GULF AIR ORDERS SIX A330S

Gulf Air has become the first Middle Eastcustomer for the A330,with an order forsix aircrafts.The contract,which also makesGulf Air the largest Airbus Industrie customerin the Middle East,was signed in Bahrain on13th November by His Excellency Salim binAli Assiyabi,President and Chief ExecutiveOfficer of Gulf Air,and Airbus

Just What the Doctor Ordered

WHEN Chinese pharmacologist Tu Youyou received the Nobel Prize in medicine bast year for rediscovering artmisinin, the herbal drug used in traditional Chinese medicine （TCM） to treat malaria Dr. Zoubida Rabehi had a sense of personal satis-faction.

What the Doctor Ordered China-Africa health summit builds on 50 vears of cooperation

Much of China＇s health assistance is used to expand Africa＇s capacity to be self- sufficient and boost its own economic development. China is supporting Africa＇s health progress through its investments in health research and development,

Stokes'first problem for the fourth order fluid in a porous half space

In this study, the flow of a fourth order fluid in a porous half space is modeled. By using the modified Darcy＇s law, the flow over a suddenly moving flat plate is studied numerically. The influence of various parameters of interest on the velocity profile is revealed.

A Family of Fifth-order Iterative Methods for Solving Nonlinear Equations

In this paper, we present and analyze a family of fifth-order iterative methods free from second derivative for solving nonlinear equations. It is established that the family of iterative methods has convergence order five. Numerical examples show that the new methods are comparable with the well known existing methods and give better results in many aspects.

Soliton Solutions for a Negative Order AKNS Equation

In this short paper,bilinear form of a negative order AKNS equation is given.The N-soliton solutions areobtained through Hiorta's direct method.

Soliton Solutions for a Negative Order AKNS Equation Hierarchy

In this paper,bilinear form of a negative order AKNS equation hierarchy is given.The soliton solutionsare obtained through Hiorta's direct method.

Unifying the theory of integration within normal-,Weyl- and antinormal-ordering of operators and the s-ordered operator expansion formula of density operators

By introducing the s-parameterized generalized Wigner operator into phase-space quantum mechanics we invent the technique of integration within s-ordered product of operators （which considers normally ordered, antinormally ordered and Weyl ordered product of operators as its special cases）. The s-ordered operator expansion （denoted by s…s ） formula of density operators is derived, which isρ=2/1-s∫d^2β/π〈-β｜ρ｜β〉sexp{2/s-1（s｜β｜^2-β＊α＋βa-αα）}s The s-parameterized quantization scheme is thus completely established.

Three-dimensional ordered hierarchically porous carbon materials for high performance Li-Se battery

Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three dimensional ordered hierarchically porous carbon(3D OHPC) materials with micro/meso/macropores are designed and synthesized for Li-Se battery. The porous structure is tuned by following the concept of the generalized Murray’s law to facilitate the mass diffusion and reduce ion transport resistance.The optimized 3D Se/OHPC cathode exhibits a very high 2 nd discharge capacity of 651 m Ah/g and retains 361 m Ah/g after 200 cycles at 0.2 C. Even at a high current rate of 5 C, the battery still shows a discharge capacity as high as 155 m Ah/g. The improved electrochemical performance is attributed to the synergy effect of the interconnected and well-designed micro, meso and macroporosity while shortened ions diffusion pathways of such Murray materials accelerate its ionic and electronic conductivities leading to the enhanced electrochemical reaction. The diffusivity coefficient in Se/OHPC can reach a very high value of 1.3 × 10^(-11)cm^(2)/s, much higher than those in single pore size carbon hosts. Their effective volume expansion accommodation capability and reduced dissolution of polyselenides ensure the high stability of the battery. This work, for the first time, established the clear relationship between textural properties of cathode materials and their performance and demonstrates that the concept of the generalized Murray’s law can be used as efficient guidance for the rational design and synthesis of advanced hierarchically porous materials and the great potential of 3D OHPC materials as a practical high performance cathode material for Li-Se batteries.

