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Search Results: 1 - 10 of 289 matches for " Kae Takase "
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Green Innovation and Green Growth for Realizing an Affluent Low-Carbon Society  [PDF]
Ryuji Matsuhashi, Kae Takase
Low Carbon Economy (LCE) , 2015, DOI: 10.4236/lce.2015.64010
Abstract: After the Liberal Democratic Party won the election in 2012, Prime Minister Abe stated that the government would strive to implement aggressive abatement measures against global warming. Here, we define five types of green innovation and three types of green growth with the aim to clarify the necessary abatement measures against global warming. Next, for promoting green growth we propose a novel organization, which is referred to as the Green Power Moderator (GPM). Furthermore, we estimate the economic impact of the measures on the national economy and households in 2030, assuming that GPM successfully promotes green growth. For this purpose, we develop an energy and economy model, in which the bounded rationality of consumers is taken into consideration. Finally, we identify significant factors in establishing an affluent low-carbon society based on the results of our model simulation.
Prospective on Policies and Measures for Realizing a Secure, Economical and Low-Carbon Energy System——Taking the Effects of the Great East Japan Earthquake into Consideration  [PDF]
Ryuji Matsuhashi, Kae Takase, Koichi Yamada, Yoshikuni Yoshida
Low Carbon Economy (LCE) , 2011, DOI: 10.4236/lce.2011.24023
Abstract: The Great East Japan Earthquake devastated the eastern regions of Japan on this March. Due to the nuclear accident caused by the earthquake, Japan’s Cabinet stated to revise energy policies. This article aims at investigating whether we could establish a secure, economical and low-carbon energy system taking account of the serious situation after the Earthquake. For this purpose, we first evaluated possible technology options along with economic options. Then we integrated these options in a computable general equilibrium model for Japan so as to evaluate the impacts to national economy. As results, we quantified the relationships between energy security, quality of life and CO2 emissions.
Recent advances in choledochal cysts  [PDF]
Hiroyuki Tadokoro, Masaru Takase
Open Journal of Gastroenterology (OJGas) , 2012, DOI: 10.4236/ojgas.2012.24029
Abstract: Choledochal cysts are a congenital anomaly, and they show dilatation of the intra- or extrahepatic biliary tree. These cysts are uncommon in Western countries, but are not rare in Asian countries. Choledochal cysts are classified into five groups based on location or shape of the cysts. Types I and IV-A cysts are the most common types, which are associated with anomalous pancreaticobiliary junction (APBJ), but other cysts are not associated with APBJ. Types I and IV-A cysts appear to belong to a different category from other cysts embryologically. Type I and IV-A cysts accompany anomalies of the pancreas. Type I and IV-A cysts might occur when left ventral anlage persists, and with disturbed recanalization of the common bile duct. Endoscopic retrograde cholangiopancreatography is the gold standard for detecting APBJ, but it is an invasive procedure. Magnetic resonance cholangiopancreatography (MRCP) is a non-invasive imaging tool for detecting pancreatic and biliary trees. MRCP is the first-choice modality for diagnosing choledochal cysts and APBJ in pediatric patients. Cystoenterostomy is been performed because of high complication and mortality rates. Complete excision of the cysts with Roux-en-Y hepatojejunostomy is a standard procedure for choledochal cysts to prevent postoperative complications, including development of cancer. In this study, we review classification, pathogenesis, diagnosis, and treatment of types I and IV-A choledochal cysts.
Comparative Investigation of Alternative Negative Staining Reagents in Bacterial Morphological Study  [PDF]
Masaaki Minami, Hiroshi Takase
Journal of Biosciences and Medicines (JBM) , 2017, DOI: 10.4236/jbm.2017.510002
Abstract: Negative staining is an effective method that can be used for electron microscopic study to observe fine structural morphology without destruction of bacterial structure. Although uranium acetate is used worldwide as a general dyeing solution, it is extremely difficult to use it by a new purchase at a research institution because it falls under the nuclear regulation substance in Japan. Therefore, we examined alternative reagents for negative staining that could replace uranium acetate through bacterial observation with an electron microscope. Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Streptococcus pyogenes were examined by four stain reagents (phosphotungstic acid (PTA), EMstainer, TI blue, and uranium acetate). Pre cultured bacteria were stained with each stain reagents on a copper grid, washed with PBS, and observed with a transmission electron microscope. In the comparison between bacterial structures, the cell wall structure and bacterial flagella could be observed well in the order of PTA, EMstainer, and uranium acetate. With TI blue staining, flagella could be observed very poorly. In comparison between bacteria, gram negative bacteria such as Escherichia coli and Pseudomonas aeruginosa, could be observed well as compared with gram positive cocci such as Staphylococcus aureus and Streptococcus pyogenes. The uranium acetate looked very coarse in background particles. Since crystals tend to precipitate, TI blue also required filtering, and electron beams were absorbed by the agglomerated crystals, and the frequency of electronic burning occurred high frequency. In this study, there was clear difference in the observation conditions depending on the type of bacteria and the kind of the staining reagents. Especially, it was confirmed that good negative staining features of Pseudomonas aeruginosa by electron microscope were obtained by PTA and EMstainer staining. These alternative reagents are considered to be a candidate for a negative staining.
