Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy

The effective Mott gap measured by scanning tunneling microscopy (STM) in the lightly doped Mott insulator $(\rm{Sr}_{1 -x}\rm{La}_x)_2\rm{IrO}_4$ differs greatly from values reported by photoemission and optical experiments. Here, we show that this is a consequence of the poor electronic screening of the tip-induced electric field in this material. Such effects are well known from STM experiments on semiconductors, and go under the name of tip-induced band bending (TIBB). We show that this phenomenon also exists in the lightly doped Mott insulator $(\rm{Sr}_{1 -x}\rm{La}_x)_2\rm{IrO}_4$ and that, at doping concentrations of $x\leq 4 \%$, it causes the measured energy gap in the sample density of states to be bigger than the one measured with other techniques. We develop a model able to retrieve the intrinsic energy gap leading to a value which is in rough agreement with other experiments, bridging the apparent contradiction. At doping $x \approx 5 \%$ we further observe circular features in the conductance layers that point to the emergence of a significant density of free carriers in this doping range, and to the presence of a small concentration of donor atoms. We illustrate the importance of considering the presence of TIBB when doing STM experiments on correlated-electron systems and discuss the similarities and differences between STM measurements on semiconductors and lightly doped Mott insulators.Comment: 9 pages, 5 figure

Entry Mode Choice of Multinational Banks

When expanding abroad, a multinational bank faces a trade-off between accessing a foreign country via cross border lending or a financial foreign direct investment, i.e. greenfield or acquisition entry. We analyze the entry mode choice of multinational banks and explicitly derive the entry mode pattern in the banking industry. Moreover, we show that in less developed banking markets, a trend towards cross border lending and acquisition entry exists. Greenfield entry prevails in more developed markets. Furthermore, we identify a tendency towards acquisition entry in small and towards greenfield entry in larger host countries

U.S. Customs and Border Protection: Trade Facilitation, Enforcement, and Security

[Excerpt] This report describes and analyzes import policy and CBP’s role in the U.S. import process. (The report does not cover CBP’s role in the U.S. export control system.) The first section of the report describes the three overarching goals of U.S. import policy and the tension among them. Second, the report provides a legislative history of customs laws, followed by an overview of the U.S. import process as it operates today. Third, the import process and CBP’s role in it are discussed. The final section highlights several policy issues that Congress may consider in its oversight role or as part of customs or trade legislation, including measures seeking to provide additional trade facilitation benefits to importers and others enrolled in “trusted trader” programs, to improve enforcement of intellectual property and trade remedy laws, to strengthen cargo scanning practices, and/or to promote modernization of customs data systems, among other issues. A list of trade-related acronyms used in the report is provided in Appendix A

Key issues in trade facilitation : summary of World Bank/European Union workshops in Dhaka and Shanghai in 2004

Trade facilitation is the ability of countries to deliver goods and services on time at the lowest possible cost. It has emerged as an important issue in unilateral, bilateral, and multilateral trade liberalization. Most countries have embarked on heroic reforms aimed at reducing transaction costs of trade. Thus, among the four new Singapore issues, there was least resistance from World Trade Organization (WTO) member countries to include trade facilitation in the Doha Round discussions. However, all countries are not equally placed in initiating reforms in the complex areas of customs procedures, transport and port logistics, harmonization of standards, and simplification of procedures. Trade facilitation reforms require a large volume of technical assistance for national capacity building. To facilitate what these reforms entail and what can be learned from cross-country experiences, the EU and the World Bank organized two workshops in Dhaka (South Asian countries) and Shanghai (East Asian countries) in 2004. Jointly they succeeded in bringing together renowned experts from multilateral organizations, selected bilateral donor community, the private sector, ex civil servants, and scholars. The participants were largely drawn from the relevant government departments and chambers of commerce and industry. This paper summarizes the main presentations in the workshops. It also indicates the areas that need more focus in future events. The paper should serve as a reference document for national policymakers and for future seminars and workshops on trade facilitation. It has also linked the presentations to the ongoing research work on trade facilitation.Common Carriers Industry,Transport and Trade Logistics,Environmental Economics&Policies,Economic Theory&Research,Trade Policy

Sequential localization of a complex electron fluid

Complex and correlated quantum systems with promise for new functionality often involve entwined electronic degrees of freedom. In such materials, highly unusual properties emerge and could be the result of electron localization. Here, a cubic heavy fermion metal governed by spins and orbitals is chosen as a model system for this physics. Its properties are found to originate from surprisingly simple low-energy behavior, with two distinct localization transitions driven by a single degree of freedom at a time. This result is unexpected, but we are able to understand it by advancing the notion of sequential destruction of an SU(4) spin-orbital-coupled Kondo entanglement. Our results implicate electron localization as a unified framework for strongly correlated materials and suggest ways to exploit multiple degrees of freedom for quantum engineering.Comment: 21 pages, 4 figures (preprint format

Finance and Innovation System or Chaos

The present paper discusses an important part of the framework conditions for innovation in a number of European countries (France, Italy, Spain, the Netherlands, the United Kingdom) as well Japan and the United States through a comparison of the development of the financial systems in these countries. The main focus is whether a convergence can be observed between what is traditionally perceived as market based and credit based systems respectively. Based on quantitative statistics it is concluded that a convergence has taken place, and it is becoming increasingly more difficult to divide national financial systems into two main categories based on quantitative data alone. But differences still remain, and the paper continues by discussing reasons for convergence and divergence respectively. These reasons include internationalization, differences in industrial structure, as well as changes in national and international regulation. Before turning to a discussion of the policy perspectives of the observed development the paper discusses the financial systems ability to finance different types of transactions.Financial systems; innovation financing; economic integration and convergence

