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Pawel Rynio, Arkadiusz Kazimierczak, Tomasz Jedrzejczak, Piotr Gutowski
Thoracic endovascular aortic repair (TEVAR) is an established treatment option, though some anatomical challenges require a through-and-through wire technique, and subsequently transapical access via minithoracotomy can be required. It is clear that an objective tool to facilitate decision-making is needed. A 3D print of a severely angulated aortic arch was used as a template to advance a stent-graft and this was achieved after pulling the top of the wire. This simulation assisted in decision-making relating to transapical access with a wire externalization...
August 13, 2018: Annals of Vascular Surgery
Filipp Schmidt, Roland W Fleming
An important task of human visual cognition is to make inferences about properties of objects. One such property is an object's causal history: what happened to the object in its past (e.g., "this paper has been folded"). There is relatively little research on whether and how we make such inferences. We took photographs of objects from six different materials ('wax', 'aluminum foil', 'gold foil', 'chicken wire', 'putty', 'cardboard') transformed by one of four shape-altering transformations ('folded', 'bent', 'crumpled', 'twisted')...
2018: PloS One
Thomas Siefke, Martin Heusinger, Carol B Rojas Hurtado, Johannes Dickmann, Uwe Zeitner, Andreas Tünnermann, Stefanie Kroker
High-performance nano-optical elements for application wavelengths in the ultraviolet spectral range often require feature sizes of only a few tens of nanometers where line edge roughness (LER) becomes a critical parameter for the optical performance. In this contribution, we explore the influence of LER on the optical performance of wire grid polarizers (WGP) in the far ultraviolet range. Therefore, we present a method, which uses the finite difference time domain method in combination with a comprehensive spatial frequency dependent LER model...
July 23, 2018: Optics Express
Dmytro Vovchuk, Sergei Kosulnikov, Constantin Simovski
Wire-medium endoscopes represent a promising tool of THz sensing/imaging. Bending should not critically harm the endoscope operation and the issue of bending losses is that of key importance for any endoscope. In this paper we show that the frequency-averaged power transmittance of a wire-medium endoscope is weakly sensitive to the bending. However, the frequency dispersion of the power loss/transmittance of the endoscope is strongly oscillating. Frequency maxima of the loss factor result from unusual eigenmodes of an elongated wire medium sample...
July 9, 2018: Optics Express
Lei Tong, Mingjing Li, Fan Li, Jian Xu, Tao Hu
The aim of this study was to analyze the management of displaced intra-articular calcaneal fractures in children at our pediatric orthopedic and to determine the results following open reduction via minimally invasive sinus tarsi approach and fixation with Kirschner wires (K-wires). Overall, 25 available cases of calcaneal fractures in children with mean age of 9.8 years were treated by open reduction from January 2010 to December 2015. All patients were followed up from 12 to 30 months (mean: 19 months). Clinical functional outcomes were graded using the American Orthopedic Foot and Ankle Society hindfoot scores...
August 15, 2018: Journal of Pediatric Orthopedics. Part B
Koen Vandaele, Mioko Otsuka, Yasuhiro Hasegawa, Joseph P Heremans
Hicks and Dresselhaus predicted that quantum well and nanowire thermoelectric materials could show a meaningful enhancement of the heat-to-electricity conversion efficiency compared to their bulk counterparts. The unique transport properties of bismuth, specifically the low effective mass, high mobility, and large Bohr radius of its charge carriers, enabled the study of size-quantization effects in Bi nanowires following those theoretical predictions. In this review, the band structure of Bi and Bi1-xSbx alloys is discussed as a function of their composition, temperature, and size-quantization effects...
August 16, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
A Patel, K Shepherd, K Karthik
No abstract text is available yet for this article.
August 16, 2018: Annals of the Royal College of Surgeons of England
Amelia Y Merrill, Daniela Ochoa, V Suzanne Klimberg, Erica L Hill, Michael Preston, Kristen Neisler, Ronda S Henry-Tillman
BACKGROUND: Localization of nonpalpable breast lesions for breast-conserving surgery (BCS) remains highly variable and includes needle/wire localization (NL), radioactive seed localization, radar localization, and hematoma-directed ultrasound-guided (HUG) lumpectomy. The superiority of HUG lumpectomy over NL has been demonstrated repeatedly in terms of safety, accuracy, low positive margin rates, cosmesis, and patient satisfaction. In this study, we evaluate the cost effectiveness of HUG lumpectomy over NL for nonpalpable breast lesions...
