247 research outputs found
Detecting Vital Documents in Massive Data Streams
Existing knowledge bases, includingWikipedia, are typically written and maintained by a group of voluntary editors. Meanwhile, numerous web documents are being published partly due to the popularization of online news and social media. Some of the web documents, called "vital documents", contain novel information that should be taken into account in updating articles of the knowledge bases. However, it is practically impossible for the editors to manually monitor all the relevant web documents. Consequently, there is a considerable time lag between an edit to knowledge base and the publication dates of such vital documents. This paper proposes a realtime detection framework of web documents containing novel information flowing in massive document streams. The framework consists of twostep filter using statistical language models. Further, the framework is implemented on the distributed and faulttolerant realtime computation system, Apache Storm, in order to process the large number of web documents. On a publicly available web document data set, the TREC KBA Stream Corpus, the validity of the proposed framework is demonstrated in terms of the detection performance and processing time
Suzaku Discovery of a Hard Component Varying Independently of the Power-Law Emission in MCG-6-30-15
Focusing on hard X-ray variability, we reanalyzed Suzaku data of Type I
Seyfert galaxy MCG-6-30-15 obtained in 2006. Intensity-sorted spectroscopy and
a principal component analysis consistently revealed a very hard component that
varies independently of the dominant power-law emission. Although the exact
nature of this hard component is not yet identified, it can be modeled as a
power-law with a photon index ~2 affected by a partial covering absorption, or
as a thermal Comptonization emission with a relatively large optical depth.
When this component is included in the fitting model, the time-averaged 2.5-55
keV spectrum of MCG-6-30-15 can be reproduced successfully by invoking a mildly
broadened iron line with its emission region located at > 8 times the
gravitational radii from the central black hole, and a moderate reflection with
a covering fraction of ~3.4. This result implies that the solution of a highly
spinning black hole in MCG-6-30-15, obtained by Miniutti et al. (2007, PASJ,
59, S315) using the same Suzaku data, is a model dependent result
Hematogenous extraneural metastasis of the germinomatous component of a pineal mixed germ cell tumor
A 23-year-old man presented with a mass in the pineal region and obstructive hydrocephalus. A neuroendoscopic biopsy for the lesion, ventriculoperitoneal (VP) shunting, and focal irradiation were conducted as initial treatment. Histological diagnosis of the biopsy specimen was germinoma. He underwent further irradiation and two tumor resections. Histological diagnosis was mature teratoma without a germinomatous component. After serial treatments, the intracranial lesion was controlled. However, 14 months after presentation, extraneural lesions were confirmed in the posterior mediastinum and retroperitoneal space. The biopsy specimen of the retroperitoneal space lesion was histologically diagnosed as germinoma. Although chemotherapy with cisplatin and etoposide was undertaken, extraneural lesions ware uncontrollable and he died. At autopsy, extraneural lesions were confirmed in the posterior mediastinum, retroperitoneal space, and right lung. Histological diagnosis of extraneural lesions was germinoma. This case was considered to be a pineal mixed germ cell tumor mainly consisting of germinoma and mature teratoma, which caused hematogenous metastasis of the germinoma component. Systemic chemotherapy and irradiation for primary lesions as an initial treatment is important to cure the primary lesion and prevent extraneural metastasis.ArticleBRAIN TUMOR PATHOLOGY. 29(4):245-250 (2012)journal articl
Genetic Factors Associated with Heading Responses Revealed by Field Evaluation of 274 Barley Accessions for 20 Seasons
Heading time is a key trait in cereals affecting the maturation period for optimal grain filling before harvest. Here, we aimed to understand the factors controlling heading time in barley (Hordeum vulgare). We characterized a set of 274 barley accessions collected worldwide by planting them for 20 seasons under different environmental conditions at the same location in Kurashiki, Japan. We examined interactions among accessions, known genetic factors, and an environmental factor to determine the factors controlling heading response. Locally adapted accessions have been selected for genetic factors that stabilize heading responses appropriate for barley cultivation, and these accessions show stable heading responses even under varying environmental conditions. We identified vernalization requirement and PPD-H1 haplotype as major stabilizing mechanisms of the heading response for regional adaptation in Kurashiki