Foreign Science and Engineering Presence in U.S. Institutions and the Labor Force

[Excerpt] The increased presence of foreign students in graduate science and engineering programs and in the scientific workforce has been and continues to be of concern to some in the scientific community. Enrollment of U.S. citizens in graduate science and engineering programs has not kept pace with that of foreign students in those programs. In addition to the number of foreign students in graduate science and engineering programs, a significant number of university faculty in the scientific disciplines are foreign, and foreign doctorates are employed in large numbers by industry. Few will dispute that U.S. universities and industry have chosen foreign talent to fill many positions. Foreign scientists and engineers serve the needs of industry at the doctorate level and also have been found to serve in major roles at the masters level. However, there are charges that U.S. workers are adversely affected by the entry of foreign scientists and engineers, who reportedly accept lower wages than U.S. citizens would accept in order to enter or remain in the United States. NSF data reveal that in 2005, the foreign student population earned approximately 34.7% of the doctorate degrees in the sciences and approximately 63.1% of the doctorate degrees in engineering. In 2005, foreign students on temporary resident visas earned 30.8% of the doctorates in the sciences, and 58.6% of the doctorates in engineering. The participation rates in 2004 were 28.5% and 57.3%, respectively. In 2005, permanent resident status students earned 3.8% of the doctorates in the sciences and 4.5% of the doctorates in engineering, slightly above the 2004 levels of 3.7% and 4.2%, respectively. Many in the scientific community maintain that in order to compete with countries that are rapidly expanding their scientific and technological capabilities, the country needs to bring to the United States those whose skills will benefit society and will enable us to compete in the new-technology based global economy. The academic community is concerned that the more stringent visa requirements for foreign students may have a continued impact on enrollments in colleges and universities. There are those who believe that the underlying problem of foreign students in graduate science and engineering programs is not necessarily that there are too many foreign-born students, but that there are not enough native-born students pursuing scientific and technical disciplines. Legislation has been introduced in the 110th Congress to attract foreign students in the scientific and technical disciplines. H.R. 1645, the Security Through Regularized Immigration and a Vibrant Economy Act of 2007, would provide, among other things, an expansion of the types of individuals who would no longer be subjected to the annual limits on legal immigrants. Included in this group would be those who (1) hold an advanced degree in science, mathematics, engineering, or technical fields and who have been working in the United States in a related field for three years on a nonimmigrant visa; and (2) been awarded a medical specialty certification based on post-doctoral training and experience in the United States

Guide to Australia’s national security capability

This paper provides a single consolidated picture of the capabilities that enable Australia to achieve national security outcomes in a range of environments, including domestically, at the border, offshore and in cyberspace. Introduction The period since 2001 has been transformative for Australia’s national security and our national security challenges continue to evolve. To meet these challenges, we need new ways to coordinate and develop our capability and to shape the national security environment. Significant advances have been made in recent years to build greater collaboration and interoperability across the national security community. However, the increasing complexity of national security threats requires an even more consistent and connected approach to capability planning that complements existing individual agency arrangements. To that end, the Government has developed a security classified National Security Capability Plan to provide a single consolidated picture of the capabilities that enable Australia to achieve national security outcomes. This Guide offers an overview of Australia’s national security capability planning. It identifies the functions performed by the national security community and how these achieve the objectives outlined in the National Security Strategy (2013). Capability planning is one of the tools that support Government to better consider how capabilities can be directed to meet national security objectives. This ensures that capability investment is focussed and that Government can give appropriate consideration to redirecting existing capabilities to meet new or emerging risks and opportunities. It also highlights areas where agencies’ capabilities are interdependent, identifying focus areas for collaboration and interoperability. Having a better understanding of our capabilities will help us to make more informed decisions about what we need. Australia’s national security arrangements are underpinned by a number of agencies working across areas such as diplomacy, defence, development, border protection, law enforcement and intelligence. Australia’s national security agencies include: Attorney-General’s Department (AGD) Australian Agency for International Development (AusAID) Australian Crime Commission (ACC) Australian Customs and Border Protection Service (ACBPS) Australian Federal Police (AFP) Australian Security Intelligence Organisation (ASIO) Australian Secret Intelligence Service (ASIS) Australian Geospatial-Intelligence Organisation (AGO) Australian Signals Directorate (ASD) Department of Agriculture, Fisheries and Forestry (DAFF) Department of Defence (Defence) Department of Foreign Affairs and Trade (DFAT) Department of Health and Ageing (DoHA) Department of Immigration and Citizenship (DIAC) Department of Infrastructure and Transport (DIT) Department of the Prime Minister and Cabinet (PM&C) Office of National Assessments (ONA). The Capability Plan brings together, for the first time, a single view of the capabilities maintained by these agencies with the exception of Defence capabilities. Defence has a separate established capability planning process that includes the Defence White Paper (2013) and Defence Capability Plan (2012). Defence is a key contributor to Australia’s national security arrangements including leading the coordination and delivery of national security science and technology and works in close cooperation with other national security agencies. Defence capabilities will continue to be managed through existing mechanisms, principally the Defence Capability Plan. For the first time, the Capability Plan, and the accompanying Guide to Australia’s National Security Capability, presents a unified picture of the capabilities that exist across non-Defence national security agencies. Together with other strategic planning tools, this work informs the broader national security planning cycle and supports the objectives and implementation of overarching policy documents such as the National Security Strategy and the Australia in the Asian Century White Paper. The Capability Plan complements the Defence Capability Plan and does not seek to duplicate it. It should also be noted that the Guide has not been designed to signal specific initiatives or tender opportunities. Such processes will continue to be managed by individual agencies