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Synthesis of malachite@clay nanocomposite for rapid scavenging of cationic and anionic dyes from synthetic wastewater

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Journal of Environmental Sciences 2017年第1期29卷 97-110页

作者： Varsha Srivastava mika Sillanpää Laboratory of Green Chemistry School of Engineering ScienceLappeenranta University of TechnologySammonkatu 12FI 50130MikkeliFinland

Synthesis of malachite@clay nanocomposite was successfully carried out for the removal of cationic（Methylene Blue,MB） and anionic dyes（Congo Red,CR） from synthetic *** was characterized by TEM,SEM,FT-IR,EDS analysis and zeta *** analysis indicated that the particle diameter of nanocomposite was in the range of 14 to23 *** important parameters *** time,concentration of dyes,nanocomposite dosage,temperature and solution pH were optimized to achieve maximum adsorption *** the case of MB,removal decreased from 99.82%to 93.67%while for CR,removal decreased from 88.55%to 75.69%on increasing dye concentration from 100 to 450 mg/*** study confirmed the higher removal of CR in acidic range while MB removal was higher in alkaline *** study revealed the applicability of pseudo-second-order model for the adsorption of both *** values of AG0 for both systems suggested the feasibility of dye removal and support for spontaneous adsorption of CR and MB on *** showed 277.77 and 238.09 mg/g Langmuir adsorption capacity for MB and CR *** of dyes from the dye loaded nanocomposite was easily carried out with *** results indicate that the prepared malachite@clay nanocomposite is an efficient adsorbent with high adsorption capacity for the aforementioned dyes.

关键词： Adsorption Bentonite Dyes Kinetic study Methylene blue Congo red

Response of plasma turbulence against externally-controlled perturbations

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Chinese Physics B 2012年第9期21卷 385-395页

作者： S. I. itoh K. itoh Research Institute for Applied Mechanics Kyushu University itoh Research Center for Plasma Turbulence Kyushu University National Institute for Fusion Science

A theory of the dynamic response of the turbulent plasma against the externally-controlled perturbations is reported. Based on Mori＇s method [Prog. Theor. Phys. 33 423 （1965）], the nonlinear force is assmned to be separated into the memory function and the nonlinear fluctuating force. The former corresponds to the damping term, and the latter is categorized into the noise term. The response of the turbulent plasma against the externally-controlled source is formulated. The response kernel, which connects the externally-controlled source and the response of the turbulent field, is shown to have both the nonlocal property （in space） and the non-Markovian response （in time）. A discussion is made on the nonlocal and non-Markovian response, including the case of disparate-scale interactions. A new method is proposed to observe experimentally the nonlocal interaction in the drift wave turbulence via the zonal flows.

关键词： turbulent transport nonlocal and non-Markovian response

Measurements of the Ca II infrared triplet lines of young stellar objects

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Research in Astronomy and Astrophysics 2013年第10期13卷 1189-1201页

作者： Yoichi itoh Keiko Moto'oka Yoichi itoh The Saga Prefecture Space & Science Museum 16351 Nagashima Takeo Takeo Saga 843-0021 Japan Nishi-Harima Astronomical Observatory Center for Astronomy University of Hyogo 407-2 Nishigaichi Sayo Hyogo 679-5313 Japan yitoh @nhao.jp

Equivalent widths and line widths of Ca II infrared triplet emission lines were measured in the high-resolution optical spectra of 39 young stellar *** found that the equivalent widths of the emission lines decrease with stellar *** has often been claimed that strong chromospheric activity is generated by a dynamo process caused by fast rotation of the ***,we found no clear correlation between the strength of the Ca II lines and the stellar rotation ***,we found that the objects with high mass accretion rates had stronger Ca II emission *** correlation supports the turbulent chromosphere model or the magnetic accretion theory for classical T Tauri *** also noticed that the equivalent widths of Ca II lines in transitional disk objects are one-tenth of those in classical T Tauri stars,even if the masses of the circumstellar disks are comparable.

