarthrose sollte diese Frage sicher mit „ja“ beantwortet werden können. Die inhaltliche Auseinandersetzung des behandelnden Chirurgen mit dem Patienten und seinem „spezifischen“ Problem am Sakrum ist dabei unabdingbare Voraussetzung. Letztlich führt nur die vollumfängliche Aufklärung, adäquate Operationsmethode und die Nachbetreuung durch den Chirurgen zur Ausheilung der Pseudarthrose am Ende der Behandlung. Die Mitwirkung des „aufgeklärten“ Patienten ist dabei ebenso unabdingbare Voraussetzung. Die operative Therapie der Sakrumpseudarthrose muss sowohl eine sichere mechanische Belastbarkeit des Beckens erzielen als auch durch schonende Präparation und ausreichende Stimulation der biologischen Knochenheilung zur definitiven Durchbauung der Pseudarthrose beitragen.
Postoperative Qualitätssicherung nach Kataraktoperation über das Internet
Authors: Lang Stefan J. , Böhringer Daniel , Ness Thomas , Reinhard Thomas 
Published: November 2019

Zusammenfassung
Hintergrund Eine Vielzahl an Operationen im Bereich der Augenheilkunde findet ambulant oder nur im Rahmen eines kurzen stationären Aufenthalts statt. Hierbei sind die Qualitätsanforderungen sehr hoch. Postoperative Qualitätskontrollen durch die Operateure scheitern häufig daran, dass die postoperative Nachsorge meist nicht am Operationszentrum, sondern bei den zuweisenden niedergelassenen Augenärzten erfolgt.
Methoden Zur Optimierung der operativen Qualitätssicherung hat die Klinik für Augenheilkunde des Universitätsklinikums Freiburg im Verbund mit dem Augennetz Südbaden (ANSB), in dem eine große Zahl niedergelassener Augenärzte aus der Region untereinander vernetzt sind, ein internetbasiertes Qualitätssicherungsverfahren entwickelt. Es erfolgt eine umfassende Berichterstattung zu den Kataraktoperationen. Die Ergebnisse der Nachuntersuchung werden unter Beachtung datenschutzrechtlicher Vorgaben über gesicherte Internetmasken aus den Arztpraxen strukturiert zurückgemeldet. Die Rückmeldungen erfolgen immer erst nach 2 – 3 Monaten und somit zu einem Zeitpunkt, an dem in aller Regel das endgültige Operationsergebnis beurteilt werden kann.
Ergebnisse Seit Einrichtung des Qualitätsregisters im November 2009 wurden bis Ende 2018 insgesamt 8043 Datensätze nach Kataraktoperation gemeldet. Diese Stichprobe umfasst 20,2% aller im gleichen Zeitraum an der Klinik für Augenheilkunde des Universitätsklinikums Freiburg durchgeführten Kataraktoperationen. Das mittlere Follow-up lag bei 76 Tagen. Die Zielrefraktion wurde bei 90% aller operierten Augen um weniger als 1 dpt verfehlt. Als Risikofaktor für ein Verfehlen der Zielrefraktion konnte der Z. n. Keratoplastik identifiziert werden.
Schlussfolgerung Die internetbasierte Qualitätssicherung der Klinik für Augenheilkunde des Universitätsklinikums Freiburg ermöglicht erstmals die kontinuierliche Überwachung der Operationsqualität über einen längeren Zeitraum. Diese stellt sich als hoch heraus. Bei Vorliegen eines Z. n. Keratoplastik als Risikofaktor für ein Verfehlen der Zielrefraktion sollte die Biometrie präoperativ kritisch hinterfragt werden.
Intramedullary Nailing and Minimally Invasive Percutaneous Plate Osteosynthesis in Treatment of Displaced Clavicular Mid-shaft Fractures: A Prospective Study
Authors: Yuan Hang , Wang Ran , Zheng Jie , Yang Yonghong 
Published: November 2019

