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Development of Surgical Treatment for Vitreous Disease  [PDF]
Tatsuya Mimura, Hidetaka Noma, Hideharu Funatsu
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.311101
Abstract: Vitreous surgery has improved remarkably with various advances in surgical instruments and techniques. The two most important breakthrough in recent years have been the introduction of small-gauge pars plana vitrectomy (PPV) systems and new illumination devices. Compared with traditional 20-gauge PPV, sutureless small-gauge PPV appears to be safer, with a shorter operating time, less postoperative inflammation, less patient discomfort, and more rapid recovery of visual acuity. This article reviews recent progress in the surgical management of vitreous disease with a historical perspective.
Physicochemical Properties of the Soils of Wassaniya Forest Reserve Tangaza Local Government, Sokoto State
M Atiku, SS Noma
Nigerian Journal of Basic and Applied Sciences , 2011,
Abstract: A study was conducted on the physical and chemical properties of the soils of Wassaniya Forest Reserve in Tangaza Local Government Area of Sokoto State, Nigeria. The study area was divided into 4 main plots located at Wassaniya, Jimajimi, Yartagimba and Daiji purposively selected based on vegetation density and human interference. From each of the four main plots three sample plots of size 0.5ha were randomly selected and demarcated to serve as replicates. Four composite soil samples were collected at the depth of 0 to 15cm from each plot using a soil auger for laboratory analyses. Four other undisturbed soil samples were collected for bulk density determination using a core sampler. The soils at the four locations varied in texture from sandy loam (SL) at Yartagimba, clay loam (CL) at Wassaniya and Daiji to clay (C) at Jimajimi. The results indicated that the soils at Jimajimi had the highest moisture contents (9%) though not statistically significant. The highest pH value (6.94) was obtained in the soils of Jimajimi which are slightly alkaline compared with the soils of Yartagimba (5.47) as well as those at Wassaniya and Daiji with pH values of 4.23 which connotes acidic reaction. Yartagimba had the highest Bulk density (1.32Mg/m3), organic carbon (1.64g/kg) exchangeable potassium (0.88cmol./kg) as well as highest nitrogen (0.49g/kg) hence the soils are more fertile.
Macular sensitivity and morphology after intravitreal injection of triamcinolone acetonide for macular edema secondary to central retinal vein occlusion
Noma H, Mimura T
Clinical Ophthalmology , 2012, DOI: http://dx.doi.org/10.2147/OPTH.S37263
Abstract: cular sensitivity and morphology after intravitreal injection of triamcinolone acetonide for macular edema secondary to central retinal vein occlusion Case report (935) Total Article Views Authors: Noma H, Mimura T Published Date November 2012 Volume 2012:6 Pages 1901 - 1906 DOI: http://dx.doi.org/10.2147/OPTH.S37263 Received: 23 August 2012 Accepted: 06 October 2012 Published: 19 November 2012 Hidetaka Noma,1 Tatsuya Mimura2 1Department of Ophthalmology, Yachiyo Medical Center, Tokyo Women’s Medical University, Chiba, 2Department of Ophthalmology, Medical Center East, Tokyo Women’s Medical University, Tokyo, Japan Abstract: It has been reported that microperimetry is effective for evaluating macular function. The aim of this paper is to report and discuss changes seen in macular sensitivity and macular thickness after intravitreal injection of triamcinolone acetonide (IVTA) in two patients with macular edema and central retinal vein occlusion (CRVO). Two eyes from two patients with CRVO (one each with ischemic and nonischemic CRVO) received IVTA for macular edema. Microperimetry was performed to measure macular sensitivity within the central 4, 10, and 20 degree fields, while the macular thickness within these fields was measured by optical coherence tomography. The mean macular thickness and macular sensitivity within the central 4, 10, and 20 degree fields improved after IVTA in the patient with nonischemic CRVO. In contrast, the mean macular thickness and sensitivity within the central 4, 10, and 20 degree fields showed little change after IVTA in the patient with ischemic CRVO. IVTA improves macular sensitivity and morphology in nonischemic CRVO, so further evaluation of this treatment is justified.