关键词： stars:pre-main sequence stars:emission lines

On the Function of Wall Sculpturing in Xylem Conduits

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Journal of Bionic Engineering 2009年第4期6卷 324-329页

作者： mika M.Kohonen se Helland Department of Physical Sciences University of HullCottingham RoadHU6 7RX UK

The water-conducting network of capillaries in vascular plants has evolved over hundreds of millions of years in order to be able to cope with bubble clogging,a problem which also affects modern microfluidic *** of anatomical studies have revealed that plants growing in habitats in which the formation of bubbles,or emboli,is likely to be a frequent occurrence often have various forms of geometrical sculpturing on the internal surfaces of the xylem *** possible function of such wall sculpturing has long been the subject of *** have investigated the hypothesis that wall sculpturing is a functional adaptation designed to increase the wettability of the walls of xylem conduits,an effect which could be described as the inverse of the well-known *** results show that wall sculpturing does enhance ***,theoretical calculations reveal that the geometric parameters of various types of wall sculpturing are such that the resulting surfaces are sufficiently rough to enhance wettability,but not significantly *** results provide an appealing answer to the long-standing debate on the function of wall sculpturing in xylem conduits,and may provide biomimetic clues for new approaches to the removal of bubbles in microfluidic channels.

关键词： xylem wettability capillary wall sculpturing bubble emboli microfluidic

Personal Information Self-Management:A Survey of Technologies Supporting Administrative Services

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Journal of Computer Science & Technology 2021年第3期36卷 664-692页

作者： Paul Marillonnet Maryline Laurent mikaël Ates Entr'ouvert Paris 75014France SAMOVAR Télécom SudParisInstitut Polytechnique de ParisEvry 91000France

This paper presents a survey of technologies for personal data self-management interfacing with administrative and territorial public service *** classifies a selection of scientific technologies into four categories of solutions:Personal Data Store(PDS),Identity Manager(IdM),Anonymous Certificate System and Access Control Delegation *** category,along with its technological approach,is analyzed thanks to 18 identified functional criteria that encompass architectural and communication aspects,as well as user data lifecycle *** originality of the survey is ***,as far as we know,there is no such thorough survey covering such a panel of a dozen of existing ***,it is the first survey addressing Personally Identifiable Information(PII)management for both administrative and private service ***,this paper achieves a functional comparison of solutions of very different technical *** outcome of this paper is the clear identification of functional gaps of each *** a result,this paper establishes the research directions to follow in order to fill these functional gaps.

关键词： personal information management privacy enforcement user-centric solution technological survey

Heavy Ion Beam Probe Measurement in Turbulence Diagnostic Simulator

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Plasma Science and Technology 2011年第3期13卷 326-331页

作者： Naohiro KASUYA Seiya NISHIMURA Masatoshi YAGI Kimitaka itoh Sanae-I itoh National Institute for Fusion Science 322-60roshi-cho Toki Gifu 509-5292 Japan Research Institute for Applied Mechanics Kyushu University 6-1 Kasuga-kouen KasugaFukuoka 816-8580 Japan Japan Atomic Energy Agency 801-1 Mukoyama Naka Ibaraki 311-0193 Japan

A numerical measurement module simulating a heavy ion beam probe was developed, and numerical measurements of electrostatic potential and density fluctuations are carried out for 3-D turbulent data generated by a global simulation of drift-interchange mode turbulence in helical plasmas. The deviation between measured and local values is estimated. It is found that the characteristic structures can be detected in spite of the screening effect due to the finite spatial resolution.

关键词： turbulence structural formation numerical simulation heavy ion beamprobe fluctuation spatial resolution

Fatigue Property of Additively Manufactured Ti-6Al-4V under Nonproportional Multiaxial Loading

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Chinese Journal of Mechanical Engineering 2021年第6期34卷 76-84页

作者： Yuya Kimura Fumio Ogawa Takamoto itoh Graduate School of Science&Engineering Ritsumeikan UniversityShiga 5258577Japan Fracture and Reliability Research Institute Graduate School of Tohoku UniversityMiyagi 9808579Japan Department of Mechani-cal Engineering Ritsumeikan UniversityShiga 5258577Japan