Abstract
Objective To compare the difference between MIPO and IMN methods in the treatment of displaced clavicular mid-shaft fractures.
Methods A total 163 patients were consecutively enrolled and randomly divided into the MIPO group or the IMN group. Clinical characteristics and outcomes including age, gender, causes of fractures, and AO/OTA type as well as hospitalization time, healing time, and postoperative complications were analyzed. Constant-Murley scores and DASH scores were used for assessment of shoulder joint and upper extremity function, respectively.
Results In this study, 82 cases received MIPO and 81 cases received IMN. The mean operation time, mean bleeding volume, mean hospitalization time, and mean healing time showed no significant difference between the MIPO and IMN groups. At 3 months after surgery, Constant-Murley scores were significantly higher and DASH scores were significantly lower in the MIPO group than the IMN group. No significant difference was observed for both indexes at 6 months. The fracture nonunion rate was significantly lower in the MIPO group. No significant difference was found in other complications.
Conclusion Both methods were effective for the treatment of displaced clavicular mid-shaft fractures. However, the MIPO method might be better for recovery of shoulder and upper extremity function in the short term and might have a lower nonunion rate.
Association between Muscle Damage and Head Impacts in High School
American Football
Authors: Huibregtse Megan E. , Zonner Steven W. , Ejima Keisuke , Bevilacqua Zachary W. , Newman Sharlene D. , Macy Jonathan T. , Kawata Keisuke 
Published: November 2019

AbstractSubconcussive head impacts (SHI), defined as impacts to the cranium that do not
result in concussion symptoms, are gaining traction as a major public health
concern. The contribution of physiological factors such as physical exertion and
muscle damage to SHI-dependent changes in neurological measures remains unknown.
A prospective longitudinal study examined the association between physiological
factors and SHI kinematics in 15 high school American football players over one
season. Players wore a sensor-installed mouthguard for all practices and games,
recording frequency and magnitude of all head impacts. Serum samples were
collected at 12 time points (pre-season, pre- and post-game for five in-season
games, and post-season) and were assessed for an isoenzyme of creatine kinase
(CK-MM) primarily found in skeletal muscle. Physical exertion was estimated in
the form of excess post-exercise oxygen consumption (EPOC) from heart rate data
captured during the five games. Mixed-effect regression models indicated that
head impact kinematics were significantly and positively associated with change
in CK-MM but not EPOC. There was a significant and positive association between
CK-MM and EPOC. These data suggest that when examining SHI, effects of skeletal
muscle damage should be considered when using outcome measures that may have an
interaction with muscle damage.
Presbyopiekorrektur mittels Linsensystemen
Authors: Knorz Michael C. 
Published: November 2019

ZusammenfassungDie Akkommodationsfähigkeit der Linse nimmt mit dem Alter ab; eine vollständige chirurgische Wiederherstellung ist derzeit jedoch noch nicht möglich. Durch moderne Intraokularlinsen kann allerdings der weitgehende Verzicht auf eine Brillenkorrektur erreicht werden.
Cortisol Levels in Glucagon Stimulation Test in Children Assessed for Short Stature: Clinical and Laboratorial Correlations
Authors: Maliachova Olga , Dimitriadou Meropi , Triantafyllou Panagiota , Slavakis Aris , Christoforidis Athanasios 
Published: November 2019

AbstractTo assess total cortisol levels in children being evaluating for short stature with normal cortisol reserve and to correlate this response to clinical and laboratory data. Children assessed with glucagon test in our department were recruited in this study retrospectively. Inclusion criteria were: i) age>1 year, ii) absence of chronic illness or medication interfering with ACTH-cortisol axis, iii) GH stimulation levels>3ng/mL at least in one provocation test (glucagon or clonidine), iv) absence of multiple pituitary growth hormone deficiencies, v) normal short Synacthen test in cases of low cortisol response in glucagon test.Two hundred and thirty-seven subjects (160 males, 67.5%) with a mean age of 9.02±3.19 years, were finally included in the analysis. Cortisol peak levels but not cortisol AUC were significantly increased in females compared to males (26.83±7.31 μg/dl vs. 24.04±7.20 μg/dl). When linear correlations were studied, both cortisol peak levels and cortisol AUC were linearly but inversely correlated to age (r=−0.234, p<0.001 and r=−0.315, p<0.001, respectively). Finally, cortisol AUC was inversely correlated to weight Z-scores (r=−0.160, p=0.014). When our analysis was limited only to subjects with intact GH response (GH peak> 7 ng/mL), age was still inversely correlated to cortisol AUC (r=−0.312, p<0.001), and cortisol AUC was linearly correlated to GH AUC assessed with clonidine test (r=0.223, p=0.013). Girls, younger and thinner children exhibit higher cortisol response to glucagon test.
Weight-bearing Imaging in Adolescent Idiopathic Scoliosis
Authors: Chiyanika Chileka , Chu Winnie Chiu Wing 
Published: November 2019

