Intellectual Freedom, Cultural Exchange, and Nazi Germany: The Relationship Between the Deutsch-Ausländischer Buchtausch, University of Denver, and Other Cultural Heritage Institutions

Shortly after Hitler’s rise to power, the Prussian State Library was restructured, birthing a new entity – the Deutsch-Ausländischer Buchtausch (German Foreign Book Exchange, DAB). The DAB was responsible for exchanging books and serials with scholarly institutions worldwide. In 1936, the University of Denver (DU) received a gift of books from the DAB. Nearly fifty percent of the books would be categorized as Nazi propaganda or eugenics literature by current standards. Upon further research, it was discovered that the DAB’s relationships included Stanford, Yale, the Boston Museum of Fine Arts, the Metropolitan Museum of Art in New York City, the Royal Historical Society, the Society of Antiquaries of Scotland, the Institut d\u27Égypte, the Society for the Promotion of Hellenic Studies, the University of Bombay, and the countries of Spain and Portugal. This paper provides a detailed review of the DAB-DU case, an examination of the DAB, and reviews of DAB exchanges

Convex Constraint Decomposition of Circular Dichroism Curves of Proteins

A new algorithm, called convex analysis, has been developed to deduce the chiral contribution of the common secondary structures directly from experimental circular dichroism (CD) curves of a large number of proteins. The analysis is based on CD data reported by Yang et aU Test runs were performed on sets of artificial protein spectra created by the Monte Carlo technique using poly-u-Iysine based component spectra. Application of the decomposition algorithm for the created sets of spectra resulted in component spectra [B (2, i)] and weights [C (i, k)] with excellent Pearson correlation coefficients (r).2 The algori thm, independent of X-ray data, revealed that the CD spectrum of a given protein is composed of at least four independent sources of chirality. Three of the computed component curves show remarkable resemblance to the CD spectra of known protein secondary structures. This approach yields a significant improvement compared to the eigenvector analysis of Hennessey and Johnson." The new method is a useful tool not only in analyzing CD spectra but also in treating other decomposition problems where an additivity constraint is valid

Hubungan Dukungan Sosial Teman Sebaya dengan perilaku Prokrastinasi pada Mahasiswa yang sedang mengerjakan skripsi: penelitian dilakukan kepada Mahasiswa Fakultas Psikologi UIN Sunan Gunung Djati Bandung angkatan 2012

Salah satu tugas yang harus dikerjakan mahasiswa tingkat akhir adalah mengerjakan skripsi. Hal yang sering terjadi pada mahasiswa tingkat akhir yaitu terjadinya penundaan dalam mengerjakan tugas akhir yang disebut prokrastinasi akademik. Menurut Solomon dan Rothblum (1984) Prokrastinasi adalah kecenderungan menunda memulai menyelesaikan tugas dengan melakukan aktivitas lain yang tidak berguna sehingga tugas menjadi terhambat, tidak selesai tepat waktu, dan sering terlambat. Menurut Lazarus dan Folkman (1984) agar mahasiswa mampu melakukan mekanisme copying efektif dengan mengarahkan pikiran dan perilakunya untuk mengatasi tuntutan-tuntutan yang muncul selama penyelesaian skripsi, maka diperlukan kemampuan pemecahan masalah, pikiran positif dan dukungan sosial. Melalui dukungan yang diberikan teman sebayanya strategi copying yang maladaftif seperti prokrastinasi dalam menyelesaikan skripsi dapat dikurangi atau diganti dengan strategi copying yang lebih efektif, yaitu dengan terfokus mengerjakannya sesuai dengan kapasitasnya. Penelitian ini bertujuan untuk mengetahui hubungan antara dukungan sosial teman sebaya dengan perilaku prokrastinasi akademik pada mahasiswa yang sedang mengerjakan skripsi di Fakultas Psikologi UIN Sunan Gunung Djati Bandung angkatan 2012. Subjek penelitian ini adalah 51 mahasiswa Fakultas Psikologi UIN Sunan Gunung Djati Bandung angkatan 2012. Analisis data menggunakan teknik rank spearman. Berdasarkan hasil analisis ststistik diperoleh hasil r_s=-0,29 dengan P_value= 0,039 dan α = 0,05 (P_value< 0,05) yang berarti H_(0 )ditolak. Artinya, terdapat hubungan yang signifikan antara dukungan sosial teman sebaya dengan prokrastinasi akademik pada mahasiswa Fakultas Psikologi UIN Sunan Gunung Djati Bandung angkatan 2012 dalam menyusun skripsi. Hasil penelitian ini menunjukan taraf signifikansi sebesar 8,41% yang diberikan dukungan sosial teman sebaya terhadap prokrastinasi akademik, sehingga 91,59% sisanya dipengaruhi faktor lain

