Determination of the magnetic anisotropy axes of single-molecule magnets

Simple methods are presented allowing the determination of the magnetic anisotropy axes of a crystal of a single-molecule magnet (SMM). These methods are used to determine an upper bound of the easy axis tilts in a standard Mn12-Ac crystal. The values obtained in the present study are significately smaller than those reported in recent high frequency electron paramagnetic resonance (HF-EPR) studies which suggest distributions of hard-axes tilts.Comment: 10 pages, 6 figure

Gender and migration: IMISCOE short reader

This open access short reader offers a critical review of the debates on the transformation of migration and gendered mobilities primarily in Europe, though also engaging in wider theoretical insights. Building on empirical case studies and grounded in an analytical framework that incorporates both men and women, masculinities, sexualities and wider intersectional insights, this reader provides an accessible overview of conceptual developments and methodological shifts and their implications for a gendered understanding of migration in the past 30 years. It explores different and emerging approaches in major areas, such as: gendered labour markets across diverse sectors beyond domestic and care work to include skilled sectors of social reproduction; the significance of families in migration and transnational families; displacement, asylum and refugees and the incorporation of gender and sexuality in asylum determination; academic critiques and gendered discourses concerning integration often with the focus on Muslim women. The reader concludes with considerations of the potential impact of three notable developments on gendered migrations and mobilities: Black Lives Matter, Brexit and COVID-19. As such, it is a valuable resource for students, academics, policy makers, and practitioners.

Investigating the impact of e-customer relationship management on hotels ´website service quality

As online tourists are becoming more price sensitive, less brand loyal and more sophisticated, e- Customer Relationship Management (CRM) becomes a strategic necessity for attracting and increasing guests’ patronage. Despite the vital role of eCRM for e-commerce success, its deployment frequently fails or it does not always deliver the expected results. The latter has boosted research, but studies have been primarily focused on investigating eCRM implementation from a company’s perspective ignoring its customer perspective. In this vein, the purpose of this study is to investigate the impact of eCRM on hotels’ website service quality as perceived by their guests. To achieve that, first the concept of eCRM is analysed and then, a customer-centric eCRM model that directly identifies eCRM impact on e-services is proposed and used for measuring hotels’ eCRM practices. Later, a literature review synthesizes the concept and dimensions of website service quality providing a scale of website service quality measurement. Data from eCRM hotels guests were gathered and findings provide useful implications for successful implementing eCRM and enhancing website service quality. Finally, the limitations of the study and directions for future research are discussed

Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets

Three terminal single-electron transistor devices utilizing Al/Al2O3 gate electrodes were developed for the study of electron transport through individual single-molecule magnets. The devices were patterned via multiple layers of optical and electron beam lithography. Electromigration induced breaking of the nanowires reliably produces 1-3 nm gaps between which the SMM can be situated. Conductance through a single Mn12(3-thiophenecarboxylate) displays the coulomb blockade effect with several excitations within +/- 40 meV.Comment: 10 pages, 5 figure

Three-Loop Results in QCD with Wilson Fermions

We calculate the third coefficient of the lattice beta function in QCD with Wilson fermions, extending the pure gauge results of Luescher and Weisz; we show how this coefficient modifies the scaling function on the lattice. We also calculate the three-loop average plaquette in the presence of Wilson fermions. This allows us to compute the lattice scaling function both in the standard and energy schemes.Comment: 3 pages, LaTeX (fleqn.sty, espcrc2.sty), contribution to Lattice'97. Table caption corrected. The longer write-ups are in hep-lat/9801007 (beta function) and hep-lat/9801003 (plaquette

Rice endosperm is cost-effective for the production of recombinant griffithsin with potent activity against HIV

Protein microbicides containing neutralizing antibodies and antiviral lectins may help to reduce the rate of infection with human immunodeficiency virus (HIV) if it is possible to manufacture the components in large quantities at a cost affordable in HIV‐endemic regions such as sub‐Saharan Africa. We expressed the antiviral lectin griffithsin (GRFT), which shows potent neutralizing activity against HIV, in the endosperm of transgenic rice plants (Oryza sativa), to determine whether rice can be used to produce inexpensive GRFT as a microbicide ingredient. The yield of (OS)GRFT in the best‐performing plants was 223 μg/g dry seed weight. We also established a one‐step purification protocol, achieving a recovery of 74% and a purity of 80%, which potentially could be developed into a larger‐scale process to facilitate inexpensive downstream processing. (OS)GRFT bound to HIV glycans with similar efficiency to GRFT produced in Escherichia coli. Whole‐cell assays using purified (OS)GRFT and infectivity assays using crude extracts of transgenic rice endosperm confirmed that both crude and pure (OS)GRFT showed potent activity against HIV and the crude extracts were not toxic towards human cell lines, suggesting they could be administered as a microbicide with only minimal processing. A freedom‐to‐operate analysis confirmed that GRFT produced in rice is suitable for commercial development, and an economic evaluation suggested that 1.8 kg/ha of pure GRFT could be produced from rice seeds. Our data therefore indicate that rice could be developed as an inexpensive production platform for GRFT as a microbicide component

Fermionic criticality of anisotropic nodal point semimetals away from the upper critical dimension: Exact exponents to leading order in \frac{1}{N_{ƒ}}

We consider the fermionic quantum criticality of anisotropic nodal point semimetals in d = d_{L} +d_{Q} spatial dimensions that disperse linearly in d_{L} dimensions, and quadratically in the remaining d_{Q} dimensions. When subject to strong interactions, these systems are susceptible to semimetal-insulator transitions concurrent with spontaneous symmetry breaking. Such quantum critical points are described by effective field theories of anisotropic nodal fermions coupled to dynamical order parameter fields. We analyze the universal scaling in the physically relevant spatial dimensions, generalizing to a large number N_{f} of fermion flavors for analytic control. Landau damping by gapless fermionic excitations gives rise to nonanalytic self-energy corrections to the bosonic order-parameter propagator that dominate the long-wavelength behavior. We show that perturbative momentum shell RG leads to nonuniversal, cutof-dependent results, as it does not correctly account for this nonanalytic structure. In turn, using a completely general soft cutoff formulation, we demonstrate that the correct IR scaling of the dressed bosonic propagator can be deduced by enforcing that results are independent of the cutoff scheme. Using the soft cutoff RG with the dressed dynamical RPA boson propagator, we compute the exact critical exponents for anisotropic semi-Dirac fermions (d_{L} = 1, d_{Q} = 1) to leading order in 1/N_{f} and to all loop orders. Applying the same method to relativistic Dirac fermions, we reproduce the critical exponents obtained by other methods, such as conformal bootstrap. Unlike in the relativistic case, where the UV-IR connection is reestablished at the upper critical dimension, nonanalytic IR contributions persist near the upper critical line 2d_{L} + d_{Q} = 4 of anisotropic nodal fermions. We present E expansions in both the number of linear and quadratic dimensions. The corrections to critical exponents are nonanalytic in E, with a functional form that depends on the starting point on the upper critical line