ANALOGUE AND DIGITAL MINDSETS: SOME IMPLICATIONS FOR INTERCULTURAL COMMUNICATION BETWEEN WESTERN AND EASTERN ORGANISATIONS
Hiroko Noma,Joanna Crossman
Asian Academy of Management Journal , 2012,
Abstract: Globalising forces have given rise to new relationships between organisations operating in Eastern and Western cultural contexts. Despite the rich opportunities presented by globalisation, the literature indicates that managers are challenged by the complexity of intercultural communication. This scholarly paper discusses some implications of analogue and digital mindsets for the managers of organisations in which effective inter- cultural communication across Eastern and Western contexts is crucial. We do so by adopting a multidisciplinary approach to the phenomenon and suggesting how managers may capitalise on knowledge related to analogue and digital mindsets to foster creative and holistic approaches to communication.
Macular sensitivity and morphology after intravitreal injection of triamcinolone acetonide for macular edema secondary to central retinal vein occlusion
Noma H,Mimura T
Clinical Ophthalmology , 2012,
Abstract: Hidetaka Noma,1 Tatsuya Mimura21Department of Ophthalmology, Yachiyo Medical Center, Tokyo Women’s Medical University, Chiba, 2Department of Ophthalmology, Medical Center East, Tokyo Women’s Medical University, Tokyo, JapanAbstract: It has been reported that microperimetry is effective for evaluating macular function. The aim of this paper is to report and discuss changes seen in macular sensitivity and macular thickness after intravitreal injection of triamcinolone acetonide (IVTA) in two patients with macular edema and central retinal vein occlusion (CRVO). Two eyes from two patients with CRVO (one each with ischemic and nonischemic CRVO) received IVTA for macular edema. Microperimetry was performed to measure macular sensitivity within the central 4, 10, and 20 degree fields, while the macular thickness within these fields was measured by optical coherence tomography. The mean macular thickness and macular sensitivity within the central 4, 10, and 20 degree fields improved after IVTA in the patient with nonischemic CRVO. In contrast, the mean macular thickness and sensitivity within the central 4, 10, and 20 degree fields showed little change after IVTA in the patient with ischemic CRVO. IVTA improves macular sensitivity and morphology in nonischemic CRVO, so further evaluation of this treatment is justified.Keywords: central retinal vein occlusion, macular edema, triamcinolone acetonide, macular sensitivity
Markov Chain Monte Carlo for Arrangement of Hyperplanes in Locality-Sensitive Hashing
Yui Noma,Makiko Konoshima
Computer Science , 2013,
Abstract: Since Hamming distances can be calculated by bitwise computations, they can be calculated with less computational load than L2 distances. Similarity searches can therefore be performed faster in Hamming distance space. The elements of Hamming distance space are bit strings. On the other hand, the arrangement of hyperplanes induce the transformation from the feature vectors into feature bit strings. This transformation method is a type of locality-sensitive hashing that has been attracting attention as a way of performing approximate similarity searches at high speed. Supervised learning of hyperplane arrangements allows us to obtain a method that transforms them into feature bit strings reflecting the information of labels applied to higher-dimensional feature vectors. In this p aper, we propose a supervised learning method for hyperplane arrangements in feature space that uses a Markov chain Monte Carlo (MCMC) method. We consider the probability density functions used during learning, and evaluate their performance. We also consider the sampling method for learning data pairs needed in learning, and we evaluate its performance. We confirm that the accuracy of this learning method when using a suitable probability density function and sampling method is greater than the accuracy of existing learning methods.
