Characteristics of Novel Triplet Spun Yarns Made from Fibers of Differing Fineness

In order to reduce the hairiness of ring spun yarns and to develop novel multilayered spun yarns, we investigated the properties of triplet spun yams made from the same size of three rovings with different fiber fineness using an experimental ring spinning frame. The results were: (1) different fiber fineness triplet spun yarn, a new yarn made by combination staple fibers of three different fineness into one twisting process; (2) although triplet spun yarn had a side-by-side structure in the cross-section, the central angle made by the assembly of finer fibers was smaller than that of coarser fibers; and (3) in comparison with single yam, triplet spun yarn had less hairiness and greater strength because of the lower spinning tension of each strand and the twist propagation in each strand.ArticleTEXTILE RESEARCH JOURNAL. 79(10):947-952 (2009)journal articl

Exploratory Work on the Spinning Condition of the Structure of Staple-core Twin-spun Yarns

In order to design and develop novel-spun yarns with good functionality, we investigated how to construct a core-sheath structure adapted from a multilayered structure of triplet-spun yarn and/or made from a twin-spun yarn with core-staple fibers using an experimental ring-spinning frame. The results were follows: (1) staple-core twin-spun yarn, a new yarn, could be made by applying the production method of triplet-spun yarn and/or combining the production methods of core-spun yarn and twin-spun yarn into one twisting process; (2) by adopting three rovings made from fibers of differing length and fineness, the resulting triplet-spun yarn had the core-sheath structure within an adequate spinning condition; (3) for the construction of core-sheath structure, it is important that there be a difference between spinning tensions at the center and the two sides of the drafted fiber strands or drafted strand lengths from the front roller nip to the point of yarn formation by controlling the distance of the supply rovings and the yarn's twist factor.ArticleTEXTILE RESEARCH JOURNAL. 80(11):1056-1064 (2010)journal articl

Mucin-hypersecreting bile duct neoplasm characterized by clinicopathological resemblance to intraductal papillary mucinous neoplasm (IPMN) of the pancreas

<p>Abstract</p> <p>Background</p> <p>Although intraductal papillary mucinous neoplasm (IPMN) of the pancreas is acceptable as a distinct disease entity, the concept of mucin-secreting biliary tumors has not been fully established.</p> <p>Case presentation</p> <p>We describe herein a case of mucin secreting biliary neoplasm. Imaging revealed a cystic lesion 2 cm in diameter at the left lateral segment of the liver. Duodenal endoscopy revealed mucin secretion through an enlarged papilla of Vater. On the cholangiogram, the cystic lesion communicated with bile duct, and large filling defects caused by mucin were observed in the dilated common bile duct. This lesion was diagnosed as a mucin-secreting bile duct tumor. Left and caudate lobectomy of the liver with extrahepatic bile duct resection and reconstruction was performed according to the possibility of the tumor's malignant behavior. Histological examination of the specimen revealed biliary cystic wall was covered by micropapillary neoplastic epithelium with mucin secretion lacking stromal invasion nor ovarian-like stroma. The patient has remained well with no evidence of recurrence for 38 months since her operation.</p> <p>Conclusion</p> <p>It is only recently that the term "intraductal papillary mucinous neoplasm (IPMN)," which is accepted as a distinct disease entity of the pancreas, has begun to be used for mucin-secreting bile duct tumor. This case also seemed to be intraductal papillary neoplasm with prominent cystic dilatation of the bile duct.</p