Design of a spring-integrated crutch for ascending stairs

Thesis (S.B.)--Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.Cataloged from PDF version of thesis. "June 2013."Includes bibliographical references (page 27).Using conventional underarm or forearm crutches is uncomfortable and awkward. Further, underarm crutches make climbing stairs difficult and unsafe. One may climb stairs with forearm crutches, which do not impede elbow movement, but doing so is fatiguing and requires upper body strength. In 2011, MIT Media Lab researcher Madalyn Berns demonstrated that incorporating into the crutch an elastic element that spans the elbow joint could reduce the metabolic cost of crutching up stairs. The elastic element stores energy when compressed by the biceps; the stored energy then aids the triceps in levering the user up the stairs. This thesis developed a safer, sleeker, and more comfortable spring-integrated crutch. The novel design uses a torsion spring to store energy during elbow flexion. The spring is compressed between a forearm cuff and an upper arm cuff. The design allows the patient to reduce metabolic cost by using upper arm muscles more effectively.by Jennifer B. Fasman.S.B

Studies on I. A Reinvestigation of the Kinetics of the Urease Catalyzed Hydrolysis of Urea. II. Attempted Purification of the Adrenocorticotropic Hormone. III. Instrumental Adsorption Analysis. IV. The Effect of the Diphenyl Hydantoin (Dilantin) on the Ether Narcosis in the Cat

In an investigation of the factors operative in the urease-catalyzed hydrolysis of urea in aqueous solutions, buffered at pH 7.0 with sodium or potassium phosphate, it has been found that both of the buffer components participate in the hydrolytic reaction. The buffer anion apparently functions as an activator and the buffer cation as an inhibitor. Sodium phosphate buffer displays a greater inhibitory action in the urease-catalyzed hydrolysis of urea than does an equivalent concentration of potassium phosphate buffer. After dialysis of urease solutions the activity in the presence of organic-inorganic buffers, e.g., ethylenedianine phosphate, was found to be greater than that of the initial preparation. The order of activation of the enzyme for the investigated anions as their ehtylenedianine salts is citrate > phosphate > maleate > sulphate > chloride > acetate. The activity of the enzyme increases with increased concentrations of these buffers. Attempted purifications of three samples of adrenocorticotropic hormone, RN 145, RN 146 and RN 147, resulted in the following conclusions. Paper chromatography revealed three components in RN 145, two in RN 146 with a possible third; and three in RN 147 with a possible fourth. Further work on sample RN 147 indicated five moieties by electrophoresis on paper, five with a possible sixth by dinitrophenylation and chromatography and a separation into five components by dialysis and fractional ammonium sulphate precipitation. The machine built for Instrumental Adsorption Analysis at the California Institute of Technology was put into operation. Successful separations of fatty acid mixtures and an isomeric cis-trans mixture were achieved. Attempted resolution of the adrenocorticotropic hormone indicated non-homogeneity. The administration of diphenyl hydantoin (dilantin) in a dose of fifty milligrams per kilogram bodyweight was observed to potentiate the narcotic effect of ether. It caused a forty percent decrease in blood ether concentration necessary to suppress the knee jerk of the cat. This supports the thesis that the depolarizing effects of ether and diphenyl hydantoin are additive and that depolarization is an important factor in the narcotic effect of ether on central conduction.</p

Biomacromolecular stereostructure mediates mode hybridization in chiral plasmonic nanostructures

The refractive index sensitivity of plasmonic fields has been exploited for over 20 years in analytical technologies. While this sensitivity can be used to achieve attomole detection levels, they are in essence binary measurements that sense the presence/absence of a predetermined analyte. Using plasmonic fields, not to sense effective refractive indices but to provide more “granular” information about the structural characteristics of a medium, provides a more information rich output, which affords opportunities to create new powerful and flexible sensing technologies not limited by the need to synthesize chemical recognition elements. Here we report a new plasmonic phenomenon that is sensitive to the biomacromolecular structure without relying on measuring effective refractive indices. Chiral biomaterials mediate the hybridization of electric and magnetic modes of a chiral solid-inverse plasmonic structure, resulting in a measurable change in both reflectivity and chiroptical properties. The phenomenon originates from the electric-dipole–magnetic-dipole response of the biomaterial and is hence sensitive to biomacromolecular secondary structure providing unique fingerprints of α-helical, β-sheet, and disordered motifs. The phenomenon can be observed for subchiral plasmonic fields (i.e., fields with a lower chiral asymmetry than circularly polarized light) hence lifting constraints to engineer structures that produce fields with enhanced chirality, thus providing greater flexibility in nanostructure design. To demonstrate the efficacy of the phenomenon, we have detected and characterized picogram quantities of simple model helical biopolymers and more complex real proteins

The Genetic Code as a Periodic Table: Algebraic Aspects

The systematics of indices of physico-chemical properties of codons and amino acids across the genetic code are examined. Using a simple numerical labelling scheme for nucleic acid bases, data can be fitted as low-order polynomials of the 6 coordinates in the 64-dimensional codon weight space. The work confirms and extends recent studies by Siemion of amino acid conformational parameters. The connections between the present work, and recent studies of the genetic code structure using dynamical symmetry algebras, are pointed out.Comment: 26 pages Latex, 10 figures (4 ps, 6 Tex). Refereed version, small changes to discussion (conclusion unaltered). Minor alterations to format of figures and tables. To appear in BioSystem