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Remarks on the Erroneous Dispersion Surfaces From a Pair of a Hyperbolic Branch and An Elliptical Arc of the Intersected Two Laue Spheres Based on the Usual Crude Approximation  [PDF]
Tetsuo Nakajima
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.23022
Abstract: In almost all previous works, the hyperbolic dispersion surfaces of the central proper quadrics have been crudely derived from the degree of reduction from the bi-quadratic equation by use of some roughly indefinable approximate relations. Moreover, neglecting the high symmetry of the hyperbola, both the branches have been approximated on the asymmetric surfaces composed of a pair of a branch of the hyperbola and a vertex of the ellipse without the presentation of reasonable evidence. Based upon the same dispersion surfaces equation, a new original gapless dispersion surfaces could be rigorously introduced without crude omission of even a term in the bi-quadratic equation based upon usual analogy with the extended band theory of solid as the close approximation to the truth.
Migration, Employment, and Industrial Development in Japan  [PDF]
Tetsuya Nakajima
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.48083
Abstract: Industrial development in Japan is accompanied by massive migration from agricultural to industrial areas. In a modified Harrod-Domar model, this paper compares two steady states, the first and the second, which emerge before and after the termination of such migration, respectively. Then, the paper shows that employment rates must be lower in the second steady state. Further, by examining the effects of fiscal policy, the paper shows that the balanced budget multiplier exceeds unity, and fiscal policy raises households’ disposable income and consumption.
Dual-Energy Subtraction X-Ray Digital Tomosynthesis: Basic Physical Evaluation  [PDF]
Tsutomu Gomi, Masahiro Nakajima
Open Journal of Medical Imaging (OJMI) , 2012, DOI: 10.4236/ojmi.2012.23021
Abstract: The present study was performed to determine the potential of applying dual-energy subtraction (DES) digital tomo-synthesis to basic physical evaluations. Volumetric X-ray DES digital tomosysnthesis was used to obtain an image of a detectability phantom (an artificial lesion). The image quality of DES digital tomosynthesis was compared to that of DES radiography. The purpose of this study was to determine enhanced visibility quantified in terms of the contrast- to-noise ratio, figure-of-merit, and root-mean-square error. In the in-focus plane, the image quality is better by DES digital tomosynthesis than by DES radiography. The potential usefulness of DES digital tomosynthesis for evaluating a detectability phantom was demonstrated. Further studies are required to determine the ability of DES digital tomosyn-thesis to quantify the spatial relationships between the artificial lesion components of these devices, as well as to iden- tify lesions with diagnostic consequences.
Recent Advances in Dermatitis Herpetiformis
Kimiko Nakajima
Clinical and Developmental Immunology , 2012, DOI: 10.1155/2012/914162
Abstract: Dermatitis herpetiformis is an autoimmune bullous disease that is associated with gluten sensitivity which typically presents as celiac disease. As both conditions are multifactorial disorders, it is not clear how specific pathogenetic mechanisms may lead to the dysregulation of immune responses in the skin and small bowel, respectively. Recent studies have demonstrated that IgA and antibodies against epidermal transglutaminase 3 play an important role in the pathogenesis of dermatitis herpetiformis. Here, we review recent immunopathological progress in understanding the pathogenesis of dermatitis herpetiformis.
The Efficacy of the EUS for the Detection of Recurrent Disease in the Anastomosis of Colon
Shunichi Nakajima
Diagnostic and Therapeutic Endoscopy , 2001, DOI: 10.1155/dte.7.149
Abstract: Patients who underwent surgical resection of an advanced colorectal cancer during the period from June 1982 to July 2001 were examined for evidence of no anastomotic recurrence or recurrent lesions through combination of endoscopic ultrasonography (EUS) with endoscopy. Included in this study were 11 patients with recurrence and 36 patients without recurrence, 47 patients in all. Endoscopy revealed stenosis in 81.8% of patients with ana anastomotic recurrence, erosion including cancer exposure in 81.8% and submucosal tumor-like elevation in 45.5%. In the group of patients without recurrence it revealed stenosis in 13.9% of patients, erosion in 22.2%, and a scar-like change in 77.8%. There was a significant difference between the two groups in each change. EUS, on the other hand, revealed localized hypertrophy of the region extending from the submucosa to the mp due to edema early in the postoperative course. The rate of definitive diagnosis with EUS was 100%, compared to 90.1% for endoscopy. The results of this study indicate that EUS is helpful in detecting anastomotic recurrence of colorectal cancer.
Testing the seesaw mechanism at collider energies in the Randall-Sundrum model
Nakajima, Hiroto
High Energy Physics - Phenomenology , 2007,
Abstract: The Randall-Sundrum model with gauge fields and fermions in the bulk has several attractive features including the gauge coupling unification, a candidate for the dark matter, and an explanation for the hierarchical Yukawa couplings. In this paper, we point out that the 1st Kaluza-Klein modes of right-handed neutrinos may be produced at colliders, for both Dirac and Majorana neutrino cases. Furthermore, we can see whether the neutrino masses are Dirac type or Majorana type from the mass spectrum of KK particles.