AbstractThis article reviews the weight-bearing imaging methods in the diagnosis and monitoring of patients with adolescent idiopathic scoliosis (AIS), a three-dimensional (3D) deformity of the spine with unknown etiology. The apical vertebrae in AIS rotate away from the midline in a complex 3D pattern that formerly could only be appreciated by computed tomography (CT). Despite its superb anatomical delineation, CT is not ideal due to high radiation and scanning in either the supine or prone position; hence the full effect of gravity on the spinal curvature cannot be assessed. The introduction of low-dose stereoradiography with the capacity of 3D reconstruction has recently opened up a new era of assessment of the scoliotic spine in the upright position at multiple time points during the preoperative and postoperative period. The handheld 3D ultrasound imaging system also provides a radiation-free alternative for close monitoring for disease progression and treatment outcomes for AIS. Upright magnetic resonance imaging is radiation free and superb for the assessment of spinal cord and intervertebral disks; however, its utilization in scoliosis is limited by high cost and limited availability.
Thromboprophylaxis in Neuro Intensive Care Unit
Authors: Swain Amlan , Sahu Seelora , Panigrahi Binita , Nag Deb S. 
Published: November 2019

AbstractThe propensity for venous thromboembolism in patients admitted to neurocritical care setups is high because of predilection toward venous stasis as well as pathological processes favoring embolus formation and dissemination. The application of routine thromboprophylaxis guidelines in the various subsets of neurologically injured patients is limited by the fear of bleeding inside neurologically significant closed locations. The aim of this review is to lay out thromboprophylaxis guidelines in various subsets of patients admitted to neurocritical care setups according to recent evidence base, which is still an evolving process.
Injerto de Piel de Espesor Total en Recurrencia de Dupuytren: Resultados Tempranos
Authors: Montes-Pérez Raquel A. , Del Cerro-Gutiérrez Miguel , García-Lira Francisco 
Published: November 2019

Resumen
Introducción No existe un algoritmo de manejo estándar de la recurrencia de la Enfermedad de Dupuytren; el injerto de piel de espesor total posterior a dermofasciectomía ofrece una opción viable para el manejo. El objetivo del estudio fue describir el tamaño del injerto, movilidad articular, satisfacción con la apariencia y funcionalidad, así como complicaciones en pacientes con recurrencia de Enfermedad de Dupuytren, tratados con injerto de piel de espesor total posterior a dermofasciectomía.
Material y Métodos Se realizó un estudio de cohorte en pacientes con recurrencia de Enfermedad de Dupuytren tratados con injerto de espesor total de piel posterior a la dermofasciectomía. Se incluyeron 22 dedos de 19 pacientes con edad promedio de 64,7 años. Las principales variables registradas fueron: grados de flexión pre y postquirúrgica en la articulación MF e IFP, tamaño del injerto, tiempo de seguimiento postquirúrgico, satisfacción de los resultados con la apariencia del injerto y funcionalidad en la vida diaria, así como las complicaciones.
Resultados El tamaño promedio del injerto fue de 3,3 × 1,7cm y la duración del seguimiento de 24,7 meses en promedio. En el postquirúrgico, se alcanzó extensión completa de la MF; encontraste con 55,7° de flexión en el pre quirúrgico. La articulación IFP presentó, en promedio, flexión de 64,2° (pre-quirúrgico) y en el postquirúrgico, se logró flexión y extensión completa en 8 dedos; déficit de extensión de 25° en 6 y contractura de 78,7°, en promedio, en 8 dedos. Diez de 19 pacientes, dijeron estar muy satisfechos con la apariencia del injerto y funcionalidad. Las complicaciones más frecuentes fueron alteraciones sensitivas.
Conclusión Se demostraron buenos resultados en los grados de movilidad y satisfacción respecto a la apariencia y funcionalidad; no existen reportes previos con la descripción del tamaño del injerto utilizado. En nuestra experiencia, la colocación de injerto es una opción terapéutica adecuada.
Postnatal Amelioration of Fetal Right Ventricular Hypoplasia Associated with Large Eustachian Valve: A Case Report
Authors: Iwatani Ayaka , Miyake Fumihito , Ishido Hirotaka , Kanai Masayo , Ishiguro Akio , Iwamoto Yoichi , Kabe Kazuhiko , Masutani Satoshi 
Published: November 2019

