Enhancement of photoresponse for InGaAs infrared photodetectors using plasmonic WO3-x/CsWO3-xnanocrystals.

Fast and accurate detection of light in the near-infrared (NIR) spectral range plays a crucial role in modern society, from alleviating speed and capacity bottlenecks in optical communications to enhancing the control and safety of autonomous vehicles through NIR imaging systems. Several technological platforms are currently under investigation to improve NIR photodetection, aiming to surpass the performance of established III-V semiconductor p-i-n (PIN) junction technology. These platforms include-grown inorganic nanocrystals (NCs) and nanowire arrays, as well as hybrid organic-inorganic materials such as graphene-perovskite heterostructures.

Immediate postprocedure anticoagulation with factor Xa inhibitors of venous stents for nonthrombotic venous lesions does not increase stent patency.

Background: Many clinicians will prescribe anticoagulation therapy for patients after iliac vein stenting to prevent early or late stent thrombosis. At present, it is unknown whether therapeutic anticoagulation has any effect on stent patency. Thus, we assessed the role of short-term anticoagulation on iliac vein stent patency in patients with nonthrombotic iliac vein lesions (NIVLs).

In-Plane Anisotropic Photoconduction in Nonpolar Epitaxial a-Plane GaN.

Nonpolar a-plane GaN epitaxial films were grown on an r-plane sapphire using the plasma-assisted molecular beam epitaxy system, with various nitrogen plasma power conditions. The crystallinity of the films was characterized by high-resolution X-ray diffraction and reciprocal space mapping. Using the X-ray "rocking curve-phi scan", [0002], [1-100], and [1-102] azimuth angles were identified, and interdigitated electrodes along these directions were fabricated to evaluate the direction-dependent UV photoresponses.

InN Quantum Dot Based Infra-Red Photodetectors.

Self-assembled InN quantum dots (QDs) were grown on Si(111) substrate using plasma assisted molecular beam epitaxy (PA-MBE). Single-crystalline wurtzite structure of InN QDs was confirmed by X-ray diffraction. The dot densities were varied by varying the indium flux.

Mini posterior lumbar interbody fusion with presacral screw stabilization in early lumbosacral instability.

Background: Surgical options for the management of early lumbosacral spondylolisthesis and degenerative disc disease with instability vary from open lumbar interbody fusion with transpedicular fixation to a variety of minimal access fusion and fixation procedures. We have used a combination of micro discectomy and axial lumbosacral interbody fusion with presacral screw fixation to treat symptomatic patients with lumbosacral spondylolisthesis or lumbosacral degenerative disc disease, which needed surgical stabilization. This study describes the above technique along with analysis of results.

Extradural Spinal Metastasis of Adenoid Cystic Carcinoma (ACC): A Case Report.

Adenoid cystic carcinoma (ACC) is a rare malignant tumour of the major salivary glands. It accounts for 10-15% of all salivary gland tumours and 1% of all head and neck tumours. Surgical resection followed by radiation is the choice of treatment for ACC.

Endoscopic excision of a lateral ventricular epidermoid-A case report of a novel technique.

Introduction: Epidermoids of the lateral ventricle are relatively rare tumours. As these tumours are soft and relatively avascular, they appear to be ideally suited for endoscopic surgical excision. At present the instruments available are specifically designed for endoscopic intra ventricular surgeries, limitations being inability to rapidly debulk the tumour and achieve adequate haemostasis.

Sylvian cistern arachnoid cyst--a rare cause of precocious puberty.

Precocious puberty still remains an elusive diagnosis in the majority of patients. Infrequently, lesions of the central nervous system are associated with sexual precocity. Depending on their location, these cysts may affect many systems, however, there is little information concerning their involvement in endocrinological disorders.

Intraspinal hydatidosis with retroperitoneal extension: an uncommon location.

Hydatidosis is a ubiquitous disease that is endemic in India. It most commonly involves the liver (75%) and lungs (15%) with only 10% occurring in the rest of the body. Primary hydatid cyst in the spinal canal is extremely rare.

Reduction techniques in the management of atlantoaxial subluxation.

Background: The traditional approach to atlantoaxial subluxation which is irreducible after traction is transoral decompression and reduction or odontoid excision and posterior fixation. Transoral approach is associated with comorbidities. However using a posterior approach a combination of atlantoaxial joint space release and a variety of manipulation procedures, optimal or near optimal reduction can be achieved.

Corynebacterium minutissimum infecting pseudomeningocele: a rare case.

Invasive infections by Corynebacterium minutissimum are rarely documented. The significance of laboratory isolation of this bacterium from a sterile specimen such as cerebrospinal fluid is difficult to determine as it usually colonizes the skin. However, repeated isolation in a clinical setting should be treated appropriately.

Pencil in the brain: a case of temporal lobe abscess following an intracranial penetrating pencil injury.

The case of a 7-year-old girl with an intracranial penetrating injury due to a pencil is presented. The difficulties in diagnosis and the need for a high degree of suspicion and for prompt adequate surgical treatment are highlighted.

Management of traumatic atlanto-axial instability: A retrospective study of eight cases.

Background: C1 lateral mass-C2 transpedicular fixation is an accepted surgical procedure of choice in a large number of cases with traumatic atlanto-axial instability. However, bony and vascular anomalies can predispose to unacceptably high risk with this procedure, And hence are the contraindications for this procedure. The purpose of this study is to analyze the clinical and radiological results in such cases for which only unilateral fixation has been performed in cases where bilateral fixation could not be performed due to various reasons.

Sub-axial cervical spine injuries: Modified Stellerman's algorithm.

Background: Global fusion is recommended in sub-axial cervical spine injuries with retrolisthesis, translation rotation injuries associated with end plate or tear drop fractures. We propose a modification of Stellerman's algorithm which we have used where in patients are primarily treated via anterior decompression and fixation. Global fusion was done only in cases where post-decompression traction does not achieve reduction in cases with locked facets.

Odontoid fractures: A retrospective analysis of 53 cases.

Background: The management of odontoid fracture has evolved but controversy persists as to the best method for Type II odontoid fractures with or without atlantoaxial (AA) instability. The anterior odontoid screw fixation can be associated with significant morbidity while delayed odontoid screw fixation has shown to be associated with reasonable good fusion rates. We conducted a retrospective analysis to evaluate the outcome of a trial of conservative management in type II odontoid fractures without atlantoaxial instability (Group A) followed by delayed odontoid screw fixation in cases in which fusion was not achieved by conservative treatment.