The low cycle fatigue strength properties of the additively manufactured Ti-6Al-4V alloy are experimentally investi-gated under proportional and nonproportional multiaxial *** fatigue tests were conducted using hollow cylinder specimens with and without heat treatments,at room temperature in *** fatigue tests were conducted:one for proportional loading and one for nonproportional *** proportional loading was represented by a push-pull strain path(PP)and the nonproportional loading by a circle strain path(Cl).The failure lives of the additively manufactured specimens were clearly reduced drastically by internal voids and ***,the sizes of the defects were measured,and the defects were found not to cause a reduction in fatigue strength above a critical *** fracture surface was observed using scanning electron microscopy to investigate the fracture mechanisms of the additively manufactured specimens under the two types of strain *** fracture patterns were recognized for each strain paths;however,both showed retention of the crack propagation,despite the presence of numerous defects,probably because of the interaction of the *** crack propagation properties of the materials with numerous defects under nonproportional multiaxial loading were clarified to increase the reliability of the additively manufactured components.

关键词： Additive manufacturing Ti-6Al-4V Low cycle fatigue Multiaxial stress Nonproportional loading Internal defect

Microwave Behavior of α-Fe/Fe_3B/Y_2O_3 Nanocomposites in GHz Range Prepared by Melt-Spun Technique

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Journal of Rare Earths 2004年第1期22卷 13-16页

作者： Masahiro itoh Ken-ichi Machida Collaborative Research Center for Advanced Science and Technology Collaborative Research Center for Advanced Science and Technology Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 JapanOsaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan

Nanocomposites α-Fe/Fe 3B/Y 2O 3 were prepared by a melt-spun technique, and the electromagnetic wave absorption properties were measured in the 0 05～20 05 GHz range. Compared with α-Fe/Y 2O 3 composites, the resonance frequency (f r) of α-Fe/Fe 3B/Y 2O 3 shifted to a higher frequency range due to the large anisotropy field (H A) of tetragonal Fe 3B (～0 4 mA·m -1). The relative permittivity (ε r=ε r′-jε r″) was constantly low over the 0 5～10 GHz region, which indicates that the composite powders have a high resistivity (ρ=～100 Ωm). The effective electromagnetic wave absorption (RL<-20 dB) was obtained in a frequency range of 2.7～6.5 GHz on resin composites of 80% (mass fraction) α-Fe/Fe 3B/Y 2O 3 powders, with thickness of 6～3 mm respectively. A minimum reflection loss of -33 dB was observed at 4.5 GHz with an absorber thickness of 4 mm.

关键词： melt-spun nanocomposites electromagnetic wave absorption anisotropy field matching frequency

High-Resolution Spectroscopy of Winds Associated with T Tauri Stars

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Research in Astronomy and Astrophysics 2016年第2期16卷 89-96页

作者： Naoto Iguchi Yoichi itoh Graduate School of Science Kobe University1-1 Rokkodai-choNada-kuKobeHyogo 657-8501Japan Nishi-Harima Astronomical Observatory Center for AstronomyUniversity of Hyogo407-2NishigaichiSayoHyogo 679-5313Japan

We carried out optical high-resolution spectroscopy of T Tauri stars using the Subaru Telescope. Using archived data from the Keck Telescope and the Very Large Telescope, we detected forbidden lines of [S II] at 4069A, in addition to those of [O I] at 5577 A and 6300A, for 13 T Tauri stars. We consider that low-velocity components of these forbidden lines emanate from the wind associated with T Tauri stars. Using two flux ratios of the three lines, we simultaneously determined the hydrogen density and temperature of the winds. The winds ofT Tauri stars have a hydrogen density of 2.5 × 106 cm^-3 - 2.5 × 10^9 cm^-3 and a temperature of 10 800 -18 000 K. The mass loss rates by the wind are estimated to lie in the range from 2.0 × 10^-10 M⊙ yr-1 to 1.4× 10^-9 M⊙ yr-1. The mass loss rates are found to increase with increasing mass accretion rates. The ratio of the mass loss rate to the mass accretion rate is 0.001-0.1 for classical T Tauri stars and 0.1-1 for transitional disk objects.

关键词： stars pre-main sequence -- stars emission lines