AbstractIn fetuses, the Eustachian valve directs oxygenated blood returning from the inferior vena cava into the left atrium via the foramen ovale. If too large, the Eustachian valve can restrict right ventricular inflow, as well as induce postnatal cyanosis via an interatrial right-to-left shunt. We report a fetal case of postnatal amelioration of the tricuspid valve and right ventricle hypoplasia, despite significant right ventricular hypoplasia associated with a large Eustachian valve. Application of an appropriate respiratory management regimen to help reduce pulmonary vascular resistance is of particular importance for the reversal of the right-to-left shunt via the foramen ovale and associated increases in right ventricular inflow.
A novel approach in comparison and experimentation of Hybrid Metal Matrix Composites using advanced MCDM methods
Authors: Bose Soutrik , Samanta Samiran , Mandal Nabankur , Soumyajit De , Sekhar Mistry Niladri , Koley Partha , Nandi Titas 
Published: November 2019

Abstract
Factual material selection is essential in the manufacturing arena with a superior product and minimum cost. This paper highlights on the advanced multi-criteria approaches namely additive ratio assessment (ARAS) and multi-attributive border approximation area comparison (MABAC) methods for the best material selection of a hybrid composite using aluminum (Al) as base material varying different reinforcement weights and recycling with various industrial wastes by stir casting. Al/WCE gives superior tribomechanical properties at lower cost than the other reinforcements. ARAS and MABAC methods are applied, based on the properties and attributes of the hybrid composites, to compare between the computational and experimental results. The results exactly corroborate with the previous research results which authenticate the expediency of these methods during the solving of complex hybrid material selection problems. Out of 48 different samples, the best hybrid composite material obtained by ranking is material number A30 by ARAS approach (rank 1) which is Al+Al2O3 at 12.5% wt. addition and material number A24 (rank 2) which is heat treated 12.5%wt. WCE. But the same A30 is obtained to be rank 5 and A24 is obtained to be rank 1 by MABAC method. A24 is obtained to be the best hybrid composite after the experimentation.
Modeling & Analysis of B4C Powder Mixed Wire EDM Process for Improving Performance Criteria of Ti6Al4V
Authors: Chakraborty Sadananda , Mitra Souren , Bose Dipankar 
Published: November 2019

Abstract
The present investigation represents the effect of B4C powder properties on performance characteristics of Ti6Al4V material. Boron carbide has good chemical resistance, low density and non-oxide properties. Due to that, it has a great impact on powder mixed wire EDM. The machining of Ti6Al4V is very difficult by other non-conventional processes when it is considered particularly through cutting operation with desired surface quality and strong economically. In this study pulse on time, pulse off time, peak current and gap voltage are considered as input parameter and analyzed the performance characteristics such MRR and SR. B4C Powder concentration and size in the dielectric are analyzed to get significant output. The optimum result is obtained from machining condition i.e. powder size 10μm and concentration 6gm/lit as for both performances like MRR and SR while machining controllable parameters are fixed i.e. Ip=2, Ton=30 and Toff=8. The machined surface is studied through microstructure image
Thermo-physical properties of solar thermic fluids dispersed with carbon nanotubes
Authors: Srinivas Dr. V. , Raviteja S. , Jaikumar S. , Swathi V. , Sravya DNV 
Published: November 2019

Abstract
The paper examines the influence of dispersion of multi-walled carbon nanotubes on the thermo-physical properties of working fluids used in solar thermal engineering systems. Thermo-physical property evaluation is very vital to evaluate the performance of solar thermal systems. Ethylene glycol and a commercially reachable thermic fluid therminol 62 are preferred as based fluids. Nanofluids are prepared by dispersing 0.1 %, 0.25 %, 0.5 % and 0.1 % weight fraction of surface modified Multi-walled carbon nanotubes. The nanomaterials are surface modified before dispersion in the thermic fluids and extreme care is taken to prevent property deterioration during surface modification. Thermal conductivity of test fluids is evaluated in the temperature range of 100 to 300°C while viscosity is evaluated in the range of 50 to 150°C s. A 15 to 20 % increase in the thermal conductivity is observed with the dispersion of carbon nanotubes. The viscosity is significantly increased in the low-temperature ranges while the change is minimal above 70. The data could be predicted successfully using artificial neural networks.
Investigation of the Machining Performance of Neem Oil as a Dielectric Medium of EDM: A Sustainable Approach
Authors: Das Shirsendu , Paul Swarup , Doloi Biswanath 
Published: November 2019

