上海原创音乐剧《微光》亮相2019APAP 推介剧目现场

日前,在2019美国全国演艺出品人年会(APAP)推介剧目现场,中国上海原创音乐剧《微光》(原名《犹太人在上海·微光》)中的三首代表曲目《转机》《同伴》和《此刻的阳光》被唱响。这意味着,以二战期间躲避德国纳粹迫害的犹太人在上海避难为背景的这部中国原创音乐剧,在向着百老汇驻场演出的历史性突破之路上,又前进了一步。

Simultaneous diagonalization of two quaternion matrices

The simultaneous diagonalization by congruence of pairs of Hermitian quaternion matrices is discussed. The problem is reduced to a parallel one on complex matrices by using the complex adjoint matrix related to each quaternion matrix. It is proved that any two semi-positive definite Hermitian quaternion matrices can be simultaneously diagonalized by congruence.

Risks and new transformations of PPP contracts

This paper tries to demonstrate that the principle of the risk allocation based on the balance is the most effective way to resolve the risk allocation problems of public-private partnership （PPP） contracts and presents suggestions how to carry out this principle. For PPP projects, it is necessary to set up a workable and commercially viable risk sharing mechanism to satisfy the different interests and the objectives of both the public sector and the private sector. An effective risk allocation mechanism is not only an important part in preparing project documents, but also an essential part in the success of PPP contracts. Risk allocation can be represented in a risk matrix. The more balanced the risk allocation is, the lower the risk degree of PPP contracts is. Therefore, the most effective risk allocation of PPP contracts is that the public sector and the private sector take part in risk management together in all the stages of the project and allocate the balanced risks. The outcomes of this paper can be used by both the public sector and the private sector to make a good choice of the PPP contract form.

Adjoint Assimilation in Marine Ecosystem Models and an Example of Application

This paper aims at a review of the work carried out to date on the adjoint assimilation of data in marine ecosys-tem models since 1995. The structure and feature of the adjoint assimilation in marine ecosystem models are also introduced. To illustrate the application of the adjoint technique and its merits, a 4-variable ecosystem model coupled with a 3-D physical model is established for the Bohai Sea and the Yellow Sea. The chlorophyll concentration data derived from the SeaWiFS o-cean colour data are assimilated in the model with the technique. Some results are briefly presented.

Changes in Argumentation Performance:Effects of Teacher-Student Collaborative Assessment

This paper compares the effectiveness of one-semester-long instruction of teacher-student collaborative assessment(TSCA)and trained peer review assessment(TPRA).Dependent variables include occurrence of structural elements of the simplified Toulmin model,and improvement of argumentation substance which refers to the quality of reasoning reflected in Toulmin structural elements.Eighty-one sophomore English majors from TSCA group(n=41)and TPRA group(n=40)were asked to construct two argumentative essays at both the beginning and the end of the semester.The results reveal that the TSCA group produced significantly more counterargument claims and rebuttal data.Additionally,the TSCA group significantly outperformed TPRA group in constructing stronger counterargument claim,rebuttal claim and rebuttal data.

Selection, Training and Supervision of Breast Cancer Peer Educators： a literature review

Breast cancer is one of the most serious malignant and it seriously affects the quality of life and mental health of the patients. Research shows that peer education can improve breast cancer patients＇ quality of life, treatment compliance, and self-management behavior. Its selection, training and supervision are particularly important due to the core role of peer educators in peer support. This article reviewed the research status and progress in the selection, training and supervision of breast cancer peer educators abroad in order to provide references for further study.

Application of adjoint assimilation technique in simulating tides and tidal currents of the Bohai Sea, the Yellow Sea and the East China Sea

Considering the interaction of different tidal waves, an adjoint numerical model is developed to simulate M2, S2, K1 and O1 tidal waves in the Bohai Sea, the Yellow Sea and the East China Sea （B-Y-E） simultaneously. Compared with previous researches, by using the adjoint assimilation technique to inverse open boundary conditions and bottom friction coefficients based on altimetric data from TOPEX/Poseidon （T/P） and tidal gauges data, the precision of the numerical simulation is significantly improved. Selecting 14 days of simulated results after the initial wanning run to conduct harmonic analysis, the results can show the characteristics of M2, S2, K1 and O1 tidal wave systems perfectly in B-Y-E. Compared with 9 current stations, the calculated harmonic constants of tidal currents for M2 and K1 are in good agreement with the observed ones.

