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Finite divisibility of general systems is shown. Based on this result, Lavoisier’s Axiom, introduced in 1789, is verified by using the concept of basic particles, where a basic particle is one particle which can no longer be divided into smaller ones. The conservation principle of ancient atomists is recasted and proved mathematically, based on which the law of conservation of matter‐energy can be seen clearly. A brief history of atoms, elements, and laws of conservation is given and some important open questions are posed.

The purpose of this paper is to reaffirm the suggestion that there are at least two distinct types of laws of trade-off that affect all firms and, in doing so, to contribute toward resolving the persistent trade-off debate in the literature.

Conceptual study using implicit deductive reasoning.

Two types of trade-offs are identified: “internal” can be understood following the dictates of the law of diminishing returns, while “external” can be modeled using the principle of energy conservation.

New insights are provided by discussing the impact of both laws of trade-off on the resource-based view of the firm, on new capabilities such as sustainability and innovativeness and on key strategic choices.

The study explains why trade-offs occur and outlines contextual factors that determine the “strength” of the trade-offs.

To the best of the authors’ knowledge, no previous study has attempted to investigate the topic of strategic trade-offs on the basis of the principle of energy conservation.

The Baduy tribe has its own uniqueness and values regarding the forest; it manages the forest using customary law to keep it sustainable. This research aims to describe the position of customary law used by the Baduy tribe to conserve forest areas.

This research is a qualitative research conducted in September 2019 and 2020 at Baduy. The data were collected through a literature study and in-depth interviews with informants related to the Baduy tribe. The collected data included documentation and interview transcripts that were translated into English. Data analysis was conducted in a descriptive manner, equipped with related evidence.

The Baduy community holds firm to its customs and culture called pikukuh. The Baduy community applies the concept of sustainable forest management in that local communities are directly involved in forest management activities to improve welfare and implement sustainable forests.

The implication of this research is that it is beneficial for forest conservation based on customary law, using the conservation approach of the Baduy tribe as a local community in protecting the sustainability of forest resources and their sustainability for the next generation. This study contributes as a guide for the government to formulate policies that will include local communities into conservation programs and government policies. It may apply to a study of coordination with related institutions such as the Ministry of Environment and Forestry in implementing forest conservation.

This study uses primary data from the Baduy tribe, which has unique local traditional values regarding the territory and the important role of the forest. The originality of the findings from the excavation of each activity was based on the procedures and beliefs regulated in customary law regarding forest management. Preservation of traditional knowledge in customary law has contributed to the urgency of sustainable forest conservation and biodiversity conservation, which is part of the traditional knowledge of the Baduy tribe.

This paper aims to present a discussion to stimulate interest in further research by highlighting aspects of Ontario’s Environmental Bill of Rights and exploring whether parts can be transplanted to improve sustainability in China.

In this paper, the authors trace the evolution of environmental law in China after 1978, identify increased citizen participation as a path to improvement and provide an overview of purposes and means in Ontario’s Environmental Bill of Rights which may be a model to consider.

Ontario’s Environmental Bill of Rights may have aspects to be added to China’s legal toolbox warranting further research.

While this descriptive review identifies possibilities, further work is required to apply legal concepts from one jurisdiction to another. Context and details of implementation warrant further attention.

This paper provides a platform from which further more detailed research may advance sustainability in China by considering a legal framework used by others to integrate the development of society, economy and environment.

The purpose of this paper is to present the residual power series method for solving the space time fractional variable coefficients Ito system.

A weighted algorithm based on the residual power series method is used numerical solution of the space time fractional Ito system variable coefficients. The authors show that this technique yields the analytical solution of the desired problem in the form of a rapidly convergent series with easily computable components.

The authors illustrate that the proposed method produces satisfactory results with respect to the other semi analytical methods. The reliability of the method and the reduction in the size of computational domain give this method a wider applicability.

This research presents, for the first time, a new modification of the proposed technique for aforementioned problems and some interesting results are obtained.

The purpose of this paper is to obtain the nonlinear Schrodinger equation (NLSE) numerical solutions in the presence of the first-order chromatic dispersion using a second-order, unconditionally stable, implicit finite difference method. In addition, stability and accuracy are proved for the resulting scheme.

The conserved quantities such as mass, momentum and energy are calculated for the system governed by the NLSE. Moreover, the robustness of the scheme is confirmed by conducting various numerical tests using the Crank-Nicolson method on different cases of solitons to discuss the effects of the factor considered on solitons properties and on conserved quantities.

The Crank-Nicolson scheme has been derived to solve the NLSE for optical fibers in the presence of the wave packet drift effects. It has been founded that the numerical scheme is second-order in time and space and unconditionally stable by using von-Neumann stability analysis. The effect of the parameters considered in the study is displayed in the case of one, two and three solitons. It was noted that the reliance of NLSE numeric solutions properties on coefficients of wave packets drift, dispersions and Kerr nonlinearity play an important control not only the stable and unstable regime but also the energy, momentum conservation laws. Accordingly, by comparing our numerical results in this study with the previous work, it was recognized that the obtained results are the generalized formularization of these work. Also, it was distinguished that our new data are regarding to the new communications modes that depend on the dispersion, wave packets drift and nonlinearity coefficients.

