bluuebunny/crossref_metadata_2025 huggingface dataset:
Lenguaje, música y texto
Authors: Escobar Martínez María Dolores
Published: November 2020

Son numerosas las especulaciones que han proliferado en torno a la naturaleza de la relación existente entre el lenguaje y la música. Entre otros interrogantes se cuestiona la posibilidad de un origen común o la influencia de cada una de estas disciplinas en el nacimiento de la otra, lo que demuestra la antigüedad inmemorial de este fascinante vínculo.
La posibilidad de explorar los diferentes niveles de interacción música-texto a lo largo de la historia, estableciendo la naturaleza interdisciplinar de las relaciones sintácticas, semánticas, mimético-retóricas, referenciales, etc. resultaba de gran interés no sólo teórico sino práctico, en la medida en que estos conocimientos pudieran contribuir al desarrollo y aplicación de un modelo didáctico basado en la interacción de lenguaje, música y texto.
Por tanto, el origen de esta investigación era establecer un marco teórico riguroso basado en el conocimiento profundo de dichas relaciones entre lenguaje y música a través de la historia, capaz de inspirar y justificar el diseño de intervenciones didácticas musicales para la educación literaria, abriendo la puerta al desarrollo de nuevas propuestas pedagógicas en la línea de la colaboración y cooperación entre disciplinas afines como lo son la música y el lenguaje.
La tragedia de Agamenón en el teatro español del siglo XX
Authors: de Paco Serrano Diana
Published: November 2020

La historia del teatro occidental muestra la profunda herencia establecida a lo largo de los siglos con la cultura clásica. El siglo XX español es un buen ejemplo de ello, como se puede comprobar a través del estudio de uno de los mitos de la tradición clásica llevado a escena por los autores atenienses. La tragedia de Agamenón desde la muerte del héroe hasta la venganza de sus descendientes, es el único mito del que conservamos obras de los tres trágicos griegos y de Séneca. El magistral tratamiento dramático de la trilogía esquilea abre paso a un amplio abanico de reelaboraciones y reinterpretaciones que llegan hasta el teatro actual en el que tanto los temas como los caracteres y las estructuras aparecen profundamente transformados y renovados. El estudio de este proceso y de las nuevas perspectivas desde las que el dramaturgo se enfrenta a este núcleo mítico centran las páginas de este libro.
NEOMA. DICCIONARIO DE NEOLOGISMOS DEL ESPAÑOL ACTUAL
Authors: Sánchez Manzanares Carmen , Azorín Fernández Dolores , Santamaría Pérez María Isabel
Published: November 2020

Este diccionario forma parte del proyecto Actualización del léxico del español en la prensa de Murcia y Alicante (NEOMA), financiado por la Fundación Séneca (Agencia de Ciencia y Tecnología de la Región de Murcia). Es un recurso electrónico en el que se recogen las nuevas voces del español usadas en la prensa de Murcia y Alicante, con la particularidad de que además de los usos neológicos del español peninsular, se presentan voces usadas en las provincias de Murcia y Alicante de forma diferencial con respecto a otras variedades del español.
Oír y ver. 61 experimentos de acústica y óptica
Authors: del Mazo Vivar Alejandro , Velasco Maíllo Santiago , García Molina Rafael
Published: November 2020

Los animales (entre los cuales se encuentra el ser humano) emplean sensores fisiológicos para obtener información de su entorno. Entre ellos podemos encontrar sensores eléctricos, magnéticos, térmicos, químicos, mecánicos y ópticos, por mencionar algunos.
Varios de estos sensores son compartidos, en mayor o menor medida, por diversos animales, aunque están más desarrollados en unos que en otros. Esto ocurre en los seres humanos, pues no son igual de eficientes los cinco sentidos (vista, oído, tacto, olfato y gusto) de que disponemos. El sentido más empleado es el de la vista, seguido del oído, seguramente porque ambos permiten la detección a distancia; mientras que el primero se basa en las señales luminosas, el segundo requiere de estímulos acústicos.
En este libro se presentan experiencias relacionadas con estos dos sentidos, cuyas fuentes de información (luz y sonido, respectivamente) comparten, con los oportunos matices, características de los fenómenos ondulatorios. Los materiales necesarios para cada experiencia son fáciles de conseguir, pues se encuentran en la mayoría de centros de enseñanza y, también, en muchos hogares.
Powkuolo ou viduité chez les Dagara
Authors: Somda Kpanyawne Kambire
Published: November 2020

Le lecteur qui parcourra ces lignes à la recherche de solution-réponses pouvant résoudre les problèmes des veuves sera déçu. Nous invitons, au contraire le lecteur à partager nos interrogations et à apporter sa contribution. (...)
Evaluación de la erosión hídrica en un medio mediterráneo semiárido
Authors: Martínez Salvador Alberto , Conesa García Carmelo
Published: November 2020

Desde hace más de un siglo la gestión de las aguas superficiales en la región mediterránea ha estado estrechamente ligada a la problemática de la erosión del suelo y la degradación ambiental y, en particular, a la lucha contra la desertificación. Un indicador particularmente relevante del grado de erosión y degradación ambiental en cuencas vertientes a embalses lo constituye el ritmo de colmatación de sus vasos receptores. En el presente libro se propone la aplicación de dos modelos de erosión y transporte de sedimentos a una cuenca kárstica semiárida mediterránea de tamaño medio. Como área piloto de estudio se ha elegido la cuenca del río Argos vertiente al embalse del Argos (510 km2) (Cuenca del Segura) por disponer ésta de datos técnicos suficientes (estudios batimétricos, aforos de sedimentos e informes sedimentológicos realizados por el CEDEX) con los que poder cotejar los resultados de dichos modelos. El trabajo se estructura en dos partes diferenciadas. En la primera se analiza de forma general la problemática de la erosión del suelo en medios mediterráneos semiáridos, en cuyo contexto se sitúa el área de estudio. En él se hace referencia a los principales procesos de erosión de estas áreas, la evaluación de las pérdidas de suelo y la sedimentación de los embalses como indicador de degradación específica a nivel de cuenca. En la segunda parte se presenta una metodología para la evaluación de la erosión hídrica en la cuenca vertiente del embalse del Argos (Cuenca del Segura), basada en la aplicación de ecuaciones empíricas y de modelos hidrológicos y de base física. Tras obtener las tasas de erosión potencial y de degradación específica de la cuenca a partir de las ecuaciones de Dendy-Bolton, Fleming y Fournier, se realiza una evaluación de los aportes de sedimentos al embalse del Argos, mediante los modelos de erosión GeoWEPP y ARcSWAT, estableciendo finalmente una comparativa con los resultados obtenidos por otros autores.
Portafolio de prácticas de Obstetricia
Authors: Sánchez Ferrer Mª Luisa , Prieto Sánchez Mª Teresa , Nieto Díaz Aníbal
Published: November 2020