Quiver Varieties and Branching
Hiraku Nakajima
Symmetry, Integrability and Geometry : Methods and Applications , 2009,
Abstract: Braverman and Finkelberg recently proposed the geometric Satake correspondence for the affine Kac-Moody group Gaff [Braverman A., Finkelberg M., arXiv:0711.2083]. They conjecture that intersection cohomology sheaves on the Uhlenbeck compactification of the framed moduli space of Gcpt-instantons on $R^4/Z_r$ correspond to weight spaces of representations of the Langlands dual group $G_{aff}^{vee}$ at level $r$. When $G = SL(l)$, the Uhlenbeck compactification is the quiver variety of type $sl(r)_{aff}$, and their conjecture follows from the author's earlier result and I. Frenkel's level-rank duality. They further introduce a convolution diagram which conjecturally gives the tensor product multiplicity [Braverman A., Finkelberg M., Private communication, 2008]. In this paper, we develop the theory for the branching in quiver varieties and check this conjecture for $G = SL(l)$.
Multidisciplinary Pharmacotherapeutic Options for Nonalcoholic Fatty Liver Disease
Kei Nakajima
International Journal of Hepatology , 2012, DOI: 10.1155/2012/950693
L’opinion dissidente de Pal et le révisionnisme historique dans le Japon d’après-guerre The dissentient judgment of Pal and historical revisionism in Postwar Japan
Takeshi Nakajima
Droit et Cultures , 2010,
Abstract: Dans son opinion dissidente au procès de T ky (le Tribunal militaire international pour l’Extrême-Orient), le juge indien Radhabinhod Pal avait contesté le bien-fondé des notions de crime contre la paix et de crimes contre l’humanité élaborées par la Charte du tribunal qui furent utilisées pour condamner les hauts responsables japonais comme criminels de guerre de classe A . Considérant que ces notions relèvent d’une législation ex post facto, il estima qu’il e t été préférable de s’en tenir à la notion existante de crimes de guerre . Faute de quoi, au lieu de servir la justice, le procès de Tokyo cautionna selon lui l’idée qu’il suffirait de sortir vainqueur d’un conflit armé pour pouvoir imposer la loi de manière arbitraire. Au Japon, cette opinion se vit peu à peu durcie, puis détournée de sa visée initiale, par un courant de plus en plus outrageusement révisionniste. Cet article réexamine les points essentiels de l’argumentation de Pal avant d’analyser la fa on dont les révisionnistes japonais s’en sont emparée. In his dissenting judgment in the Tokyo trial (the International Military Tribunal for the Far East), the Indian judge Radhabinhod Pal had challenged the validity of the concepts of "crime against peace" and "crime against humanity" developed by the Charter of the court and which were used to condemn the Japanese officials as "war criminals category A". Whereas these concepts are subject to ex post facto legislation, he felt it was better to stick to the existing concept of "war crimes". Failing that, instead of justice, the trial of Tokyo according to endorse the idea that it was enough to win an armed conflict to impose the law in an arbitrary manner. In Japan, this opinion is gradually tightened, then diverted from its original purpose, by a stream of more and more outrageously revisionist. This article reviews the essential points of the argument of Pal before analyzing how the Japanese attacked revisionists seized.
Multidisciplinary Pharmacotherapeutic Options for Nonalcoholic Fatty Liver Disease
Kei Nakajima
International Journal of Hepatology , 2012, DOI: 10.1155/2012/950693
Abstract: Nonalcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH) are multidisciplinary liver diseases that often accompany type 2 diabetes or metabolic syndrome, which are characterized by insulin resistance. Therefore, effective treatment of type 2 diabetes and metabolic syndrome should target not only the cardiometabolic abnormalities, but also the associated liver disorders. In the last decade, it has been shown that metformin, thiazolidinediones, vitamin E, ezetimibe, n-3 polyunsaturated fatty acids, renin-angiotensin system (RAS) blockers, and antiobesity drugs may improve hepatic pathophysiological disorders as well as clinical parameters. Accordingly, insulin sensitizers, antioxidative agents, Niemann-Pick C1-like 1 (NPC1L1) inhibitors, RAS blockers, and drugs that target the central nervous system may represent candidate pharmacotherapies for NAFLD and possibly NASH. However, the efficacy, safety, and tolerability of long-term treatment (potentially for many years) with these drugs have not been fully established. Furthermore, clinical trials have not comprehensively examined the efficacy of lipid-lowering drugs (i.e., statins, fibrates, and NPC1L1 inhibitors) for the treatment of NAFLD. Although clinical evidence for RAS blockers and incretin-based agents (GLP-1 analogs and dipeptidyl peptidase-4 inhibitors) is also lacking, these agents are promising in terms of their insulin-sensitizing and anti-inflammatory effects without causing weight gain. 1. Introduction Over the past two decades, the prevalence of metabolic abnormalities such as type 2 diabetes and metabolic syndrome (MetS) has been increasing worldwide together with the escalating obesity pandemic [1–3]. Abdominal obesity, in particular, substantially increases the risk of developing type 2 diabetes, MetS, and fatty liver. According to the American Association for the Study of Liver Diseases (AASLD), fatty liver in the absence of a chronic increase in alcohol intake (i.e., alcohol intake is <20?g?ethanol/day) is referred to as nonalcoholic fatty liver disease (NAFLD) [4]. According to the AASLD’s practice guidelines for NAFLD [5], NAFLD is histologically subdivided into nonalcoholic fatty liver (NAFL) and a more severe condition, nonalcoholic steatohepatitis (NASH), which sometimes advances over several decades to life-threatening hepatic cirrhosis and hepatocellular carcinoma. The prevalence of NAFLD, as detected by ultrasound, is up to 30–46% in developed countries and nearly 10% in developing nations, making NAFLD the most common liver disorder worldwide [5, 6].
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