The present study uses the first-order chromatic. Also, it highlights the relationship between the parameters of dispersion, nonlinearity and optical wave properties. The study further reports the effect of wave packet drift, dispersions and Kerr nonlinearity play an important control not only the stable and unstable regime but also the energy, momentum conservation laws.

Model description, observations, and prior knowledge are the three main sources of information that are used for the evaluation and estimation of complex systems. Here, model description is given based on the physical mechanism and dynamics of the system. Observational data represent a very important method of verification and can be applied to validate the model. Prior knowledge can help to provide additional information when observation data are not sufficient. On the basis of clearly carding the relationship between a system's observational quantities and the ultimate indices of the observation, the purpose of this paper is to establish the systemic yoyo model for systems evaluation.

Recent advances in systems science in general and the systemic yoyo model in particular are employed in this research as the fundamental logic of reasoning and thread of thinking.

After analyzing the characteristics and connections between the three main sources of information – model description, prior knowledge, and observational data – used in system evaluation and estimation, the authors derive the conservation law of information for system evaluation and estimation and analyze the transitional direction of the process of system evaluation and estimation.

This work lays down the theoretical basis for why certain procedures widely applied in system evaluations and estimations are correct and sound, on which reliable scientific conclusions can be drawn.

This work is the first of its kind that investigates the systemic foundation underlying the commonly applied procedures of system evaluations and estimations.

To improve the thermal performance of base fluid, nanoparticles of three types are dispersed in the base fluid. A novel theory of non-Fourier heat transfer is used for design and development of models. The thermal performance of sample fluids is compared to determine which types of combination of nanoparticles are the best for an optimized enhancement in thermal performance of fluids. This article aims to: (i) investigate the impact of nanoparticles on thermal performance; and (ii) implement the Galerkin finite element method (GFEM) to thermal problems.

The mathematical models are developed using novel non-Fourier heat flux theory, conservation laws of computational fluid dynamics (CFD) and no-slip thermal boundary conditions. The models are approximated using thermal boundary layer approximations, and transformed models are solved numerically using GFEM. A grid-sensitivity test is performed. The accuracy, correction and stability of solutions is ensured. The numerical method adopted for the calculations is validated with published data. Quantities of engineering interest, i.e. wall shear stress, wall mass flow rate and wall heat flux, are calculated and examined versus emerging rheological parameters and thermal relaxation time.

The thermal relaxation time measures the ability of a fluid to restore its original thermal state, called thermal equilibrium and therefore, simulations have shown that the thermal relaxation time associated with a mono nanofluid has the most substantial effect on the temperature of fluid, whereas a ternary nanofluid has the smallest thermal relaxation time. A ternary nanofluid has a wider thermal boundary thickness in comparison with base and di- and mono nanofluids. The wall heat flux (in the case of the ternary nanofluids) has the most significant value compared with the wall shear stresses for the mono and hybrid nanofluids. The wall heat and mass fluxes have the highest values for the case of non-Fourier heat and mass diffusion compared to the case of Fourier heat and mass transfer.

An extensive literature review reveals that no study has considered thermal and concentration memory effects on transport mechanisms in fluids of cross-rheological liquid using novel theory of heat and mass [presented by Cattaneo (Cattaneo, 1958) and Christov (Christov, 2009)] so far. Moreover, the finite element method for coupled and nonlinear CFD problems has not been implemented so far. To the best of the authors’ knowledge for the first time, the dynamics of wall heat flow rate and mass flow rate under simultaneous effects of thermal and solute relaxation times, Ohmic dissipation and first-order chemical reactions are studied.

The purpose of this paper is to study a gas bubble flowing in a micro-channel filled with liquid and to quantify the compressibility effects induced in the bubble by a heat supply at the walls of the channel.

The paper presents a model and its numerical implementation. A hybrid method combining front-tracking techniques and a Heaviside step function is introduced to ensure an accurate satisfaction of the mass and energy conservation laws.

Compressibility effects in the bubble are quantified. Test cases for numerical simulations of two-phase flows involving heat transfer are proposed.

The authors present original test cases in which expansion or compression of a gas bubble flowing in a liquid are induced by heat transfer at the wall.

The purpose of this paper is to introduce and discuss policy making process in the field of climate change in China. It aims to describe the main climate change‐related policies and to discuss the role of China in international climate change negotiations.

A qualitative method has been used for this paper. A preliminary desk study based on the analysis of the primary and secondary sources published in both English and Chinese (Mandarin) has been conducted. Literature on policy analysis and evaluation and the role of political actors in it, as well as examples of energy efficiency studies in other countries has been studied to develop an analytical framework for the empirical data interpretation. The main sources for information about China's situation are books, articles, as well as internet resources and newspapers covering China's politics, the climate change regime, and Chinese climate policy.

The paper provides insights into China's climate change policy making process and outlines the main challenges that policy implementation in China is facing today.

It was appreciated that some sources should be used with caution as information given in Chinese is subject to censorship and governmental control in China and therefore may be biased. It is not possible to avoid this problem totally when dealing with a state like China, but using multiple sources and personal observation may improve the reliability of the information.

The paper includes suggestions on policy improvements such as strengthening of supervision mechanisms and creating a Ministry of Energy.

This paper fulfils an identified need to study the climate change policy‐making process in China.