Las prácticas de Obstetricia no pretenden realizar una formación especializada en Obstetricia, sino asentar y aplicar los conocimientos teóricos adquiridos previamente en el curso actual. Es preciso actualizar dichos conocimientos teóricos si se pretende aprovechar la práctica. El objetivo es realizar una primera aproximación práctica de la asignatura. Se trata de dar una visión en conjunto de la actividad asistencial y sus claves para entender el manejo de las distintas consultas o áreas.
Debe ser norma aceptada por todos el respeto a la dignidad de las pacientes que atendemos, debiendo acudir a las prácticas correctamente vestidos, accediendo a las salas cuando haya finalizado la atención a la paciente que se esté tratando en ese momento, sin interrumpirla. Las dudas o preguntas sobre el manejo de las pacientes deben ser formuladas por el alumno una vez que se haya finalizado la asistencia a la paciente por parte del médico con la finalidad de no interferir en dicha asistencia.
Por otra parte, toda atención médica está preservada por un compromiso de confidencialidad, dado el carácter privado de los datos que se tratan, y que son muy importantes en la especialidad de Obstetricia. Los alumnos de Medicina deben adquirir dicho compromiso una vez iniciada la práctica. Hemos de intentar ser comprensivos acerca del hecho de la presión asistencial puede colapsar a veces a muchos compañeros implicados en la formaci´ón de Pregrado y Postgrado, intentando entre todos tener una actitud de colaboración e interés por la rotación que se va a realizar.
Las prácticas de Obstetricia están basadas en rotaciones por las distintas dependencias clínicas del Servicio de Obstetricia y Ginecología.
Cuestionario para la Evaluación de aspectos Didácticos, Técnicos y Pedagógicos de Webs Didácticas
Authors: Mirete Ruiz Ana Belén , García Sánchez Francisco Alberto , Solano Cabello Luque Francisco , Martínez Segura María José
Published: November 2020

Cuestionario para la Evaluación de aspectos Didácticos, Técnicos y Pedagógicos de Webs Didácticas.
El exilio en la España contemporánea
Authors: Vilar Ramírez Juan Bautista
Published: November 2020

Lección inaugural del Curso Académico 2006/2007 en la Universidad de Murcia, a cargo del catedrático Juan Bautista Vilar Ramírez.
¿Cómo y por qué nacio la Universidad Murciana?
Authors: Sánchez Jara Diego
Published: November 2020

El autor de este libro, Diego Sánchez Jara, maestro nacional y periodista, sobrino del poeta y periodista Pedro Jara Carrillo, disponía de todos los ingredientes y de todas las fidelidades para emprender esta obra, que ahora se reedita como preámbulo a los actos del Centenario de la Universidad de Murcia.
Antropología del cuidado. Del atomismo a la fenomenología
Authors: Hernández Garre José Manuel , de Maya Sánchez Baldomero
Published: November 2020

El cuidado es una esfera de análisis antropológico que deviene de la naturaleza deletérea del hombre, y como tal se ajusta bien al estudio del logos del anthropos. Se trata de un campo del saber, en continua ebullición, cuyas cosmovisiones paradigmáticas reflejan un holismo vivencial que intenta dar cabida a cada una de sus dimensiones constitutivas: biología, psique y cultura.
Sus bases antropológicas se sustentan, pues, en diferentes filosofías de la ciencia que intentan cubrir el sin fin de perspectivas que van desde los abordajes positivos a los hermenéuticos. Ante esta realidad el propósito del texto ha sido plasmar esta riqueza de enfoques, dibujando las diferentes filosofías, paradigmas, tendencias, modelos y teorías que, desde una propuesta teórica fragmentada, pero con visos de globalidad, pretende dar explicación científica al acto de cuidar.
En definitiva, se ha intentado profundizar en las bases antropológicas que sustentan los diferentes enfoques, en aras de comprender las realidades constitutivas del ser a través de una de sus esferas consustanciales, la necesidad de cuidar y ser cuidado.
El impacto de la tecnología digital en el sector publicitario
Authors: Martínez Inmaculada J. , Aguado Juan Miguel
Published: November 2020

En la publicidad -si cabe en mayor medida que en otros ámbitos- el cambio derivado del Internet ubicuo y el Big data supone desafíos organizacionales y estratégicos sin precedentes. En este informe se expone una radiografía privilegiada del sector de la publicidad elaborada a partir de una serie de entrevistas en profundidad con los CEOs y responsables de digital de empresas destacadas de cada uno de los tipos de actores del ecosistema, considerando cómo éstas perciben los desafíos derivados del cambio, cómo afecta a nivel interno en su organización, en las rutinas de trabajo, procesos de producción y sus posibilidades estratégicas.
Las mediaciones laborales: Materiales para su estudio lingüístico
Authors: Ridao Rodrigo Susana
Published: November 2020

Esta obra puede ser entendida como un complemento al libro titulado Las estrategias de (des)cortesía en las mediaciones laborales, también editado por el Servicio de Publicaciones de la Universidad de Murcia en 2009. Si en la citada investigación ofrecíamos un estudio de este género discursivo mediante una fundamentación teórica y un acercamiento práctico a las estrategias de (des)cortesía, en general, y las interrupciones, en particular, en "Las mediaciones laborales. Materiales para su estudio lingüístico" nos hemos propuesto dar a conocer transcripciones obtenidas en sesiones de mediaciones laborales, grabaciones cuya obtención puede resultar bastante difícil por la privacidad de los temas tratados.
La Disciplina Escolar: Guía docente
Authors: García Correa Antonio
Published: November 2020

Guía docente de La Disciplina Escolar, asignatura que forma parte de la titulación de Maestro, en la Facultad de Educación de la Universidad de Murcia.
Las Ranas
Authors: García López José
Published: November 2020

