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One challenge of using nonlinear optical phenomena for practical applications is the need to perform phase-matching. Recently, epsilon-near-zero materials have been shown to demonstrate strong optical nonlinearities, in addition to their other unique properties. As suggested by their name, the permittivity of the material is close to zero for a certain wavelength range. We demonstrate that this small permittivity allows for efficient three-wave mixing interactions to take place in indium–tin–oxide thin films without the need for phase matching the pump and signal beams. The efficiency of the second-order nonlinear interactions is characterized, and cascaded three-wave mixing is demonstrated.

Abstract Photodynamic therapy (PDT) utilizes photosensitizers (PSs) to produce reactive oxygen species (ROSs) upon irradiation, which causes the shutdown of vessels and deprives the tumor of nutrients and oxygen, and in turn induces adverse effects on the immune system. However, significant efforts are needed to increase the efficiency in PDT in terms of light delivery to specific PSs for the clinical treatment of tumors located deep under the skin. Even though PDT offers a disease site-specific treatment modality, current efforts are directed to improve the solubility (in body fluids and injectable solvents), photostability, amphiphilicity (for tissue penetration), elimination, and systemic toxicity of traditional PSs based on porphyrin derivatives. Nanostructured materials show promising features to achieve most of such combined efforts. They can be artificially engineered to carry multiple theranostic agents onto targeted tumor sites. However, recent studies on photosensitive Cd-based nanostructures, mostly used in PDT, indicate that leeching of Cd2+ ions is stimulated when they are exposed to harsh biological conditions for continuous periods of time, thus making them acutely toxic and hindering their applications in in vivo settings. Since nanostructured materials are not completely immune to degradation, great strides have been made to seek new alternatives. In this review, we focus on the latest advances of Cd-free nanostructured metal transition sulfides (MTSs) as alternative PSs and study their high-energy transfer efficiency, rational designs, and potential applications in cancer-targeted PDT. Nanostructured MTSs are discussed in the context of their versatility to serve as phototherapy agents and superior properties, including their strong absorption in the NIR region, excellent photothermal conversion efficiency, controlled reactive oxygen species (ROS) production, versatile surface chemistry, high fluorescence, and structural and thermal stability. We discuss the latest advancements in correlating the self-aggregation of MTSs with their passive tumor cell targeting, highlighting their ability to efficiently produce ROSs, and mitigating their dark toxicity through polymeric functionalization. Treatment of deep-seated tumors by using these PSs upon preferential uptake by tumor tissues (due to the enhanced permeability and retention effect) is also reviewed. We finally summarize the main future perspectives of MTSs as next-generation PSs within the context of cancer theranostics. Graphical Abstract

Background & Purpose: Nowadays, being and moving in the direction of digital transformation in organizations has become a fundamental requirement, which requires rethinking the content of organizational culture. Since Asan-pardakht Company is a technology-oriented company and is familiar with digital transformations in organizational processes, the people working of human resources department of Asan-pardakht Company were examined as the research community in identifying digital cultural contexts. Methodology: This research has been done using qualitative approach and theme analysis method to analyze the data. Participants of the study were selected through purposive sampling method, which involved 12 individuals working in Asan-pardakht Company, including the deputy manager of human resources, human resources experts, and its employees. Findings: According to the research findings, five main categories including accompaniment context, functional context, processal context, systemic context, and maintenance context, have been identified as the main cultural contexts in order to digitalize the processes of human resource management. Qualitative research indicators were used to assess the study credibility, transferability, dependability, and confirmability which were confirmed. Conclusion: The results of this study showed that organizational culture, as one of the main infrastructures of digital transformations, has an adaptive and facilitating role in the optimal combination of human resources and technological resources of the organization. Digital Organizational culture, by integrating the attitudes, mindsets and performance of employees in accepting technological changes and using new systems, makes it possible to effectively align them to digital transformations.

Anti-angiogenic RNAi-based therapy can be considered as a possible strategy for the treatment of endometriosis (EM), which is the most common gynecological disease. Targeted delivery of siRNA therapeutics is a prerequisite for successful treatment without adverse effects. Here we evaluated the RGD1-R6 peptide carrier as a non-viral vehicle for targeted siRNA delivery to endothelial cells in vitro and endometrial implants in vivo. The physicochemical properties of the siRNA complexes, cellular toxicity, and GFP and VEGFA gene silencing efficiency were studied, and anti-angiogenic effects were proved in cellular and animal models. The modification of siRNA complexes with iRGD ligand resulted in a two-fold increase in gene knockdown efficiency and three-fold decrease in endothelial cells’ migration in vitro. Modeling of EM in rats with the autotransplantation of endometrial tissue subcutaneously was carried out. Efficiency of anti-angiogenic EM therapy in vivo by anti-VEGF siRNA/RGD1-R6 complexes was evaluated by the implants’ volume measurement, CD34 immunohistochemical staining, and VEGFA gene expression analysis. We observed a two-fold decrease in endometriotic implants growth and a two-fold decrease in VEGFA gene expression in comparison with saline-treated implants. RNAi-mediated therapeutic effects were comparable with Dienogest treatment efficiency in a rat EM model. Taken together, these findings demonstrate the advantages of RGD1-R6 peptide carrier as a delivery system for RNAi-based therapy of EM.

Public-private partnership (PPP) is a complex mechanism, which includes a variety of industry legislation, which together form a system of legislative regulation of relations at the interaction of private and public parties in the realization of long-term capital-intensive investment projects for the development of public infrastructure. The article describes the current state of PPP in the Russian Federation, the analysis of the main problems and needs integrated action (regulatory, institutional and investment) to improve and develop this project.

Islamophobia, as a problem, is often argued to be a rational choice by the stereotypical media coverage of Islam and Muslims, even though it points to the symptom rather than the root cause. Islamophobia reemerges in public discourses and part of state policies in the post-Cold War period and builds upon latent Islamophobia that is sustained in the long history of Orientalist and stereotypical representation of Arabs, Muslims, and Islam itself. The book What is Islamophobia? Racism, Social Movements and the State, edited by Narzanin Massoumi, Tom Mills, and David Miller offers a unique contribution to how best to define and locate the problem of demonizing Islam and Muslims in the contemporary period. The three scholars provide a more critical and structural approach to the subject by offering what they call the “five pillars of Islamophobia”, which are the following: (1) the institutions and machinery of the state; (2) the far-right, incorporating the counter-jihad movement; (3) the neoconservative movement; (4) the transnational Zionist movement; and (5) the assorted liberal groupings including the pro-war left and the new atheist movement. The UK-based research group correctly situates Islamophobia within existing power structures and examines the forces that consciously produce anti-Muslim discourses, the Islamophobia industry, within a broad political agenda rather than the singular focus on the media. Islamophobia emerges from the “Clash of Civilizations” ideological warriors and not merely as a problem of media stereotyping, representation, and over-emphasis on the Muslim subject. In this article, I maintain that Islamophobia is an ideological construct that emerges in the post-Cold War era with the intent to rally the Western world and the American society at a moment of perceived fragmentation after the collapse of the Soviet Union in a vastly and rapidly changing world system. Islamophobia, or the threat of Islam, is the ingredient, as postulated in Huntington’s “Clash of Civilizations” thesis that is needed to affirm the Western self-identify after the end of the Cold War and a lack of a singular threat or purpose through which to define, unify, and claim the future for the West. Thus, Islamophobia is the post-Cold War ideology to bring about a renewed purpose and crafting of the Western and American self.