The Anatomic, Constraint and Material Properties of the Scapholunate Interosseous Ligament: A Preliminary Study

1994 ◽  
pp. 9-16 ◽  
Author(s):  
Richard A. Berger ◽  
Toshihiko Imaeda ◽  
Lawrence Berglund ◽  
Kai-Nan An ◽  
William P. Cooney ◽  
...  
Keyword(s):  
Material Properties ◽  
Interosseous Ligament ◽  
Preliminary Study

scholarly journals The treatment of scaphoid non-unions with partial and total scaphoid in titanium custom-made 3D-printed prostheses and reconstruction of scapholunate interosseous ligament: a preliminary study

2021 ◽  
Author(s):  
Alessio Cioffi ◽  
Mario Igor Rossello
Keyword(s):  
Hand Surgery ◽  
Interosseous Ligament ◽  
Scaphoid Fractures ◽  
Custom Made ◽  
3D Printed ◽  
Preliminary Study ◽  
Surgery Department ◽  
Over Time

ABSTRACTThe treatment of sequelae of scaphoid fractures is still one of the unsolved problems of hand surgery. Between January 2019 and July 2020 in the Hand Surgery Department of San Paolo’s Hospital in Savona (Italy) 9 partial scaphoid in titanium custom-made 3D-printed prosthesis have performed in 9 patients (all men) with an average age of 27.5 years (minimum 18-maximum 37 years). The aim of the study is to evaluate over time the clinical-functional and radiographic results of the wrists treated with partial and total scaphoid titanium custom-made 3D-printed prostheses and reconstruction of SLIL.

scholarly journals PENGARUH MATERIAL RUANG PADA KENYAMANAN TERMAL RUANG MEMBATIK YANG MENGGUNAKAN SKYLIGHT STUDI KASUS: RUMAH BATIK KATURA, PLERED, CIREBON (The Effect of Space Material to Thermal Comfort of Batik Craftsperson Room with Skylight, Case Study: Batik Katura H

2015 ◽  
Vol 13 (2) ◽  
pp. 81
Author(s):  
Dyah Nurwidyaningrum ◽  
Hidjan A.G ◽  
Rita Farida
Keyword(s):  
Thermal Comfort ◽  
Program Analysis ◽  
Material Properties ◽  
Research Method ◽  
Thermal Problem ◽  
Air Movement ◽  
U Value ◽  
Preliminary Study ◽  
Space Material

Problem in using skylight for batik craftsperson is discomfort thermal that could bother batik craftsperson work. The skylight which used in the preliminary study was declared really effective for day lighting batik craftsperson work plane. This must be proved to comfort thermal problem. Questions in this research is how to solve discomfort thermal in the batik craftsperson space caused use skylight to natural light. The research method uses phenomenology and simulation ecotect program. Analysis about the condition of exixting show discomfort thermal because temperature is 32,79-35,01oC, still overheat than 27,1oC according to SNI 03-6572-2001. The analysis on alternatif 1 showed that the decrease in temperature 2,08oC be 30,01oC in June, but still too hot however these materials has have low U-value. Further analysis with the changes material properties, show reduced from the fist alternative 4,27oC become 28,52oC. Although this value has not yet reach 27,1oC l in SNI but thermal comfort could be achieved by air movement (mechanical fan) that can make people feel 2 oC temperature decrease from the real.

Constraint and material properties of the subregions of the scapholunate interosseous ligament

1999 ◽  
Vol 24 (5) ◽  
pp. 953-962 ◽  
Author(s):  
Richard A. Berger ◽  
Toshihiko Imeada ◽  
Lawrence Berglund ◽  
Kai-Nan An
Keyword(s):  
Material Properties ◽  
Interosseous Ligament

Künzel Model and Boundary Inverse Problem

2017 ◽  
Vol 1144 ◽  
pp. 115-120
Author(s):  
Jan Havelka ◽  
Jan Sýkora
Keyword(s):  
Material Properties ◽  
Computational Models ◽  
Moisture Transfer ◽  
Sufficient Accuracy ◽  
Building Structures ◽  
Impedance Tomography ◽  
Stochastic Description ◽  
Boundary Measurements ◽  
Preliminary Study ◽  
Heat And Moisture

In order to obtain material properties of a given system it is convenient in many casesto perform only noninvasive, i.e. boundary measurements. Our interest is then focused on buildingmaterials and their functionality when exposed to heat and moisture. To describe the underlying phenomena of heat and moisture transfer we use Künzel model with stochastic description of materialproperties for its relative simplicity and sufficient accuracy. For the inverse procedure weintend to utilize the Calderón’s problem framework which is regularly used in medical imaging asElectrical Impedance Tomography and is based on knowing Dirichlet-to-Neumann or Neumannto-Dirichlet map.Overall this work serves as a preliminary study of both aforementioned computational models andits goal is therefore to build up a solid foundations for further redefinition of both models in order tofit the realistic loading conditions for building structures.

Ab-initio Studies of Plutonium with Relevance to Nuclear Waste Management

2002 ◽  
Vol 757 ◽  
Author(s):  
Arun K. Setty ◽  
B. R. Cooper ◽  
D. L. Price
Keyword(s):  
Nuclear Waste ◽  
Material Properties ◽  
Unsolved Problem ◽  
Soret Effect ◽  
Nuclear Waste Management ◽  
Depth Of Penetration ◽  
Nuclear Waste Storage ◽  
Delta Phase ◽  
Waste Storage ◽  
Preliminary Study

ABSTRACTPlutonium, well known for its unusual nuclear and material properties, has remained an unsolved problem for over a half century. Due to the continuing issue of safe, longterm nuclear waste storage, gaining an understanding of plutonium and its compounds cannot be overstated. Self-irradiation in plutonium leads to vacancy formation [1], and our computations indicate that the electronic structure we predict for pure delta plutonium is preserved in the presence of vacancies, and that vacancies do stabilize the delta phase. A preliminary study of self-diffusive properties of plutonium, and of diffusion at the interface of plutonium and iron indicates that plutonium atoms readily diffuse across the interface with steel. This has relevance in nuclear waste storage in steel containers for assessing the depth of penetration to be dealt with in surface treatment for decontamination. The effect of thermomigration (Soret effect) in the plutonium-steel system appears to facilitate the movement of plutonium atoms into the bulk steel.