Abordar un comentario de Ranas de Aristófanes en estos momentos parece que necesita una explicación, cuando no es precisamente esta obra aristofánica la que carece de éste u otros estudios parecidos. Sin embargo, esta magnífica obra, cuya forma y contenido ofrece un atractivo especial dentro de la producción cómica griega, no ha recibido en nuestro país, como tantas otras, la atención debida en el aspecto que ahora presentamos; por ello, creemos, no es difícil justificar entre nosotros este tipo de trabajos. Pero, además, la elección, por nuestra parte, de esta obra, durante varios años, para acercar a nuestros alumnos de la Especialidad de Filología Clásica de la Universidad de Murcia al rico panorama del teatro griego, debemos decir que sería la razón última que nos animó a emprender esta arriesgada empresa, que esperamos pueda también animar a otros colegas a realizar otros intentos sobre esta u otra obra en el ámbito de nuestros estudios.
Proyección internacional de la ciencia ilustrada española
Authors: Valera Candel Manuel
Published: November 2020

En la presente obra se ofrece un inventario de la producción científica española publicada en el extranjero entre 1751 y 1830. La repercusión internacional de la ciencia española proporciona sustanciales elementos para evaluar la incidencia real que alcanzó la ciencia en España durante la época ilustrada y el primer tercio del siglo XIX.
Literatura posnacional
Authors: Castany Prado Bernat
Published: November 2020

La intensificación de las interrelaciones entre las diversas partes del mundo, conocida como globalización, ha generado un cierto desgaste del estado nación, que hasta entonces fue la principal unidad política, social, cultural e identitaria. La literatura parece haberse adelantado a las ciencias sociales en la búsqueda de descripciones y construcciones identitariaa más respetuosas con la irreductible complejidad del mundo y de las personas que lo habitan. Las obras de Salma Rushdie, Claudio Magris, Amin Maalouf, amos Oz, Orhan Pamuk, Milán Kundera, W.G. Sebald, Haruki Murakami, Mario Vargas Llosa, Jorge Luis Borges o Paul Smaïl, entre muchos otros, generan en la mente de sus lectores una comunidad imaginada mundial en la cual ni la representación estética ni la responsabilidad moral y política se detiene en las fronteras nacionales.
La lengua coloquial de la comedia aristofánica
Authors: López Eire Antonio
Published: November 2020

Las páginas que siguen contienen unas cuantas ideas, que suponemos claras, sobre los rasgos coloquiales que se aprecian en el ático de la Comedia aristofánica.
No ha sido nuestro propósito reconstniir un nivel de lengua (el del ático de finales del siglo V y comienzos del IV a. J. C., período cronológico de la producción literaria de Aristófanes), que s610 conocemos por estar integrado, como lo está, en la literatura y por ello sometido a las más o menos estrictas leyes del genero literario al que sirve -entre otras, a las rigurosas del metro-, ni especular en exceso sobre fonemas, sílabas, palabras y frases que extraemos de una lengua escrita y literaria que ha llegado hasta nosotros tras siglos y siglos de transmisión y de la que no nos ha sido dado obtener -asílo dispusieron los Hados- material sonoro alguno. No pretendemos recuperar lo irrecuperable.
Pero es evidente que en virtud de las leyes que gobernaban el gknero de la Comedia griega antigua en su variedad de "comedia política", uno de los registros que manejaba el poeta entregado a la actividad literaria de componer esas maravillosas piezas dramáticas, digna y aun espléndidamente representadas por las once comedias de Aristófanes conservadas, era justamente el del habla coloquial.
STUDY OF THE SURFACE PHONON MODES INSnO2 NANOMETER PARTICLES BY THE METHOD OF INFRARED SPECTROSCOPY
Authors: YU BAD-LONG  , ZHANG GUI-LAN  , TANG GUO-QING  , WU XIAO-CHUN  , CHEN WEN-JU  ,   南开大学现代光学研究所,天津300071
Published: November 2020

The properties of the surface phonon modes in spherical SnO2 nanometer particles were studied by the method of infrared spectroscopy. The sum total of Frohlich modes of SnO2 nanometer particles were reported in our experiments. The theoretical results of surface mode frequency of SnO2 nanometer particles were presented, which agreed well with those of experiments. Finally, the effects of quantum confinement on the infrared properties of SnO2 nanometer particles were discussed.
THE FIRST-PRINCIPLE STUDY ON THE STRUCTURES AND MAGNETIC PROPERTIES OF Fe-B CLUSTERS
Authors: SUN QIANG  , GONG XIN-GAO  , ZHENG QING-QI  , WANG GUANG-HOU  ,   (1)南京大学物理系,南京210093; (2)西南师范大学物理系,重庆630715; (3)中国科学院固体物理研究所,合肥230031
Published: November 2020

In this paper, by using a linear combination of atomic orbitals approach with the density func-tional formalism, the stuctures and the magnetic properties of FenB clusters (n=1-6) have been studied in detail. It is found that the B atom is favored to locate at the surface not the center of the cluster, and the tetrahedron for Fe4B and the triangular prism for Fe6B clusters are not the most stable structures. When one atom in Fen+1 cluster is replaced by a B atom forming FenB cluster, the binding energy increases, while the moment of Fe atom decreases. The variation of average moment with the atomic percentage of B atom is nonlinear in FenB cluster, differing from the behavior of bulk amorphous Fe-B alloys. It is indicated that the environmemt and doping play an important role on the stability and magnetic properties of cluster.
ON THE CONTINUOUS TRANSITION FROM PTC EFFECT TO GBBL CAPACITOR FOR BaTiO3 SEMICONDUCTING CERAMICS——APPLICATION OF THE GRAIN BOUNDARY BARRIER MODEL
Authors: ZHENG YONG-MEI  , CHEN YU  , MIAO RONG-ZHI  ,   宁波大学物理系
Published: November 2020

The quantitative analyses for our proposed potential-barrier model are given in this paper. The results quantitatively explain how the semiconductiong BaTiO3 ceramics transforms from PTC effect to GBBL capacitor. The designs of PTC resistors and GBBL capacitors from this model are made, and the design properties are much better than that of present experimental data. The mathods improving the properties of relevant devices are discussed. The model provides a theoretical basis for the design, manufacture and property improvement of semiconducting BaTiO3 ceramic devices.
THE VARIATIONAL SOLUTION TO SUPERCONDUCTIVE BOUNDARY VALUE PROBLEMS BASED ON THE NEGATIVE DIELECTRIC VERSION
Authors: ZHOU SHI-PING  , XU KE-XI  ,   上海科技大学物理系
Published: November 2020