A Barefoot Doctor’s Manual as a“Medical Bible”:Medical Politics and Knowledge Transmission in China

This paper examines the origin,compilation,and circulation of A Barefoot Doctor’s Manual(Chijiao yisheng shouce赤脚医生手册),exploring the relationship between medical politics and knowledge transmission in China,and its impact on the promotion of Chinese medicine across the world.Barefoot doctors were a special group of rural medical practitioners active in a very special socio-political context.Various editions of barefoot doctor manuals and textbooks were published across China after the first publication of the Manual in 1969.The publication of these manuals and textbooks became an indelible hallmark of the“Cultural Revolution”(1966–1976),when political publications predominated.The Manual was not only a guide for barefoot doctors in their daily study and practice,but also a primary source of medical knowledge for ordinary people.In the middle of the 1970s,the Manual was translated into many languages and published worldwide.This paper argues that the publication of A Barefoot Doctor’s Manual embodied a public-oriented mode of knowledge transmission that emerged and was adopted during a very specific era,and though it was eventually substituted by a mode of training embedded in the formal medical education system,it demonstrated the impact of politics on medicine and health in the context of resource scarcity and low literacy.Changes in China’s geopolitical status,the West’s pursuit of alternative approaches to medicine and health,and the World Health Organization’s(WHO’s)concern over health universality and equity all contributed to the translation and circulation of the Manual,facilitating the dissemination of Chinese medicine worldwide.The paper thus presents empirical and theoretical contributions to research on the relationship between medical politics and knowledge transmission in China.

Construction of Wave-free Potentials and Multipoles in a Two-layer Fluid Having Free-surface Boundary Condition with Higher-order Derivatives

There is a large class of problems in the field of fluid structure interaction where higher-order boundary conditions arise for a second-order partial differential equation. Various methods are being used to tackle these kind of mixed boundary-value problems associated with the Laplace’s equation （or Helmholtz equation） arising in the study of waves propagating through solids or fluids. One of the widely used methods in wave structure interaction is the multipole expansion method. This expansion involves a general combination of a regular wave, a wave source, a wave dipole and a regular wave-free part. The wave-free part can be further expanded in terms of wave-free multipoles which are termed as wave-free potentials. These are singular solutions of Laplace’s equation or two-dimensional Helmholz equation. Construction of these wave-free potentials and multipoles are presented here in a systematic manner for a number of situations such as two-dimensional non-oblique and oblique waves, three dimensional waves in two-layer fluid with free surface condition with higher order partial derivative are considered. In particular, these are obtained taking into account of the effect of the presence of surface tension at the free surface and also in the presence of an ice-cover modelled as a thin elastic plate. Also for limiting case, it can be shown that the multipoles and wave-free potential functions go over to the single layer multipoles and wave-free potential.

The Transition of the international Order and China's Role

The international order is built on the principles of sovereign equality,national interests,great powers and respect for human rights among others.International rivalry and cooperation have existed side by side over the past few centuries,while the foundations of an international order have solidified.We are now seeing a transition in the international order that requires new innovative ways of thinking.China is seen as the key driver of these changes because of its unique status,pattern of growth and future potential.China should embrace this historic opportunity and take on its obligations to contribute to the birth of a new modern international order.

Controllability of fractional-order Chua's circuit

The ultimate proof of our understanding of nature and engineering systems is reflected in our ability to control them.Since fractional calculus is more universal, we bring attention to the controllability of fractional order systems. First,we extend the conventional controllability theorem to the fractional domain. Strictly mathematical analysis and proof are presented. Because Chua＇s circuit is a typical representative of nonlinear circuits, we study the controllability of the fractional order Chua＇s circuit in detail using the presented theorem. Numerical simulations and theoretical analysis are both presented, which are in agreement with each other.

THE EXACT ORDER OF |x-x_k|~s|I_k(x)|~t

In this paper we give the exact order of丨x-x_k丨~丨l_k(x)丨~for any fixed nonnegative integers s and t,which is n^(-s),n^(-s)lnn and n^(1-)for s≤t-2,s=t-1 and s≥t, respectively.

