How Can Procurement Create (Sustainable) Public Value Under the Bipartisan Infrastructure Deal?

The economic response of the US government to the COVID-19 pandemic envisions massive investment in infrastructure construction. Yet, governments contract out public works and might lack the capacity to meet the increased demand for new construction. Drawing on a mix of survey and interview data, we identify critical deficiencies in contract capacity that might lead to a loss of public resources and further erode trust in the government. We propose a plan for restructuring public procurement systems and offer solutions around four foci: collaboration, training, flexibility, and sustainability. This transformation path would enhance government contract capacity and use markets to signal a demand for sustainable infrastructure and create public value in line with the strategic objectives of the Bipartisan Infrastructure Deal

Combination of two fat saturation pulses improves detectability of glucose signals in carbon-13 MR spectroscopy

In order to improve the fat suppression performance of in vivo 13C-MRS operating at 3.0 Tesla, a phantom model study was conducted using a combination of two fat suppression techniques; a set of pulses for frequency (chemical shift) selective suppression (CHESS), and spatial saturation (SAT). By optimizing the slab thickness for SAT and the irradiation bandwidth for CHESS, the signals of the –13CH3 peak at 49 ppm and the –13CH2– peak at 26 ppm simulating fat components were suppressed to 5% and 19%, respectively. Combination of these two fat suppression pulses achieved a 53% increase of the height ratio of the glucose C1β peak compared with the sum of all other peaks, indicating better sensitivity for glucose signal detection. This method will be applicable for in vivo 13C-MRS by additional adjustment with the in vivo relaxation times of the metabolites

Axiomatic Choice Theory Traveling between Mathematical Formalism, Normative Choice Rules and Psychological Measurement, 1944-1956

The following analysis is meant to contribute to a history of rational choice theory. More specifically, I provide a multi-layered account of rational choice theory in terms of its biography as a scientific object. I argue that its axiomatic version, choice theory traveled between different research sites, specified within the context of different mathematical formalisms and occupying different epistemic functions; it was being applied to prescribe rules of proper behavior, as representation of behavioral hypotheses, and as measurement device to capture individual values. New modifications of what I call 'axiomatic choice theory' did not fully replace old versions of it, which prevents the reconstruction of its 'travels' as a continuous process and acknowledges the different versions of axiomatic choice theory that are currently used in the social sciences, particularly in economics. Furthermore, by revealing the diversity of its manifestations within the context of social networks and within particular research sites, the account of axiomatic choice theory developed here will ultimately contributes to an explanation of the disunity and confusion surrounding current debates about rational choice theory and allows for providing a more nuanced picture of its nature and scope. Jacob Marschak's professional development is used as a guide through this history of axiomatic choice theory to illustrate its journey

The Arabic calligraphy. An identifying parameter in space, time and contents

The art of Arabic calligraphy is particularly considered in the Islamic world. However, it should not be forgotten that if writing was an important means of preserving and spreading the Koran, calligraphy has historically found widespread use even in areas not strictly religious, such as in the decoration of everyday objects. Throughout the history of Islam, the work of calligraphers has been researched and appreciated. Calligraphy and abstract representations have become the main means of artistic expression, since there was a belief that figurative art was a form of idolatry. Contemporary artists from the Islamic world, and not only, still use the legacy of calligraphic art to insert inscriptions or abstract figures in their works as if it were an identifying mark, a recognizable art form, a language that defines a belonging. Starting from the research and analysis developed during the master degree thesis , aimed at investigating the connections between the most widespread forms of artistic expression in the Islamic world (geometry, calligraphy and arabesque), we wanted to focus attention on one of these three art forms, probably the most important for Arabs, to highlight its importance linked to the past, its developments in space and time and its future potential