An analytical method is presented for investigating the resonant behaviors of composed resonator formed by deporviting the c caxis oriented ＹＢａ2Ｃｕ3Ｏ７－δ (δ≈≈0) thin film on ＬａＡｌＯ3（００１）. The concept of the negative dielectric medium for a superconductor is introduced within the framework of the two-fluid model, which permits us to treat a superconductor as any other penetrable materials so as only its electromagnetic property is concerned. A conformal transformation is further suggested to map the original open boundary value problem to a closed one. This not only makes the original problem readily solved by using the variational technique, but also is powerful for the analyzing a kind of problems such as the propagation characteristics of the superconducting microstripe and coplannar waveguiding structures.
EFFECT OF HYDROGEN ON IRRADIATION INDUCED SEGREGATION IN Fe-10% Cr FERRITIC STEEL
Authors: WAN FA-RONG  , CHU WU-YANG  , XIAO JI-MEI  , TAKAHASHI HEISHICHIRO  ,   (1)北京科技大学材料物理系,北京100083; (2)日本北海道大学工学部,日本060
Published: November 2020

A new kind of coherent segregation would form in the Fe-10% Cr which was proton-implanted at R.T. and was irradiated with electrons at 623 - 723 K. Streak diffraction patterns can be observed at the same time. Such segregations were formed along the directions of ,having a length of about 100 nm and a diameter of about 1-2 atom size. Hydrogen and pure point defects produced by electron irradiation were considered to be the cause of the formation of segregation.
APLLICATION OF GENETIC ALGORITHM TO LASER BEAM RESHAPING
Authors: ZHANG JING-JUAN  , JI YANG  , YAO DE-CHENG  , CHEN JUN-BEN  ,   (1)中国科学技术大学研究生院,北京100039; (2)中国科学院等离子体物理研究所,合肥230031
Published: November 2020

Genetic algorithm is used to design a binary optical system with 8 grey levels to implement the wavefront transformation from gaussian beam to circularly flat - top beam. The comparison with the staionary phase method and the input - output method shows that genetic algorithm is more appropriate to design binary optics for profile reshaping than the other two methods.
ROLE OF GRAIN BOUNDARIES IN POLYCRYSTALLINE ZIRCONIA-BASED SOLID ELECTROLYTES
Authors: GUO XIN  , YUAN RUN-ZHANG  , SUN YAO-QING  , CUI KUN  ,   (1)华中理工大学材料科学与工程系,武汉430074; (2)武汉工业大学材料复合新技术国家重点实验室,武汉430070
Published: November 2020

On the basis of experiments, the ZrO2 grain boundaries are classified into three types: the " clean" grain boundaries, the grain boundaries with amorphous phases and the grain boundaries with crystal phases. The structure and property of the three types of grain boundaries are analyzed on .the grounds of microstructure and lattice defects. The conductivity of the crystal grain boundary phases is calculated with the effective-medium theory and found to be three times higher than that of the matrix, and an idea of further enhancing the ionic conductivity of ZrO2 by modifying grain boundaries is thus proposed. The effect of the ZrO2 grain boundaries on the emf of the oxygen sensor is discussed with simplified models.
CONDITIONS FOR THE EXISTENCE OF NON-ZERO GEOMETRIC PHASE AND ITS FORMULA
Authors: LI CHUN-FANG  , GUO GUANG-CAN  ,   中国科学技术大学物理系,合肥230026
Published: November 2020

First we put forward an essential condition, for the existence of the non-zero adiabatic geometric phase of a quantum-mechanical Hamiltonian system, that the Hamiltonian operators at different times do not commute. Then it is shown that constraint =0 determines completely the phase relation of normalized eigenstate vectors │n' (t)> at different times. According to this property, we advance the sufficient and necessary condition for the existence of the non-zero adiabatic geometric phase, which is |n′(T)>≠|n′(0)> when =0. And also we derive a general time-integral formula for the adiabatic geometric phase along the line. Finally, as an application of it, we calculate the geometric phase of a spin 1/2 system once discussed by Solem and Biedenharn. It is pointed out that the problem encountered by them lies in the multi-valuedness of the eigenstate vector in parameter space.
A MATRIX METHOD DESMEARING THE DISTORTION CAUSED BY SLIT COLLIMATOR SYSTEM IN SMALL ANGLE SCATTERING
Authors: HE JIAN  , YANG TONG-HUA  ,   中国原子能科学研究院热中子散射实验室,北京102413
Published: November 2020

A new matrix desmearing method in small angle scattering (SAS) has been developed. The feasibilities make it may be applied conveniently to all types of SAS spectrometer which have to use slit collimatior system at the research reactor with low and medium flux. The experimental results show that the method is consistent with the ordinary desmearing method.
M?SSBAUER STUDY OF THE MECHANICAL ALLOYING Fe-B ALLOY
Authors: BAI KUI-CHANG  , SU LEI  , CHENG LI-ZHI  , FENG WEI  , HE KAI-YUAN  ,   东北大学,沈阳110006
Published: November 2020

Using M?ssbauer spectroscopy, We have studied the structural characteristics of the alloy phases of three samples formed by the process of mechanical alloying. The starting compositions of these samples are 70B30,Fe55B45 and Fe30B70. The crystallization or transition of the amorphous phases under annealing has also been examined. It was found that a certain relation exist between the amorphous phases and corresponding Fe-B compounds.
OPTICAL SPECTRA OF DI-CARBON CENTER AFTER ANNEALING IN SILICON MONOCRYSTAL
Authors: GUO DA-QIN  , QI WEN-JIE  ,   (1)复旦大学电子工程系,上海200433; (2)复旦大学应用表面物理国家重点实验室,上海200433;香港科技大学物理系,香港九龙清水湾道
Published: November 2020