An Alignment-Based Approach to L2 Learning of Chinese Numeral Classifiers

This study investigated the efficiency of learning the Chinese numeral classifiers by L2 Chinese learners by means of an alignment-oriented task. Participants were a total of 96 intermediate learners of L2 Chinese, who were randomly assigned to two experimental groups and one control group, with each group consisting of 32 participants. The continuation task used in this study consisted of a picture-based Chinese text depicting a room with an array of objects, which necessitates the use of classifiers. The two experimental groups were both required to first read the text and then write to describe their own rooms in comparison with the one in the text. One group was instructed to use the classifiers from the text as much as possible in their writing, whereas the other was not required to do so. Participants in the control group were first given the picture to look at in the absence of the text and then asked to describe their own rooms. The results showed that the continuation task significantly enhanced participants’ retention of the Chinese numeral classifiers, suggesting that the alignment-based approach is an effective way to learn difficult linguistic categories such as the Chinese classifiers.

The role of intangible capital in wage inequality between skilled and unskilled workers in China

Wage inequality between skilled and unskilled workers has increased rapidly in China, right along with its major trading partner--the United States. Trade liberalization and technological improvement have been proposed as causes for the inequality, yet trade liberalization and technological improvement have set the stage for another, possibly more important, cause of the inequality： the movement of intangible capital to China. Intangible capital works synergistically with other inputs to make skilled-workers and tangible capital more valuable. Once the accumulated tangible capital reaches a certain level, its lower unit cost will attract the inflow of intangible capital, which will further expand the demand for skilled workers. As a result, wage inequality becomes larger in China. This paper takes the first step in an attempt to understand the role that the movement of intangible capital plays in the increasing wage inequality in China, and sets out several possible policy prescriptions for China to deal with this inequality.

The Role of the Outsourcing Contract From a Partnership-based Perspective

The definition of relational contents which outsourcer and outsourcee arrange and formalize inside a contract is one of the critical success factors of the outsourcing choice. The contract criticality is greater if the outsourcing aim is made of highly strategic activities, functions, or processes and if the real aim is not the cost saving but the sharing of added value resources, skills, and knowledge. That is, this paper aims to provide some conceptual insights about the role of the contract with a specific reference to the strategic outsourcing, which is the kind of outsourcing where the relationship between the outsourcer and outsourcee is set inside the ＂partnership-based＂ logic. In particular the remarks proposed concern the role of the contract as a tool to face the risk and manage the relationship.

Diagnosis of Physical and Biological Control over Phytoplankton in the Gulf of Maine-Georges Bank Region Using an Adjoint Data Assimilation Approach

The linkage between physical and biological processes, particularly the effect of the circulation field on the distribution of phytoplankton, is studied by applying a two-dimensional model and an adjoint data assimilation approach to the Gulf of Maine-Georges Bank region. The model results, comparing well with observation data, reveal seasonal and geographic variations of phytoplankton concentration and verify that the seasonal cycles of phytoplankton are controlled by both biological sources and advection processes which are functions of space and time and counterbalance each other. Although advective flux divergences have greater magnitudes on Georges Bank than in the coastal region of the western Gulf of Maine, advection control over phytoplankton concentration is more significant in the coastal region of the western Gulf of Maine. The model results also suggest that the two separated populations in the coastal regions of the western Gulf of Maine and on Georges Bank are self-sustaining.

Comparison Between Peer Mediation and Teacher Mediation in Dynamic EFL Writing Assessment:A Case Study

The present case study explores the effects of mediation of dynamic assessment （DA） on EFL writing development of English majors. Two junior English majors and their English writing teacher in a Chinese university were involved in a DA writing task. Student B was asked to write an application letter in English of around 500 words during her spare time. Student A and the teacher, as the mediators, tried to help her improve the essay based on her Zone of Proximal Development （ZPD）. The dialogues in the two mediation processes were recorded and transcribed. Analysis of the data from Student B＇s compositions and the recorded talks during the mediation process showed that there are some similarities between the two mediations including making more use of implicit prompts to guide the learner and playing a positive role to facilitate EFL language growth, especially grammar. The.analysis, however, also showed great differences. The teacher tutor attempted more prompts and more implicit strategies than the peer to show that the teacher could do a better job in exploring the learner＇s ZPD. Even so, the peer might be of important help in improving the language and content before a teacher mediation in the DA process.