Abstract
The Electric Discharge Machining is one of the popular non-traditional approaches which has huge utility in industrial sectors, mostly in die-making industries and as well as in bio-medical fields. But more power consumption, evolvement of unhygienic gases, development of non- biodegradable wastes, etc. are some curtail issues, which leads the poor sustainability of the EDM operation. In this approach, transesterified neem is introduced as a new and green dielectric medium of EDM, and its impacts on EDM responses are examined. Here, machining is carried out between 4 A to 10 A ranges of input current, 100 μ-sec to 200 μ-sec of pulse ON time and 10 μsec to 30 μ-sec of pulse OFF time using both kerosene and transesterified neem as a dielectric medium. The responses like MRR, surface roughness, and microscopic views of machined surfaces are analyzed to check the viability of transesterified neem as a dielectric medium of EDM.It is experimentally observed that transesterified neem as a dielectric medium ensured 6.2 % to 15.6 % more removal rate and 12.25 % to 15.45 % less surface roughness than kerosene.
Effect of Mn doping on the Optical and Electrical Properties of TiO2 thin film prepared by Unconventional Sol-gel route
Authors: Devi Maya , Panigrahi M.R. 
Published: November 2019

Abstract
Semi-transparent nanostructured Mn doped titanium dioxide thin films have been prepared by modified sol-gel route starting from the powder reagents. The films deposited on plane glass slides is annealed at 3500C. The characterizations of the films are done with X-ray diffraction, Scanning electron microscopy, UV-Vis spectroscopy and Hall measurement. Although annealing transformed the structure from tetragonal body centered to tetragonal primitive, the preferential growth have been reported along the (300) orientation of the diffracting planes. The optical transmittance of the film increases with annealing temperature. The optical parameters like refractive index and extinction coefficients are calculated from the transmission and reflection spectra, and the dispersion in the refractive index has been discussed in terms of single oscillator Wemple and Di Domenico model.
Numerical Analysis of Composite Coating(Al2O3+ZrO2·5CaO) applied on Cast Iron
Authors: Abhinav  , Sasmita Bal , Kapilesh K 
Published: November 2019

Abstract
A new method, the rule of the mixture is developed for the determination of thermal conductivity (K), allied properties viz.density and the volume of the individual composite coating powders. Optimum coating thickness through steady-state thermal analysis of composite coating (Al2O3+ZrO2·5CaO) applied on cast iron surface is carried out. Also, the thermodynamic behaviour of TGO and bond coat were simulated. The thickness of the topcoat, TGO, and the bond coat was varied independently in the range of 0.1 to 0.04 mm. Results show that topcoat thickness doesn’t have much influence on the heat transfer. However, TGO and the bond coat plays a crucial role in heat transfer study. Maximum heat resistance, 171.47 ºC observed at 1 mm TGO thickness, compared to 88.94 ºC in case of bond coat for the same coating thickness. It is also understood that 1 mm of optimal TGO thickness may be beneficial in the design of thermal barrier composite coating systems.
Recent Trends and Future Perspectives on Vibration Assisted Turning: A Brief Review
Authors: Mohapatra Shuvam , Panda Amlana , Kumar Ramanuj , Kumar Sahoo Ashok 
Published: November 2019

Abstract
Over the years, machining Industry has been facing significant challenges concerning enhanced machining characteristics. The main focal objective in machining technology is to augment the measured performance characteristics and also to diminish manufacturing costs, which is important for successful production planning. Vibration-assisted machining is generally used to improve the process by applying a less amplitude and more frequency vibration to the cutting tool or work piece motion. This process requires many advantages, such as superior mechanical properties, lower machining forces and stress levels over the traditional methods that lead to the notable and universal use of ultrasonic vibrations in machining. This brief overview has indicated out research gap and technological confronts for the betterment of vibration assisted techniques. This present article is proposed to demarcate the vibration assisted turning principle, factors and its benefits that can be further used to assess for the machining distinctiveness. Furthermore, based on the brief overview, future research possibilities have been identified to reinforce the capabilities of the vibration assisted turning process to make it efficient for industrial and academic metal cutting research community.