Hyperplane Arrangements and Locality-Sensitive Hashing with Lift
Makiko Konoshima,Yui Noma
Computer Science , 2012,
Abstract: Locality-sensitive hashing converts high-dimensional feature vectors, such as image and speech, into bit arrays and allows high-speed similarity calculation with the Hamming distance. There is a hashing scheme that maps feature vectors to bit arrays depending on the signs of the inner products between feature vectors and the normal vectors of hyperplanes placed in the feature space. This hashing can be seen as a discretization of the feature space by hyperplanes. If labels for data are given, one can determine the hyperplanes by using learning algorithms. However, many proposed learning methods do not consider the hyperplanes' offsets. Not doing so decreases the number of partitioned regions, and the correlation between Hamming distances and Euclidean distances becomes small. In this paper, we propose a lift map that converts learning algorithms without the offsets to the ones that take into account the offsets. With this method, the learning methods without the offsets give the discretizations of spaces as if it takes into account the offsets. For the proposed method, we input several high-dimensional feature data sets and studied the relationship between the statistical characteristics of data, the number of hyperplanes, and the effect of the proposed method.
Locality-Sensitive Hashing with Margin Based Feature Selection
Makiko Konoshima,Yui Noma
Computer Science , 2012,
Abstract: We propose a learning method with feature selection for Locality-Sensitive Hashing. Locality-Sensitive Hashing converts feature vectors into bit arrays. These bit arrays can be used to perform similarity searches and personal authentication. The proposed method uses bit arrays longer than those used in the end for similarity and other searches and by learning selects the bits that will be used. We demonstrated this method can effectively perform optimization for cases such as fingerprint images with a large number of labels and extremely few data that share the same labels, as well as verifying that it is also effective for natural images, handwritten digits, and speech features.
Eclipse Hashing: Alexandrov Compactification and Hashing with Hyperspheres for Fast Similarity Search
Yui Noma,Makiko Konoshima
Computer Science , 2014,
Abstract: The similarity searches that use high-dimensional feature vectors consisting of a vast amount of data have a wide range of application. One way of conducting a fast similarity search is to transform the feature vectors into binary vectors and perform the similarity search by using the Hamming distance. Such a transformation is a hashing method, and the choice of hashing function is important. Hashing methods using hyperplanes or hyperspheres are proposed. One study reported here is inspired by Spherical LSH, and we use hypersperes to hash the feature vectors. Our method, called Eclipse-hashing, performs a compactification of R^n by using the inverse stereographic projection, which is a kind of Alexandrov compactification. By using Eclipse-hashing, one can obtain the hypersphere-hash function without explicitly using hyperspheres. Hence, the number of nonlinear operations is reduced and the processing time of hashing becomes shorter. Furthermore, we also show that as a result of improving the approximation accuracy, Eclipse-hashing is more accurate than hyperplane-hashing.
Comparison of Decontamination Efficacy between the Rapid Hygrothermal Pasteurization and Sodium Hypochlorite Treatments  [PDF]
Dusida Tirawat, Hiromizu Kunimoto, Seiji Noma, Noriyuki Igura, Mitsuya Shimoda
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.46082
Abstract: We developed a novel rapid hygrothermal pasteurization (RHP) method using saturated water vapor with a dew point of 100℃. The aim of this paper is to compare the effect of RHP treatment versus conventional sodium hypochlorite (NaClO) treatments on inactivation of natural mesophilic bacteria and quality attributes on fruits and vegetables. The RHP treatment was performed within a second by free-falling samples (cabbage, cucumber, carrot, bell pepper, pineapple and melon) through cylindrical processing chamber filled with steam. NaClO treatment was performed by washing samples with NaClO solution (100 mg/mL of free chlorine (pH 7), for 1 min). The RHP treatment showed a significantly higher inactivation effect than NaClO treatment on all tested samples. The RHP treatment had a slightly larger influence on color and vitamin C content than NaClO treatment in cabbage. Furthermore, the effects of treatment time and operated temperature were also determined using microbial model system. Elongation of treatment time did not significantly increase the microbial inactivation effect. Lowering of operated temperature by mixing air into steam tended to decrease the inactivation effect. From these results, RHP treatment could be used as an alternative method for decontaminating microorganisms on fruits and vegetables, except on leafy vegetable. In addition, it is suggested that microbial inactivation by RHP treatment was achieved through the initial condensation stage of water vapor on sample surface. By contrast, interfusion of air disturbed the effective condensation of water vapor.
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