We've investigated the annealing behaviour of the di-carbon centre (zero-phonon line at 969 meV or 7818 cm-1)in float zone and Czochralski silicon crystals. The break-up process is not the only way to destroy the di-carbon centres and it is shown that the presence of other defects may affect the annealing process. After the thermal destruction of the di-carbon centre, we've discovered many previously unreported carbon and oxygen related point defects. Their photolumiescence lines are observed. We suggest that the interstitial silicon atom is the defect trapped near but not ‘at' the di-carbon centre forming the satellite sublines at 951.16(7671), 952.98(7686), and 956.91meV (7717cm-1).
SRPES AND PL FURTHER STUDIES OF CHEMICAL-PASSIVATED GaAs SURFACE BY-CH3CSNH2 TREATMENT
Authors: LU ER-DONG  , ZHANG FA-PEI  , YU XIAO-JIANG  , XU SHI-HONG  , XU FA-QIANG  , PAN HAI-BIN  , HAN ZHENG-FU  , XU PENG-SHOU  , ZHANG XIN-YI  ,   中国科学技术大学国家同步辐射实验室
Published: November 2020

In this paper, CH3CSNH2 passivated GaAs(100) surfaces in different conditions such as in alkali and acid solution were investigated by SRPES and PL. SRPES reveals that sulfur bonds both Ga and As on GaAs surfaces. Improvements of PL intensities reveal the reduction of surface combination velocity, resulting in the reduction of surface defect states due to the formation of sulfur passivation films.
THEORETICAL CALCULATIONS OF CROSS SECTIONS FOR ELECTRON CAPTURE IN COLLISIONS OF PROTON WITH- He+ AND Li++ IONS AT HIGH ENERGIES
Authors: ZHOU XIAO-XIN  , ZHANG XIAN-ZHOU  , CHEN HONG-SHAN  , DONG CHEN-ZHONG  ,   (1)河南师范大学物理系; (2)西北师范大学物理系
Published: November 2020

We have computed the partial cross section ratios of electron capture into excited states to ground state in collisions of proton with He+ and Li++ ions using Oppenheimer Brinkman Kramers and continuum distorted wave methods. Our results show that the cross section ratios obtained by the two different methods are consistent with each other at high energies. Consequently, we propose a simple method to estimate the partial and total cross sections of electron capture by proton from any hydrogen like ions at high energies.
PHASE DIAGRAM CALCULATION OF DIAMONDGROWTH FROM LOW PRESSURE GASES
Authors: ZHANG WEI  , WANG JI-TAO  , WAN YONG-ZHONG  ,   复旦大学电子工程系
Published: November 2020

The phase diagrams of diamond growth from CH4/H2, CO/H2 gases and oxyacetylene flames are calculated by non-equilibrium thermodynamic coupling model in the paper. These phase diagrams are different from those derived from classical equilibrium thermodynamic theory. A diamond growth region, which is the thermodynamic basis of diamond synthesis, exists in each calculated phase diagram. The diamond growth region reflects the roles of those activated particles such as super equilibrium atomic hydrogen during diamond deposition. The calculated phase diagrams are agreement with many reported experimental results, and they will be of favor of theoretical and experimental studies of diamond growth from gas mixtures.
STRANGE REPELLER INDUCED BY DYNAMICAL DISCONTINUITY
Authors: QU SHI-XIAN  , HE DA-REN  ,   (1)西安石油学院基础课部; (2)扬州大学师范学院物理系
Published: November 2020

Employing a kind of piece-wise linear map with a hole,we show that “hole-induced crisis” is a result of the emergence of a “strange repeller due to discontinuity”. The strange repeller forces the iteration orbit to escape from the original chaotic attractor.Thus the attactor suddenly expands.We have proved that the lifetime of iterations in original attractor is inversely proportional to the escaping ratio,which enables us to obtain the dependence of the mean lifetime on the control parameter analytically.
PHOTOLUMINESCENCE CHARACTERISTICS AND GROWTH-OF TEXTURED C60 FILMS
Authors: CHEN GUANG-HUA  , ZHANG YANG  , YAN HUI  ,   北京工业大学应用物理系
Published: November 2020

The (111) textured C60 films have been fabricated on the fluorophlogopite crystal by hot wall method. X-ray diffraction patterns and Raman spectrum of C60 films indicate that the C60 film is in fcc structure,and tends to have a (111) texture. The surface structure and the crystal morphology of C60 films are measured by scanning electron microscopy and atomic force microscopy. At 77K and 300K,photoluminescence spectra of the textured C60 films are measured. And radiative mechanisms are discussed.
INVESTIGATION OF THE AlOx-Al TUNNELING-BARRIER IN JOSEPHSON JUNCTIONS
Authors: LIU BI-RONG  , H.MANTLE  ,   (1)安徽大学物理系; (2)瑞士邮电科学院
Published: November 2020

We have studied the AlOx-Al tunneling barrier in Josephson junctions by measuring XPS, AVS and Fiske step voltage.From these measurements we have found that the minimal optimum deposition Al layer thickness is 7nm in the tunneling barrier of junction that the thickness of the AlOx formed on Al only depends on oxidation condition and that the Al oxide in the tunneling barrier structure can contain an OH radical as AlOOH state.Also we evaluated the remnant Al thickness,and confirmed that the proximity effect generated by normal Al between the AlOx and low Nb exists.
A STUDY OF OPTICAL OSCILLATOR STRENGTHS-FOR VALANCE SHELL OF MOLECULAR OXYGEN
Authors: ZHU LIN-FAN  , ZHONG ZHI-PING  , JI QING  , ZHANG XIAO-JUN  , WU SHU-LAN  , FENG REN-FEI  , XU KE-ZUN  ,   中国科学技术大学近代物理系
Published: November 2020

The absolute optical oscillator strength density spectrum of oxygen has been measured at an impact energy of 1.5 keV and a mean scattering angle of 0° in an energy region of 5.7—28.5 eV with typical FWHM 60 meV.The absolute optical oscillator strengths corresponding to vibrational levels of E3Σ-ｕ,ν′=0,1,2 and 23Πｕ,ν′=0,1 are reported and compared with previous experimental and theoretical results.The validity and accuracy of the Bethe-Born conversion factor is confirmed down to 6 eV by comparison.
SURFACE MORPHOLOGY AND CRYSTALLIZATION BEHAVIOR-OF AMORPHOUS NiNi88P12 ALLOY FILM
Authors: YANG JIAN-SHU  , CAI QUN  , DONG SHU-ZHONG  , LI HE-XING  , DENG JING-FA  , SUN JIE-LIN  , LI MIN-QIAN  ,   (1)复旦大学化学系,上海200433; (2)复旦大学应用表面物理国家重点实验室,上海200433; (3)中国科学院上海原子核研究所核分析开放研究实验室
Published: November 2020