ASSESSING THE IMPACT OF PEER REVISION ON ENGLISH WRITING OF TERTIARY EFL LEARNERS

通过对48名大学生英语写作中同伴作文修改的实证研究,评价同伴作文修改对他们的定稿的影响。具体研究大学生对同伴作文修改形式的认可情况(以更为熟悉的教师修改情况为参照),以及在同伴作文修改过程中,学生是如何针对作文内容、组织、词语、语法以及技术失误等方面进行修改的。实证证明,同伴作文修改是英语作文教学的一种有效方式。

Scaffolding in the Second Language Learning of Target Forms in Peer Interaction

This study draws on sociocultural theory to explore how adult EFL learners interact with each other in learning target form in collaborative task performance. It investigates the features of scaffolding in peer collaboration in which a group of four Chinese undergraduate students are engaged in a writing task in an English enhancement course at a university in Hong Kong. The study also examines how the scaffolding categories affect the learners＇ production of appropriate grammatical forms. The findings advocate the presence of the teacher （or tutor） to direct learners＇ attention to important form-meaning connections in L2 pedagogical group activities due to the limitations of peer interaction.

AN EXPLORATORY STUDY OF CONDUCTING PEER REVIEW AMONG CHINESE COLLEGE STUDENTS

Peer review enjoys a solid theoretical foundation and has been widely used in L1 and L2 writing instructions, but remains rare in the EFL environment of China's Mainland. This study attempts to evaluate its use among Chinese students. It finds: (1) Conducting peer review to substitute for part of teacher feedback is as effective as relying completely on the teacher for feedback; (2) Most Chinese students like to get feedback from their peers and think it is useful to them; (3) Chinese students are already capable of effective peer revision, which can also stimulate self-revision.

Patterns of Peer Review in an EFL Writing Course in China

Peer review is widely used in writing courses for both practical and pedagogical reasons, but little has been published on the characteristics of Chinese EFL learners＇ review patterns. This study aimed to explore the types of peer comments, their distribution, and related factors in a Chinese context. It collected and analyzed in NVivo and SPSS 829 peer reviews, survey data, and students＇ writing and reading scores. Results show that more than half of the comments focused on language, one third on social talk, and about ten percent on content and organization. Multiple regression results show that content score, organization score, good attitude, procrastination, and assignment type were related to the distribution and the length of comments, but many other influencing factors are to be revealed in future research.

SYNCHRONOUS LEARNING NETWORK:HOW COLLEGE STUDENTS USE PEER ASSESSMENT TECHNIQUES IN EVALUATION OF THEIR WRITING

This study investigated how students used peer assessments in synchronous learning network (SLN) to assess each other s writing. It focused on examining the frequency and styles of various techniques students employed while assessing each others writing and student response to assessing each other s writing in a SLN context. The findings indicated that these students received many assessments during each peer assessment activity. They preferred to use assessing techniques of less critical types, and had po...

A Study into Students' Views on Guided Peer Feedback in Group Work

Peer feedback is a key to the quality of group work in foreign language classrooms. In order to better understand the use of peer feedback in spoken English, a ten-week study was conducted by combining peer feedback with group work. Based on Scaffolding Instruction of Constructivism, this study chose three different tools - a checklist, a qualitative feedback sheet and a grading sheet, to guide peer feedback. A questionnaire survey and three interviews were adopted to investigate the students＇ views and attitude toward guided peer feedback. We found： （1） Guided peer feedback plays a positive role in improving the quality of group work and its three forms were positively received by the participants; （2） Among the three tools - the checklist, the qualitative feedback sheet and the grading sheet, the grading sheet was most welcomed; （3） Only by designing the appropriate peer feedback forms and the tasks at the same time, could peer feedback achieve good results.

Numerical investigation of the influence of companion drops on drop-on-demand ink jetting

In this study we characterized and investigated the specific phenomenon of "companion drops" in the drop-ondemand(DOD) ink jetting process.A series of simulations based on a piezoelectric DOD printhead system is presented,adapting the volume-of-fluid(VOF) interface-capturing method to track the boundary evolution and model the interfacial physics.The results illustrate the causality between the generation of companion drops and droplet deviation behavior,as well as their close correlations with ink jetting straightness and printing accuracy.The characteristics of companion drops are summarized and compared with those of satellite drops.Also,a theoretical mechanism for the generation of companion drops is presented,and their effects and behaviors are analyzed and discussed.Finally,the effects of critical factors on the generation of companion drops are investigated and characterized based on variations in the printable pressure range.Recommendations are given for the suppression of companion drops and for the improvement of printing accuracy.

TOEPLITZ OPERATORS AND ALGEBRAS ON DIRICHLET SPACES

The automorphism group of the Toeplitz C^*- algebra, J(C^1), generated by Toeplitz op-erators with C^1-symbols on Dirichlet space D is discussed; the K0, K1-groups and the first cohomology group of J(C^1) are computed. In addition, the author proves that the spectra of Toeplitz operators with C^1-symbols are always connected, and discusses the algebraic prop-erties of Toeplitz operators.In particular, it is proved that there is no nontrivial selfadjoint Toeplitz operator on D and Tψ^* = Tψ^- if and only if Tψ is a scalar operator.