含糖酸化鉄注射液の長期投与でFGF23関連低リン血症性骨軟化症を来たしたクローン病の１例

症例は50歳代，男性．クローン病で２年前に右半結腸切除術，小腸部分切除を施行．術後に他院にてアダリムマブを導入され，クローン病は臨床的寛解の状態であった．４か月前より下肢を中心とした疼痛が出現した．アダリムマブによる薬剤起因性ループスあるいは腸炎性関節炎を疑い，２か月前よりアダリムマブ投与を中止し，プレドニゾロンの内服を開始するも改善を認めなかった．血液検査にて，低リン血症と高アルカリフォスファターゼ血症を認め，精査治療目的で当院に紹介入院となった．骨塩定量検査にて骨密度の低下を，骨シンチグラフィーで疼痛を認める骨への多発取り込みを認め，骨軟化症と診断した．血清のfibroblast growth factor 23（FGF23）が175pg/ml と高値であり，入院前まで定期的に使用されていた含糖酸化鉄注射液による，FGF23関連低リン血症性骨軟化症と診断した．含糖酸化鉄注射液投与を中止し，リン製剤とビタミンD 製剤の投与を開始したところ，徐々に低リン血症と高アルカリフォスファターゼ血症の改善を認めた．その後の経過は良好で，FGF23値は徐々に低下を示し，下肢を中心とした疼痛は軽快し，退院した．長期的に含糖酸化鉄注射液を投与する場合は，FGF23関連低リン血症の早期発見のため，血中リン濃度を定期的に測定する必要がある．The case is a man in his 50s. He underwent operations of right half colon resection and small intestine segmental resection due to Crohn’s disease two years ago. After surgery, Adalimumab was introduced in other hospital, and he was a state of the clinical remission in Crohn’s disease. The sharp pain mainly on lower limbs develops from four months ago. We doubted drug origin-related lupus with Adalimumab or enteritis-related joint pain. Therefore, we stopped Adalimumab injection and started internal use of the prednisolone, however the symptoms did not improve and had continued for two months.Laboratory test showed hypophosphatemia and hyperphosphatasemia and then he was transported to our hospital. Bone mineral quantity showed bone salt decrease and bone scan showed increased uptakes in multiple bones. Fibroblast growth factor23 (FGF23) of the serum was high (175pg/ml), and we diagnosed him FGF23-mediated hypophosphatemic osteomalasia induced by prolonged administration of saccharated ferric acid.Saccharated ferric acid has regularly been used until hospitalization. After stopping the ferric acid injection, and taking phosphorus and vitamin D, hypophosphatemia and hyperphosphatasemia was gradually improved. FGF23 level gradually reduced, and the sharp pain mainly on lower limbs was relieved, and it became a discharge. Regular measurement of serum phosphorus concentration is necessary for early detection of the FGF23-related hypophosphatemia in patients with long term use of saccharated ferric acid

当院における便潜血陽性者に対する大腸CT(CTコロノグラフィー)検査の有用性:大腸がん検診への導入と課題

大腸がん検診におけるスクリーニング検査としての大腸CT(CT colonography: CTC)検査の有用性を検討するために,当院における便潜血陽性者に対するCTCと大腸内視鏡検査の精度比較を行った.2009年7月から2014年1月までに川崎医科大学附属病院で施行されたCTC検査673件中,スクリーニング目的で行われた411件の中で便潜血陽性者に対して行われた183名を対象とした.全例CTC検査と同日に全大腸内視鏡検査も行った.対象とする病変は内視鏡観察あるいは病理組織学的に腺腫,がんと診断されたものとした.CTCの前処置は,経口腸管洗浄剤に水溶性造影剤による標識(タギング)を付けて行った.CT装置は16列Multi-slice CT(MSCT),腸管拡張は自動炭酸ガス注入器を使用した.CTC読影は,まず仮想内視鏡(3D)で行い,後に多断面再構成像(Multi-planar reconstruction: MPR 像(2D))を行う3D primary 法で行った.183名(男性98名,女性85名,年齢40～86歳,平均年齢62.1歳±0.8歳)のうち,病変を認めなかったのは87名(47.5%)であり,病変を認めたのは96名(53%)であった.総病変数は191個であり,うち6mm以上の病変は77個(40%)で,そのうち10mm以上のものは46個(24%)であった.大腸癌は25例(全病変中13%)で,うち腺腫内癌16例(全病変中8%)であった.側方発育型腫瘍は8例(4%)(大きさ平均17mm)であった.病変のうち,内視鏡的切除が行われたものは34病変であり,手術が行われたものは22病変であった.病変形態別による描出率は隆起型病変80%で,平坦型病変65%であった.病変サイズ別の精度は10mm以上の病変(n=46)で感度96%,陽性適中率98%であり,6mm以上の病変(n=77)で感度83%,陽性適中率79%であった.CTCは便潜血陽性者において良好な精度を示し,大腸がんスクリーニング法としての可能性がある.The purpose of this study was to estimate the sensitivity and specificity of CT colonography (CTC) for colorectal cancer screeing following positive fecal occult blood test (FOBT) in Japan. To compare detection rates of colorectal cancer and adenoma between CTC and optical total colonoscopy (TCS). This study included 183 patients with positive result of FOBT in Japanese colorectal cancer screening program. The patients had both CTC and TCS on the same day. 96 patients (53%) had colorectal lesions, on the other hand 87 patients had no lesions. The total number of lesions was 191, including 77 lesions 6 mm in maximum diameter and larger, including 46 lesions 10 mm and larger

1-6 PALSARデータを用いた微小地殻変動検出 (セッション1: 地震・火山)

平成24年度京都大学防災研究所一般研究集会(24K-05)「SAR研究の新時代に向けて」, 京都大学防災研究所連携研究棟大セミナー室, 2012/9/12-1

Magma transfer at Piton de la Fournaise volcano from 3D modelling of radar interferometric data for 1998-2000