The amorphous Ni88P12 alloy films were prepared on the p-Si(100) substrate by chemical deposition in solution at 363K. The structure, composition and morphology of the films were studied by STM, AFM, XRD and XPS before and after the treatment of oxidation, reduction and crystallization. The results showed that the amorphous Ni88P12 alloy film was in the form of the micrometre-scale grains and each of which consisted of nanoparticles. The surface crystallization started as the films were oxidized and reduced at the temperature lower than that at which crystallization occurred. The morphological feature of the crystallites developed from the nanophase of the amorphous film was also observed after crystallization.
WHY THE ORBITAL ANGULAR MOMENTUM CANNOT BE-?/2?
Authors: BAO JIAN-REN  , ZHOU LU-WEI  ,   复旦大学物理系
Published: November 2020

The association and difference between general angular momentum and orbital angular momentum are discussed. Their association lies in the identity of local property (Lie algebra) between group SU (2) and SO (3) (isomorphism), while their difference is their distinctive integral property. The minimal unit ?/2 of the general angular momentum is determined by the local properties of the groups, namely the commutation relation of Lie algebra (or commutor of angular momentum). However, the minimal unit ? of orbital angular momentum depends upon the integral property of group SO (3).
NONLINEAR EVOLUTION AND LOCAL STRUCTURE FORMATION OF ELECTROSTATIC WAVES IN MAGNETIC PLASMAS
Authors: YANG WEI-HONG  , CHEN YIN-HUA  , LIU JI-XING  ,   (1)中国科学技术大学近代物理系; (2)中国科学院理论物理研究所
Published: November 2020

In this paper,the nonlinear drift waves described by the Hasegawa-Mima equation have been investigated by means of analytic researches and numerical simulations.The numerical results have been shown by figures.The initial disturbances of electrostatic waves,by the nonlinear mode-coupling,will evolve into a chain of vortices,these vortices gobble up each other and some large stable vortices are formed at the final stage of the nonlinear evolution.
TLS-COUPLING STATE AND ITS EFFECT ON THE LOW FREQUENCY SOUND ABSORPTION IN GLASSES
Authors: WANG GUO-LIANG  ,   苏州铁道师范学院物理系
Published: November 2020

The occurrence of transitions between two tunneling states of two-level systems(TLS) in glasses is attributed to the coupling to a phonon field. The coupling makes TLS form new “polar coupling states”, we call them as TLS-phonon coupling states. The behaviour of the excitation and de-excitation of TLS coupling states via the interaction with phonon is presented to explain the experimental characteristics of the low-frequency sound absorption in glasses at low temperatures.
InGaAs/GaAs STRAINED RIDGE QUANTUM WIRES GROWN-BY MBE ON NONPLANAR SUBSTRATE
Authors: NIU ZHI-CHUAN  , ZHOU ZENG-QI  , LIN YAO-WANG  , LI XIN-FENG  , ZHANG YI  , HU XIONG WEI  , Lü ZHEN-DONG  , YUAN ZHI-LIANG  , XU ZHONG-YING  ,   (1)中国科学院半导体研究所;国家光电子工艺中心; (2)中国科学院半导体研究所半导体超晶格国家重点实验室
Published: November 2020

The structures of the strained InGaAs/GaAs ridge quantum wires(QWRs) were proposed and the samples fabricated by MBE growth on patterned substrate. High resolution scanning electron microscope (SEM) studies showed that these ridge structures were formed with (001) top and (113) side faces.The photoluminescence(PL) measurements indicated that the lateral quantum confinement effects of the ridge-QWRs caused the quantum confined energy a 10meV blue-shift, which agreed with the approximate calculations for the strained ridge-QWR structure using Kronig-Penney model. This strainedridge-QWRs consisted of three aspects of lateral confinement effects.Firstly the thickness of ridge quantum wells on the ridge top was larger than that on the side surfaces;Secondly the indium concentrations on the ridge-top region was higher than that on the side region;Thirdly the strain effects led to a larger energy gaps in side (113) plane than that in the (001) ridge top.The above three factors were cooperated to enhance the confinement effects on the lateral motion of carriers in strained ridge QWRs.
PHENOMENOLOGICAL THEORY OF SLOW POLARIZATION IN POLYMERS
Authors: LI JING-DE  , CAO WAN-QIANG  , WANG YONG  ,   中山大学物理系
Published: November 2020

The phenomenological theory using in phase transition of crystalline state is generalized to polymers. The dielectric behaviors and space charge electret effects of polymers in the process of its structural transitions are explained by the theory. The phase transition of a crystal is the transition of its structure of first-order, it is related to the anomalous of dielectric constant εh of fast polarization. But the structural transitions of a polymer is only the transition of its structure of second-order and third-order; in this process, the anomalous of εh absents and the reciprocal of dielectric constant εl of slow polarization softens as parabolic type. The theory is in good agreement with experimental results of polypropylene.
THE SIZE EFFECT OF ELECTRONIC STATES OF QUANTUM DOTS AND THE INFLUENCES OF MAGNETIC FIELDS
Authors: XIE WEN-FANG  , CHEN CHUAN-YU  ,   广州师范学院物理系，广州  510400
Published: November 2020

Within the effective mass approximation, the energy spectra of the three-electron system in two-dimensional quantum dots subjected to different confinement potential are calculated by using the method of few-body physics. The results show that the appearance of magic angular momentum arises from the quantum mechanical symmetry, the size of confinement potential and the strength of magnetic field.
A NEW WAY OF MAKING BUCKY ONION BY THERMAL DECOMPOSITION OF SiC NANOMETER POWDERS UNDER HIGH-TEMPERATURE AND VACUUM
Authors: YANG XIU-CHUN  , ZHANG XIAO-BIN  , ZHANG ZE  , DING ZI-SHANG  , ZHOU GUO-ZHI  ,   (1)北京科技大学物理化学系，北京  100083; (2)浙江大学材料科学与工程系，杭州  310027; (3)中国科学院北京电子显微镜实验室，北京  100080
Published: November 2020