Transanal Endorectal Pull-through for Hirschsprung's Disease During the First Month of Life
Annals of Pediatric Surgery , 2010,
Abstract: Background/Purpose: Hirschsprung's disease (HD) is a common cause of bowel obstruction in the newborn period. Onestage surgery for HD is well established and the results are comparable or better than multistage surgery. The aim of this study was to test the feasibility and safety of transanal endorectal pull-through (TEPT) for management of HD during the neonatal period. Materials & Methods: twenty eight neonates having HD were treated with TEPT at pediatric surgery unit, Mansoura University Children's Hospital (MUCH) during the period from May 2007 to Jun 2009. Six cases were in need for concomitant laparotomy due to long segment disease. Endorectal mucosectomy was started one cm. above dentate line and continued till the peritoneal reflection. The affected bowel was resected and colo-anal anastomosis was performed with 4/0 absorbable sutures. Results: The mean operative time was 90±18 minutes. Blood transfusion was not needed. Oral feeding started 24-48 hours postoperatively and the mean hospital stay was 3-5 days. The commonest postoperative complication was perianal excoriations (64.3%), anastomotic leak occurred in one case. Two cases were in need for repeated dilatations while 4 cases presented with postoperative enterocolitis (EC). Conclusion: TEPT during the neonatal period is easy, bloodless, without visible scar and with short intraoperative time and postoperative hospital stay. Index Word: Hirschsprung's disease, transanal endorectal pull-through, neonates.
Management of Conjoined Twins During Neonatal Period
Annals of Pediatric Surgery , 2010,
Abstract: Background/Purpose: Conjoined twins are rare and complex anomalies of the newborn. It is reported in 1/50.000 to 1/100.000 live births. The aim of the study was to summarize the experiences gained during separation of 5 sets of conjoined twins with presentation of literature review. Materials & Methods: During the period from January 2003 to June 2009, 5 sets of Conjoined twins had been separated during the first month of life. Two sets were symmetrical while the other 3 sets were asymmetrical. Results: Urgent separation of 3 sets of conjoined twins had been performed due to respiratory embarrassment. Elective surgery was performed for the case presented as fetus in fetu and the case of thoraco- omphalopagus twins in which the shared liver was divided between both babies. The short term postoperative follow up revealed uneventful course of 6 children resulting from separation of 5 sets of conjoined twins. Conclusion: Parasitic twins and twins with sever anomalies incompatible with life in one of them are considered to be one person. Timing of separation and separation plan should be individualized according to the need of urgent separation and the degree of organ fusion. Index Word: conjoined twins, management, neonatal period.
The role of the dorsal raphé nucleus in reward-seeking behavior
Kae Nakamura
Frontiers in Integrative Neuroscience , 2013, DOI: 10.3389/fnint.2013.00060
Abstract: Pharmacological experiments have shown that the modulation of brain serotonin levels has a strong impact on value-based decision making. Anatomical and physiological evidence also revealed that the dorsal raphé nucleus (DRN), a major source of serotonin, and the dopamine system receive common inputs from brain regions associated with appetitive and aversive information processing. The serotonin and dopamine systems also have reciprocal functional influences on each other. However, the specific mechanism by which serotonin affects value-based decision making is not clear. To understand the information carried by the DRN for reward-seeking behavior, we measured single neuron activity in the primate DRN during the performance of saccade tasks to obtain different amounts of a reward. We found that DRN neuronal activity was characterized by tonic modulation that was altered by the expected and received reward value. Consistent reward-dependent modulation across different task periods suggested that DRN activity kept track of the reward value throughout a trial. The DRN was also characterized by modulation of its activity in the opposite direction by different neuronal subgroups, one firing strongly for the prediction and receipt of large rewards, with the other firing strongly for small rewards. Conversely, putative dopamine neurons showed positive phasic responses to reward-indicating cues and the receipt of an unexpected reward amount, which supports the reward prediction error signal hypothesis of dopamine. I suggest that the tonic reward monitoring signal of the DRN, possibly together with its interaction with the dopamine system, reports a continuous level of motivation throughout the performance of a task. Such a signal may provide “reward context” information to the targets of DRN projections, where it may be integrated further with incoming motivationally salient information.
Generalized coherent states for SU(n) systems
Kae Nemoto
Physics , 2000, DOI: 10.1088/0305-4470/33/17/307
Abstract: Generalized coherent states are developed for SU(n) systems for arbitrary $n$. This is done by first iteratively determining explicit representations for the SU(n) coherent states, and then determining parametric representations useful for applications. For SU(n), the set of coherent states is isomorphic to a coset space $SU(n)/SU(n-1)$, and thus shows the geometrical structure of the coset space. These results provide a convenient $(2n - 1)$--dimensional space for the description of arbitrary SU(n) systems. We further obtain the metric and measure on the coset space, and show some properties of the SU(n) coherent states.
Regular irreducible characters of a hyperspecial compact group and Weil representations over finite fields
Koichi Takase
Mathematics , 2015,
Abstract: A method to construct irreducible unitary representations of a hyperspecial compact subgroup of a reductive group over p-adic field with odd p is presented. Our method is based upon Cliffods theory and Weil representations over finite fields. It works under an assumption of the triviality of certain Schur multipliers defined for an algebraic group over a finite field. The assumption of the triviality has good evidences in the case of general linear groups and highly probable in regular cases in general. We will give several examples of classical groups where the Schur multipliers are actually trivial.
Regular characters of $GL_n(O)$ and Weil representations over finite fields
Koichi Takase
Mathematics , 2015,
Abstract: In this paper, we will point out a gap in the proof of a theorem of G.Hill (J. Algebra, 174 (1995), 610-635) and will give new arguments to give a remedy in the non-dyadic case modulo a conjecture on the triviality of certain Schur multiplier associated with a symplectic space over finite field. The new argument uses the Schr\"odinger representation of the Heisenberg group associated with a symplectic space over a finite field, and a simple application of Weil representation. This argument is applicable to the regular characters in general which include the cuspidal cases as well as the regular split cases.
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