The Ultrastructure of Metastatic Human Mammary Carcinoma After Prolonged Estrogen Therapy

1967 ◽  
Vol 25 ◽  
pp. 180-181
Author(s):  
John H.L. Watson ◽  
John L. Swedo ◽  
R.W. Talley
Keyword(s):  
Mammary Carcinoma ◽  
Osmium Tetroxide ◽  
Estrogen Therapy ◽  
Ultrastructural Level ◽  
Uranyl Acetate ◽  
Human Mammary Carcinoma ◽  
Surgical Biopsy ◽  
Lead Hydroxide ◽  
Preliminary Study ◽  
Hormonal Therapies

A preliminary study of human mammary carcinoma on the ultrastructural level is reported for a metastatic, subcutaneous nodule, obtained as a surgical biopsy. The patient's tumor had responded favorably to a series of hormonal therapies, including androgens, estrogens, progestins, and corticoids for recurring nodules over eight years. The pertinent nodule was removed from the region of the gluteal maximus, two weeks following stilbestrol therapy. It was about 1.5 cms in diameter, and was located within the dermis. Pieces from it were fixed immediately in cold fixatives: phosphate buffered osmium tetroxide, glutaraldehyde, and paraformaldehyde. Embedment in each case was in Vestopal W. Contrasting was done with combinations of uranyl acetate and lead hydroxide.

Fine structure of early degenerating myofibers in the tibialis anterior of young ‘MDX’ mouse

1988 ◽  
Vol 46 ◽  
pp. 322-323
Author(s):  
H.D. Geissinger ◽  
C.K. McDonald-Taylor
Keyword(s):  
Fine Structure ◽  
Muscle Regeneration ◽  
Tibialis Anterior ◽  
Genetic Defect ◽  
Mdx Mouse ◽  
Mdx Mice ◽  
Histopathological Changes ◽  
Electron Microscopic ◽  
Dystrophic Mouse ◽  
Preliminary Study

A new strain of mice, which had arisen by mutation from a dystrophic mouse colony was designated ‘mdx’, because the genetic defect, which manifests itself in brief periods of muscle destruction followed by episodes of muscle regeneration appears to be X-linked. Further studies of histopathological changes in muscle from ‘mdx’ mice at the light microscopic or electron microscopic levels have been published, but only one preliminary study has been on the tibialis anterior (TA) of ‘mdx’ mice less than four weeks old. Lesions in the ‘mdx’ mice vary between different muscles, and centronucleation of fibers in all muscles studied so far appears to be especially prominent in older mice. Lesions in young ‘mdx’ mice have not been studied extensively, and the results appear to be at variance with one another. The degenerative and regenerative aspects of the lesions in the TA of 23 to 26-day-old ‘mdx’ mice appear to vary quantitatively.

Grain boundary segregation in metals

1992 ◽  
Vol 50 (2) ◽  
pp. 1204-1205
Author(s):  
C.L. Briant
Keyword(s):  
Fracture Surface ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Material Properties ◽  
Electron Spectroscopy ◽  
High Vacuum ◽  
Boundary Segregation ◽  
Grain Boundary Segregation ◽  
Local Concentration ◽  
The One

Grain boundary segregation is the process by which solute elements in a material diffuse to the grain boundaries, become trapped there, and increase their local concentration at the boundary over that in the bulk. As a result of this process this local concentration of the segregant at the grain boundary can be many orders of magnitude greater than the bulk concentration of the segregant. The importance of this problem lies in the fact that grain boundary segregation can affect many material properties such as fracture, corrosion, and grain growth.One of the best ways to study grain boundary segregation is with Auger electron spectroscopy. This spectroscopy is an extremely surface sensitive technique. When it is used to study grain boundary segregation the sample must first be fractured intergranularly in the high vacuum spectrometer. This fracture surface is then the one that is analyzed. The development of scanning Auger spectrometers have allowed researchers to first image the fracture surface that is created and then to perform analyses on individual grain boundaries.

Ultrastructural observations of the aorta of calves implanted with a mechanical left ventricular assist device

1990 ◽  
Vol 48 (3) ◽  
pp. 834-835
Author(s):  
J P Cassella ◽  
V Salih ◽  
T R Graham
Keyword(s):  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Left Ventricular ◽  
Aortic Tissue ◽  
Assist Device ◽  
Ventricular Assist ◽  
Transmission Electron ◽  
Left Ventricular Assist ◽  
Preliminary Study

Left ventricular assist systems are being developed for eventual long term or permanent implantation as an alternative to heart transplantation in patients unsuitable for or denied the transplant option. Evaluation of the effects of these devices upon normal physiology is required. A preliminary study was conducted to evaluate the morphology of aortic tissue from calves implanted with a pneumatic Left Ventricular Assist device-LVAD. Two 3 month old heifer calves (calf 1 and calf 2) were electively explanted after 128 days and 47 days respectively. Descending thoracic aortic tissue from both animals was removed immediately post mortem and placed into karnovsky’s fixative. The tissue was subsequently processed for transmission electron microscopy (TEM). Some aortic tissue was fixed in neutral buffered formalin and processed for routine light microscopy.

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