August 15, 2018: Annals of Surgical Oncology
G Bulut, I Colak, G Mik, Z Kilic, Z Tasdemir
An 18-year old male patient, with a history of paragliding accident, sustaining a coronal shear fracture of the body of the talus, an anterior process fracture of the calcaneus extending to the calcaneocuboid joint and a nondisplaced navicular body fracture at the right foot and a displaced fracture of the navicular body accompanied with posteromedial process fracture of the talus at the left side was referred to our emergency clinic. For the right foot, the coronal plane fracture of the talar body was anatomically reduced and fixed with screws...
July 2018: Malaysian Orthopaedic Journal
G T Pundkare, S S Deshpande
Introduction: Though complex injuries like CarpoMetacarpal (CMC) Joint dislocations represent only 1% of all hand injuries, they have disabling impact on the functional status of patient. There are no reports in the literature classifying disabling complex injuries like CMC joint dislocations presumably because of low incidence. We propose a new classification through retrospective analysis of patients, along with literature search. Materials and Methods: A new classification system has been proposed and designed at our clinical unit and applied to eight patients with CMC joint dislocations...
July 2018: Malaysian Orthopaedic Journal
Xue-Ya Zhang, Shi-Xin Wu, Xi-Zhe Guo, Ya-Fei Guo, Jing-Xin Pan
OBJECTIVE: To study the clinical characteristics and prognosis of patients with variant Ph chromosome-positive leukemia. METHODS: The defection of morphology, cytogenetics, immunology and molecular biology was performed in 4 cares of variant Ph chromosome-positive leukemia, and the therepeuitics outcome of 4 patients was evaluated. RESULTS: Among 4 cases of variant Ph+ leukemia, 3 cases were patients with CML, including 1 case in chronic phase and 2 cases in accelerated phase; and 1 cases was patient with adult B acute lymphoblasric leukemia(B-ALL)...
August 2018: Zhongguo Shi Yan Xue Ye Xue za Zhi
Takashi Nakamura, Hea Jeong Cheong, Masahiko Takamura, Manabu Yoshida, Sei Uemura
Copper nitride particles have a low decomposition temperature, they absorb light, and are oxidation-resistant, making them potentially useful for the development of novel wiring inks for printing circuit boards by means of intense pulsed light (IPL) sintering at low-energy. Here, we compared the thermal decomposition and light absorption of copper materials, including copper nitride (Cu₃N), copper(I) oxide (Cu₂O), or copper(II) oxide (CuO). Among the copper compounds examined, copper nitride had the second highest light absorbency and lowest decomposition temperature; therefore, we concluded that copper nitride was the most suitable material for producing a wiring ink that is sintered by means of IPL irradiation...
August 14, 2018: Nanomaterials
Marc Rabionet, Emma Polonio, Antonio J Guerra, Jessica Martin, Teresa Puig, Joaquim Ciurana
Open-source 3D printers mean objects can be quickly and efficiently produced. However, design and fabrication parameters need to be optimized to set up the correct printing procedure; a procedure in which the characteristics of the printing materials selected for use can also influence the process. This work focuses on optimizing the printing process of the open-source 3D extruder machine RepRap, which is used to manufacture poly(ε-caprolactone) (PCL) scaffolds for cell culture applications. PCL is a biocompatible polymer that is free of toxic dye and has been used to fabricate scaffolds, i...
August 14, 2018: Materials
Elizabeth P Lackey, Detlef H Heck, Roy V Sillitoe
The cerebellum is the focus of an emergent series of debates because its circuitry is now thought to encode an unexpected level of functional diversity. The flexibility that is built into the cerebellar circuit allows it to participate not only in motor behaviors involving coordination, learning, and balance but also in non-motor behaviors such as cognition, emotion, and spatial navigation. In accordance with the cerebellum's diverse functional roles, when these circuits are altered because of disease or injury, the behavioral outcomes range from neurological conditions such as ataxia, dystonia, and tremor to neuropsychiatric conditions, including autism spectrum disorders, schizophrenia, and attention-deficit/hyperactivity disorder...