Fluorescence-guided bone resection by using Visually Enhanced Lesion Scope in diffuse chronic sclerosingosteomyelitis of the mandible: clinical and pathological evaluation
Diffuse chronic sclerosingosteomyelitis (DCSO) is a refractory disease, becausethe etiology and pathogenesis remain poorly understood and to determine the border betweenunhealthy boneandhealthybone is difficult. However,
progressive inflammation, clinical symptoms and a high recurrence rate of DCSO were the reasons for surgical
treatment. We report a case of a 66-year old woman with DCSO of the right side of mandible who was treated with
hemimandibulectomy and simultaneous reconstruction by vascularized free fibula flap. After preoperative administration of minocycline for 1 month, the bone fluorescence was successfully monitored by using a Visually Enhanced Lesion Scope (VELscope®). Intraoperatively, we could determine the resection boundaries. We investigated
the clinical and histopathological findings. The fluorescence findings were well correlated with histopathological
findings. Using a VELscope®was handy and useful to determine the border between DCSO lesion andhealthybone.
The free fibula flap under the minocycline-derived bone fluorescence by using a VELscope®offered a good quality
of mandibular bone and the successful management of an advanced and refractory DCSO
Alternative redo sternotomy in a patient with tracheostoma and patent grafts.
We describe a redo mitral valve replacement operation in a 71-year-old man with a tracheostoma and patent bypass grafts to the coronary arteries. Preoperative investigations revealed that the patent right internal thoracic artery graft ran directly under the sternum just anterior to the ascending aorta, and a saphenous vein graft was adhering to a surgical wire. To prevent injury to the patent grafts and cardiac structures, and to avoid communication with the tracheostoma, the redo procedure was performed via an anterior minithoracotomy combined with a low T-shaped partial sternotomy. The reoperation was successfully completed without any complications
Cosmological Baryon Sound Waves Coupled with the Primeval Radiation
The fluid equations for the baryon-electron system in an expanding universe
are derived from the Boltzmann equation. The effect of the Compton interaction
is taken into account properly in order to evaluate the photon-electron
collisional term. As an application, the acoustic motions of the
baryon-electron system after recombination are investigated. The effective
adiabatic index is computed for sound waves of various wavelengths,
assuming the perturbation amplitude is small. The oscillations are found to be
dumped when changes from between 1 (for an isothermal process) to 5/3
(for an adiabatic process).Comment: 20 pages, Revtex, Accepted for publication in Phys. Rev.
Alterations in 18F-FDG accumulation into neck-related muscles after neck dissection for patients with oral cancers
Background:
18
F-fluoro-2-deoxy-D-glucose (
18
F-FDG) accumulations are commonly seen in the neck-related muscles of the surgical and non-surgical sides after surgery with neck dissection (ND) for oral cancers, which leads
to radiologists having difficulty in diagnosing the lesions. To examine the alterations in
18
F-FDG accumulation in
neck-related muscles of patients after ND for oral cancer.
Material and Methods:
18
F-FDG accumulations on positron emission tomography (PET)-computed tomography
(CT) in neck-related muscles were retrospectively analyzed after surgical dissection of cervical lymph nodes in
oral cancers.
Results: According to the extent of ND of cervical lymph nodes, the rate of patients with
18
F-FDG-PET-positive areas increased in the trapezius, sternocleidomastoid, and posterior neck muscles of the surgical and/or non-surgical
sides. In addition, SUVmax of
18
F-FDG-PET-positive areas in the trapezius and sternocleidomastoid muscles were
increased according to the extent of the ND.
Conclusions: In evaluating
18
F-FDG accumulations after ND for oral cancers, we should pay attention to the
18
F-FDG
distributions in neck-related muscles including the non-surgical side as false-positive finding
- …