Georg Cantor’s Ordinals, Absolute Infinity&Transparent Proof of the Well-Ordering Theorem Cantor’s 1899 Letter to Dedekind

Georg Cantor’s absolute infinity, the paradoxical class Ω of all ordinals, a non-entity for which being called a “class” is an undeserved dignity, must be the ultimate vexation for mathematical philosophers who hold on to some residual realism in set theory. By careful use of Ω, we can rescue Georg Cantor’s 1899 “proof” sketch of the Well-Ordering Theorem (being generous, considering his declining health) by taking the contrapositive of his suggestion and adding Zermelo’s choice function, resulting in a concise and uncomplicated proof of the Well-Ordering Theorem.

[WS_(3)Cu_(2)]簇基超分子框的组装、结构及其三阶非线性光学响应

将二(4-吡啶)硫烷(L_(1))、4,4'-二(4-吡啶)二苯甲酮(L_(2))分别与(Et_(4)N)(Tp*WS_(3))(A)(Tp*=三(3,5-二甲基吡唑)氢合硼酸根)和[Cu(Me CN)_(4)]PF_(6)进行反应,得到2个W/Cu/S簇基超分子化合物[Tp*WS_(3)Cu_(2)(L_(1))]_(2)(PF_(6))_(2)·2Me CN·2CHCl_(3)(1·2Me CN·2CHCl_(3))和[Tp*WS_(3)Cu_(2)(L_(2))(Me CN)]_(2)(PF_(6))_(2)·4Me CN (2·4Me CN)。对配合物1·2Me CN·2CHCl_(3)和2·4Me CN分别进行了单晶X射线衍射、核磁、质谱、红外、紫外可见和元素分析表征。单晶X射线衍射分析表明,它们是由2个L_(1)/L_(2)配体连接2个[Tp*WS_(3)Cu_(2)]~+簇核形成的阳离子型簇基超分子框。核磁氢谱和高分辨电喷雾离子化质谱(HRESI-MS)证明它们在溶液中具有一定的稳定性。并利用Z扫描技术测试了超分子化合物1·2Me CN·2CHCl_(3)和2·4MeCN溶液的三阶非线性光学特性,测试结果表明它们的三阶非线性光学响应强于前驱体A。

Polarizabilities and Orientational Order Parameter in N-(p-n-Ethoxybenzylidene)- p-n-Alkoxy Anilines, 2O.Om LC Compounds

n.m, n.Om, nO.m and nO.Om compounds play an important role in the fundamental and applied aspects. As a part of our systematic studies of the above homologous series regarding the synthesis, characterization and phase transition studies, here the authors report the polarizabilities and orientational order parameter, S in N-(p-n-ethoxybenzylidene)-p-n-alkoxy anilines, 2O.Om with m = 3 to 10 liquid crystalline compounds except with m = 5 which has been already published. The rest of the compounds exhibit the nematic LC phase except with m = 10 which shows the smectic-C phase along the nematic phase which is originally not detected by Godzwon et al. But the author’s observations with TM and differential scanning calorimeter have shown the existence on SmC phase in addition to nematic phase. Further, SmC is clarified using the histogram technique whose details are given below and are published elsewhere. The orientstonal order parameter, S is estimated using different methods and compared with the value obtained from birefringence, δn = (ne – no) where no field model is used. It is observed in these compounds case as in other LC compounds Vuks isotropic model is favored compared to that of anisotropic model proposed by Neugebauer.

Deriving some quantum optical identities using the general ordering theorem

Using the newly introduced general ordering theorem by Sh/ihandeh and Bazrafkan, we derive and generalize some quantum optical identities and give their applications.

ZINDO-SOS Studies on Second-order Nonlinear Optical Properties of Thiophene S,S-Dioxide Chromophores

The second-order nonlinear optical properties of thiophene S,S -dioxides derivatives were studied by using the ZINDO-SOS method. The computed results show that the thiophene S,S -dioxide derivatives exhibit larger second-order polarizabilities than their thiophene precursors. In order to clarify the origin of the different NLO responses among these chromophores, their electron properties and frontier orbital properties were investigated as well. These thiophene S,S -dioxides derivatives are good candidates for their application in electro-optical device due to their high nonlinearities, good thermal and photo stabilities.