Bucky onions have been produced by decomposing SiC nanometer powders under high- temperature and vacuum. Transmission electron microscope and high resolution electron microscope observations show that when SiC particles decompose completely, they transform into quasi-spherical hollow carbon particles and onion-like particles composed of concentric graphitic shells. When SiC particles decompose incompletely, they become compound particles, which are composed of β-SiC in particles and of quasi-concentric graphitic shells on surface of particles. The results suggest that the traditional idea that planar graphite is the most stable form of pure carbon would then have to be seriously discussed.
MASS RESOLVING CHARGE-EXCHANGE NEUTRAL PARTICLE MEASUREMENT ON HT-7 TOKAMAK
Authors: LIU SHENG-XIA  ,   中国科学院等离子体物理研究所，合肥  230031
Published: November 2020

A new mass resolving neutral particle analyzer was installed on the HT-7 tokamak.The analyzer is constructed with electric and magnetic fields and is calibrated over an energy range of 0.2—50keV.The new analyzer provides a wide energy range,mass resolving,perpendicular scanning charge-exchange diagnostic.In Ohmic-heated deuterium discharges,the analyzer provides the measurement of deuterium ion temperature over a range of viewing angles,and radial ion temperature profiles can be obtained.
ENHANCED MAGNETORESISTIVE EFFECT IN TRILAYERED FILMS OF LaCaMnO/LaNdCaMnO/LaCaMnO
Authors: CHENG RONG-SHENG  , LI KE-BIN  , LI XI-JUN  , CHEN ZHI-XIANG  , XIONG CAO-SHUI  , ZHU JING-SHENG  , ZHANG YU-HENG  ,   (1)中国科学技术大学结构分析开放研究实验室，合肥  230026; (2)中国科学院固体物理研究所，合肥  230031; (3)中国科学院固体物理研究所，合肥  230031;中国科学技术大学结构分析开放研究实验室，合肥  230026
Published: November 2020

A series of La0.67Ca0.33MnO3/(La0.35Nd0.65)2/3Ca1/3MnO3/La0.67Ca0.33MnO3(termed as LCMO/LNCMO/LCMO) epitaxial trilayered films, in which LNCMO under zero magnetic field exhibits semiconductor-like conducting behavior down to 4.2K, have been fabricated on SrTiO3(001) substrates by d.c. magnetron sputtering technique. The measurements of resistance show that transport properties of the trilayered films are clearly different from that of the pure LNCMO or LCMO films. In the LCMO(75nm)/LNCMO(450nm)/LCMO(75nm)film, two resistance peaks have been observed. With the measurements of magnetic hysteresis loop, it show that there may exist a magnetic exchange-coupling interaction and an intra-magnetic field in the trilayered film. When the external magnetic field is applied, the resistance decreases and the resistance peak shifts to higher temperature, therefore it appears colossal magnetoresistance effect. Compared with the magnetoresistance response in pure LCMO film, the enhanced magnetoresistance effect have been observed in these trilayed films, and it maintains a stronger magnetoresistance effect in a wide temperature range. We suggest it results from the middle layer LNCMO in the trilayered film.
BLUE EMISSION AND INFRARED STUDY OF THE POROUS SILICON ANODIZED UNDER LASER ILLUMINATION
Authors: LI PENG  , MA YU-RONG  , FANG RONG-CHUAN  , HU KE-LIANG  ,   (1)中国科学技术大学结构分析开放研究实验室，合肥  230026; (2)中国科学技术大学物理系，合肥  230026
Published: November 2020

Some porous silicon, which were formed on n-type c-Si under illumination during the anodization,show blue photoluminescence after a long period of storage in an atmospheric environment at room temperature. Experiments of photoluminescence and infrared transmission and reflection indicate that samples, which were anodized under strong Ar+ 488 nm laser illumination, have an oxidation layer of better quality, in which there are less stress, less amorphous and a more completely cross-linked Si-O-Si network. And this kind of oxidation is favorable to the blue emission of porous silicon.
ROTATIONAL ANALYSES OF LASER INDUCED FLUORESCENCE EXCITATION SPECTRA OF THE SUPERSONIC JET-COOLED SO2( 1A2— 1A1) SYSTEM
Authors: WANG CHU-JI  , CHEN JUN  , ZHANG TAO  , ZHANG LI-MIN  , DAI JING-HUA  , CHEN CONG-XIANG  , MA XING-XIAO  ,   中国科学技术大学化学物理系，合肥  230026
Published: November 2020

The influence of the different gas ratios (SO2/Ar) on the vibronically resolved laser-induced fluorescence excitation spectra of the SO2( 1A2— 1A1) system was investigated under the supersonic jet conditions.High resolution spectra of two complete progressions (1,m,1),(0,n,1) were obtained,in which the rotational structures of the (0,9,1),(0,10,1),(1,7,1),(1,5,1)-(0,0,0) bands were observed,for the first time,so long as we know.The assignments of 847 rotationally resolved lines were based on an asymmetric top simulation,which results in the determination of the rotational and centrifugal distortion constants of each vibrational level of state.The approximate geometry parameters of state was derived to be r(S—O)=0.160nm,∠OSO=101.64°.In addition,a discussion on the inertial defect of each vibrational level of state was presented.
THE OPTICAL TRANSFER FUNCTION OF CONFOCAL SCANNING LASER MICROSCOPY WITH GAUSS SOURCE
Authors: HUANG JING  , LIANG RUI-SHENG  , SITU DA  , ZHANG KUN-MING  , TANG ZHI-LIE  ,   (1)华南理工大学应用物理系，广州  510641; (2)华南师范大学物理系，广州  510631
Published: November 2020

Taking into account the size effect of the source and the detector, we have calculated the Optical transfer function of a real system with Gaussian distribution of the source. Because of the Gaussian distribution source , the size of source and detector can be enlarged, and the signal-to-noise ratio will be increased.
MULTIPLE SOLITON SOLUTIONS FOR THE APPROXIMATE EQUATION OF LONG WATER WAVE
Authors: ZHANG JIE-FANG  ,   浙江工业大学工程科学研究中心，杭州  310032;浙江师范大学非线性物理研究室，金华  321004;浙江师范大学物理系，金华  321004
Published: November 2020

By using the homogeneous balance method,we give multiple soliton solutions of the approximate equations of long water wave.The method used herein can be generalized to the study of a class of nonlinear evolution equations.
MECHANISM OF MULTIPHOTON IONIZATION OF CH3I IN THE 440—510nm REGION
Authors: ZHANG LIAN-DI  , ZHANG BIN  , FANG LI  , WEI JIE  , GUO WEN-YUE  , ZHANG SHU-DONG  , CAI JI-YE  ,   中国科学院安徽光学精密机械研究所激光光谱学开放研究实验室，合肥  230031
Published: November 2020