After five and a half years of quiescence, Piton de la Fournaise volcano (Réunion Island, Indian Ocean) entered into a new active period in March 1998. Synthetic aperture radar interferometry (InSAR) data show complex displacements associated with the first five eruptions that occurred between 1998 and 2000. A method was developed to find realistic geometries and overpressures of dike intrusions from the InSAR data. This method is based on a combination of a fully 3D boundary element method and a Monte Carlo inversion. The noise characteristics of the data are taken into account in the inversions. Synthetic tests show that a model is successfully retrieved within predicted narrow confidence intervals. Neglecting topography was shown to result in poor modelling at depth and in overestimation of overpressure or opening. Application of the method to each eruption requires specific parameterizations of the model(s); in some cases, a curved dike surface must be introduced, and in other cases, simultaneous inversions for two dikes are required. Most of the estimated dikes dip seaward with a typical angle of 65 degrees. The dike associated with the first eruption of the cycle (March 1998) is found to originate from sea level (2600 m below the summit), whereas those dikes associated with subsequent eruptions are estimated to be shallower than about 1000 m below the ground. Laterally elongated dikes, preeruption deformations and seismic swarms can be explained by a level of neutral buoyancy less than 1000m beneath the ground. This is consistent with the presence of magma reservoirs at this level. For the studied period, the intruded volume amounts to 8% of the lava flow volume. The spatial periodicity of dike intrusions from the northern to the southern flank is consistent with stress transfer models. Finally, Coulomb stress analysis shows that the five eruptions modelled mostly encourage slip on potential subhorizontal planes located 1000–1500m above sea level.Après cinq ans et demi de sommeil, le volcan du Piton de la Fournaise (île de la Réunion, Océan Indien) est entré dans un nouveau cycle d'activité en mars 1998. Des données d'interférométrie radar (InSAR) montrent que des déplacements complexes sont associés aux cinq premières éruptions du cycle survenues entre 1998 et 2000. Une méthode a été développée pour déterminer des géométries réalistes et les surpressions des intrusions de dykes à partir de données InSAR. Cette méthode est basée sur la combinaison d'une méthode d'éléments frontières 3D et d'une inversion de type Monte Carlo. Les caractéristiques du bruit des données sont prises en compte dans les inversions. Des tests synthétiques montrent qu'un modèle est retrouvé avec succès dans la limite d'intervalles de confiance étroits. Il a été montré que négliger la topographie induit une erreur de modélisation en profondeur et une surestimation des surpressions ou des ouvertures. L'application de la méthode à chaque éruption requiert des paramétrisations spécifiques des modèles. Dans certains cas, un dyke incurvé en surface doit être introduit, dans d'autres, l'inversion simultanée de deux dykes est nécessaire. La plupart des dykes déterminés ont un pendage vers la mer de 65 degrés. Le dyke associé à la première éruption du cycle (mars 1998) s'enracine au niveau de la mer (2600m sous le sommet), tandis que les dykes suivants sont situés à moins de 1000m sous la surface du sol. La forme latéralement allongée des dykes, les déformations pré-éruptives et les essaims sismiques peuvent être expliqués par un niveau de flottabilité neutre situé à moins de 1000m sous la surface. Ceci est cohérent avec la présence de réservoirs magmatiques à ce niveau. La périodicité spatiale des intrusions de dykes, du flanc nord au flanc sud, est cohérente avec les modèles de transfert de contraintes. Finalement, des analyses en terme de contraintes de Coulomb montrent que les cinq éruptions modélisées ont principalement favorisé le glissement sur des plans potentiels subhorizontaux situés entre 1000 et 1500m au dessus du niveau de la mer

Comparison of tropospheric delay correction methods for InSAR analysis using a mesoscale meteorological model: a case study from Japan

Abstract A major source of error in interferometric synthetic aperture radar (InSAR), used for mapping ground deformation, is the delay caused by changes in the propagation velocity of radar microwaves in the troposphere. Correcting this tropospheric delay noise using numerical weather models is common because of their global availability. Various correction methods and tools exist; selecting the most appropriate one by considering weather models, delay models, and delay calculation algorithms is essential for specific applications. We compared the performance of two tropospheric delay correction methods applied to Advanced Land Observing Satellite-2 (ALOS-2) data acquired over Japan, where the atmospheric field is complex with significant seasonal variation. We tested: (1) a method of delay integration along the slant radar line-of-sight (LOS) path using the mesoscale model (MSM) provided by the Japan Meteorological Agency and (2) the Generic Atmospheric Correction Online Service (GACOS) for InSAR, which estimates delay using the high-resolution forecast (HRES)-European Centre for Medium-Range Weather Forecasts (ECMWF) products along with an iterative decomposition approach. The results showed that the tropospheric delay correction using the slant-delay integration approach with MSM, which has a finer temporal and spatial resolution, performed slightly better than GACOS. We further found that the differences in the refractivity models would have limited significance, suggesting that the difference in performance mainly originates from differences in the numerical weather models being used. This study highlights the importance of using the best-available numerical weather model data for tropospheric delay calculations. Graphical Abstrac