2018: F1000Research
Florian D Grill, Lucas M Ritschl, Hannes Dikel, Andrea Rau, Maximilian Roth, Markus Eblenkamp, Klaus-Dietrich Wolff, Denys J Loeffelbein, Franz X Bauer
Nasoalveolar molding (NAM) aims to improve nasal symmetry with a nasal stent in cleft lip and palate (CLP) patients. When plates have to be exchanged because of dentoalveolar growth or cleft reduction, the nasal stent has to be mounted onto a new plate. This procedure elongates visiting hours for patients and parents or requires second treatment sessions. This study introduces a quick-lock additive manufacturing solution for chairside nasal stent exchange called RapidNAM. A novel taping retention pin has been designed that enables nasal stent insertion...
August 14, 2018: Scientific Reports
Sebastian Z Oener, Alessandro Cavalli, Hongyu Sun, Jos E M Haverkort, Erik P A M Bakkers, Erik C Garnett
Charge carrier-selective contacts transform a light-absorbing semiconductor into a photovoltaic device. Current record efficiency solar cells nearly all use advanced heterojunction contacts that simultaneously provide carrier selectivity and contact passivation. One remaining challenge with heterojunction contacts is the tradeoff between better carrier selectivity/contact passivation (thicker layers) and better carrier extraction (thinner layers). Here we demonstrate that the nanowire geometry can remove this tradeoff by utilizing a permanent local gate (molybdenum oxide surface layer) to control the carrier selectivity of an adjacent ohmic metal contact...
August 14, 2018: Nature Communications
Anna M Varizhuk, Anna D Protopopova, Vladimir B Tsvetkov, Nikolay A Barinov, Victor V Podgorsky, Maria V Tankevich, Maria A Vlasenok, Vyacheslav V Severov, Igor P Smirnov, Evgeniy V Dubrovin, Dmitry V Klinov, Galina E Pozmogova
We examined the assembly of DNA G-quadruplexes (G4s) into higher-order structures using atomic force microscopy, optical and electrophoretic methods, NMR spectroscopy and molecular modeling. Our results suggest that parallel blunt-ended G4s with single-nucleotide or modified loops may form different types of multimers, ranging from stacks of intramolecular structures and/or interlocked dimers and trimers to wires. Decreasing the annealing rate and increasing salt or oligonucleotide concentrations shifted the equilibrium from intramolecular G4s to higher-order structures...
August 11, 2018: Nucleic Acids Research
Mohamed F A Farghly, Khalid M Mahrose, Ross G Cooper, Z Ullah, Z Rehman, C Ding
Floor type management is an important factor in turkey production in hot climates exceeding 30°C. In this study, a total of 360 turkeys aged 4 wk were randomly distributed to investigate growth performance, carcass characteristics, certain health aspects (breast blisters score, footpad burns, hock discoloration, and plumage condition), and airborne conditions. Birds in the first group were raised on a littered floor (control; C), whereas birds in the other groups (T1, T2, T3, T4, and T5) were raised on cement, wire net, rubber mat, plastic and wooden slatted floors, respectively...
August 13, 2018: Poultry Science
Uygur Esat, Oguz Poyanli, Mutlu Brahim, Çelk Talip, Akpinar Fuat
BACKGROUND: This study compared the biomechanical properties of three different fixation methods of tension band wirings, used in the treatment of medial malleolus fractures. The first method used an innovative "handmade bent pin" for cerclage fixation. The second method used a U-shaped K-wire to attach the cerclage to the medial tibial cortex. These two novel fixation techniques were compared with the traditional tension band wiring technique which is fixated to the bone by a screw...
August 11, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
Nicholas Pulos, Kathleen M Kollitz, Allen T Bishop, Alexander Y Shin
BACKGROUND: Outcomes following revision surgery for scaphoid nonunions with osteonecrosis are guarded. We hypothesized that use of free vascularized medial femoral condyle (MFC) bone grafts can lead to healing of the nonunion, increase vascularity of the proximal pole, and restore scaphoid architecture, resulting in acceptable functional outcomes. METHODS: We performed a retrospective review of 49 patients who were treated with an MFC bone graft, between May 2005 and September 2016, after prior failure of operative treatment for scaphoid nonunion...
August 15, 2018: Journal of Bone and Joint Surgery. American Volume
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