The multiphoton ionization spectrum of methyl iodide is studied in the 440—510nm region.Three-photon is just resonant with the high-frequency tail of the (5pπ,6p) Rydberg state of methyl iodide.Then the excited methyl iodide continually absorbs another photon to be ionized and dissociated into fragment ions.
RESONANCE ENHANCED MULTIPHOTON INOIZATION STUDIES OF CF2Cl RADICALS BETWEEN 332nm AND 362nm
Authors: LI QUAN-XIN  , SHU JI-NIAN  , ZHANG QUN  , XU HAI-FENG  , YU SHU-QIN  , CHEN CONG-XIANG  , MA XING-XIAO  ,   中国科学技术大学化学物理系，合肥  230026
Published: November 2020

The (2+1) resonance-enhanced multiphoton ionization (REMPI) spectra of the CF2Cl radicals, which are generated by a pulsed dc discharge,were investigated between 332 and 362nm.Two new Rydberg states,4s and 4p,were observed and indentified.The observed states and spectroscopic constants include 4s Rydberg state (band origin ν0—0=55371cm-1,ω3′ (CF2 scissors)=523±7cm-1,ω′4 (OPLA,i.e.,out-of-plane bending mode)=734±4cm-1) and 4p Rydberg state (ν0—0=57601.3cm-1,ω3′=552±10cm-1,ω4′=762±12cm-1).The quantum defect values of 4s and 4p Rydberg states were also estimated.It seems that the radical production by a pulsed dc discharge combined with PEMPI technique is a powerful tool to study the electronic state of radicals.
OBSERVATION OF INTENSITY SQUEEZING AND LARGE PHASE NOISE REDUCTION IN SELF-LOCKED SEMICONDUCTOR LASERS
Authors: ZHANG TIAN-CAI  , LI TIAN-YU  , D.VAN EFFENTERRE  , XIE CHANG-DE  , PENG KUN-CHI  ,   (1)Ecole Polytechique,Palaiseau,91128,France; (2)山西大学光电研究所，太原  030006
Published: November 2020

Both intensity squeezing and dramatic phase noise reduction have been obtained with a confocal cavity used to feedback the beam from the quantum well diode laser.We have measured an intensity squeezing of 19.3%(37.8% inferred at the laser output) around 35MHz and achieved phase noise reduction of 40—25dB from 9kHz to 100MHz.Quasi-minimum uncertainty state have been demonstrated.
SPATIAL SOLITAIRE WAVE IN BIASED PHOTOVOLTAIC-PHOTOREFRACTIVE CRYSTALS
Authors: LIU JIN-SONG  , LU KE-QING  ,   西安电子科技大学技术物理系，西安  710071
Published: November 2020

Steady-state dark (bright)spatial solitons are predicted for biased photovoltaic photorefractive materials,which are due to the photovoltaic effect and spatially nonuniform screening of the external bias field. These solitons differ from previously observed steady-state photorefractive spatial solitons in their properties and physical origin.If the applied field is strong enough, these solitons are just like the screening solitons. If the applied field is absent, these solitons degenerate into the photovoltaic solitons under the close-circuit condition.
NUMERICAL SIMULATION OF THE GROWTH OF Hg1-xCdxTe CRYSTAL BY THE TELLURIUM SOLVENT METHOD
Authors: LIU JIA-LU  , ZHANG TING-QING  , LUO HONG-WEI  , YAN BEI-PING  , LANG WEI-HE  , ZHANG BAO-FENG  ,   (1)电子工业部第11研究所，北京  100015; (2)西安电子科技大学微电子研究所，西安  710071
Published: November 2020

A theoretical model is presented describing the growth of Hg1-xCdxTe crystal by the tellurium solvent method under steady growth conditions. The model uses the one-dimensional time-dependent equations of species diffusion with the moving free boundaries of the solution zone determined via consideration of the phase diagram. Numerical solutions are presented for the growth of Hg0.8Cd0.2Te (x=0.2) crystal by the finite difference method. The iufluence of the temperature profile of the solution zone, the velocity of the travelling heater, the length of the initial solution zone and the temperature of the growth interface on the crystal axial composition of HgCdTe is discussed in detail. The simulation results are in good agreement with the experiment.
PARALLEL MODEL FOR PHOTOSTIMULATED LUMINESCENCE
Authors: ZHAO HUI  , WANG YONG-SHENG  , XU ZHENG  , HOU YAN-BING  , XU XU-RONG  ,   北方交通大学光电子技术研究所，北京  100044
Published: November 2020

In this paper, we analyse two kinds of theoretical models. Based on the study of electron transfer process in photostimulated luminescence, a new model, parallel model, is proposed. In terms of this model, the general expression of photostimulated luminescence process is gained. A kind of photostimulated luminescence material, BaFCl:Eu2+, is fired and a series of spectra are measured. To test this model we compared the theoretical and experimental results in terms of decay process, as well as the difference between two kinds of color centers and the relationship between irradiation dose and luminescent intensity.
RULE FOR CONTROLLING CHAOS IN A TWO-PARAMETER LASER OSCILLATION OUTPUT SYSTEM
Authors: ZHANG XU  , LIU BING-ZHENG  ,   (1)东北师范大学分析测试中心，长春  130024; (2)东北师范大学物理系，长春  130024
Published: November 2020

We study the problem of controlling chaotic behavior of a two-parameter laser system.We give different equations for controlling chaos with different parameters and compare their effects.Numerical results show that chaotic states of laser output can be controlled to 1P,2P,…2nP,P standing for period.We find that each equation obeys a definite rule.Finally,we analyze and discuss some related problems.
STUDY OF STRUCTURAL, ELECTRICAL AND OPTICAL PROPERTIES OF VO2 THERMOCHROMIC THIN FILMS
Authors: CUI JING-ZHONG  , DA DAO-AN  , JIANG WAN-SHUN  ,   中国空间技术研究院兰州物理研究所，兰州  730000
Published: November 2020

VO2 thermochromic thin films have been deposited by using the magnetron sputtering method. Both macro, micro and electronic structures of the films have been characterized by X-ray diffraction,X-ray photoelectron spectroscopy and atomic force microscopy. The results show that the films have high purity, monophase and excellent polycrystallinity, which are coincident with the optical and electrical properties.