A new species of Tipula (Lunatipula) from Turkey, close to T. (L.) imbecilla Loew (Diptera: Tipulidae)

Adescription, with figures, is presented of Tipula (Lunatipula) cillibema sp. n., a species from the province Mugla, Southwestern Turkey. The species is close to T. (L.) imbecilla Loew, from areas near Rhodos. Both species are assigned to the macroselene group sensu Mannheims (1965), and their position within this species group is discussed

Altering Credibility Through Short-term Government Branding: A Digital Framing Experiment

Government branding is a practice that can be tied to promoting an institution (long-term orientation) or a particular administration and its elected official (short-term orientation), using both physical and digital artifacts. Reviewing the related work in the literature, we document the existence and visibility of an administration-dependent government brand in a developing country by mining social media data and the Google 2019 Spanish corpus. We test the hypothesis that administration-dependent government iconography (e.g. a logo) can lead to a change in the perceived credibility of public information in digital environments. Using an experimental survey approach that parallels the application of framing, we find that short term orientated government iconography can be detrimental to the credibility of government institutions, while they can also be seen as social opportunity costs, as budgets invested in them can be capitalized in later elections and not in the mission of the temporarily branded government body

A capability-based context modelling method to enhance digital service flexibility

The thesis argues that the enterprises need to understand their application context to be able to offer flexible digital services. Furthermore, after analysing the state of research in Services Science, it concludes that different roles with varying backgrounds participate to design and implementation of digital services, which adds the need for alignment between those as a further challenge for flexibility. To fulfil this, the thesis designs a context modelling method and evaluates it by means of Design Science Research (DSR).Digitalisierung in der Dienstleistungökonomie erfordert, die Auswirkungen von veränderten Anwendungskontexten an die zu erbringenden Services genau zu verstehen. Es wird nach der Analyse des Standes der Technik in Services Science festgestellt, dass unterschiedliche Rollen in der Gestaltung und Umsetzung von Digital Services beteiligt sind, was die Notwendigkeit der Abstimmung zwischen diesen Rollen als eine wichtige Herausforderung an die Flexibilität stellt. Um ein solches Alignment zu erreichen, entwickelt dieser Beitrag eine Kontextmodellierungsmethode und evaluiert diese mittels DSR

A new Turkish Tipula (Lunatipula) species in the acuminata group (Diptera: Tipulidae)

A description, with figures, is presented of the new species Tipula (Lunatipula) murati from Turkey. The species belongs to the acuminata group sensu Mannheims, 1963, and its position within this species group is discussed

The Role of Money in Turkish Economy

A well functioning monetary policy requires the knowledge of the effects of monetary aggregates on output and inflation. In this study, we try to analyze the role of money in a monetary business cycle model in the case of Turkey during the 2006-2017 period. Estimation results of the structural model are also compared with single equations’ estimation results and it is found out that the results of the structural model and single equations are quietly different. The differences show that the results of single equation estimations should cautiously be interpreted. In the model, it is found out that real balances have effects on IS and Philips curves

A METHOD FOR CONTEXT MODELLING IN CAPABILITY MANAGEMENT

Enterprises exist in the context of their dynamically changing environment, which has a strong impact on service design and delivery. Within areas such as ambient intelligence or robotics, most relevant context has a physical nature. However, the context of an enterprise requires a different conceptual-ization of context awareness. Beyond physical context, enterprises need to be aware of their market, legal and social context. Moreover, in order to monitor context and configure services systematically, we need a context modelling method that is integrated within enterprise modelling and supports in-formation and communication technology (ICT) engineering and runtime. The work in this paper has been performed as part of developing Capability Driven Development (CDD), a new paradigm for ICT design where services are customised on the basis of the essential business capabilities and deliv-ery is adjusted according to the current context. The contributions of the paper are (i) the investiga-tion of industrial needs for context modelling, (ii) eCoM, a context modelling method for enterprise ICT addressing such needs, iii) application of the method in an industrial use case and (iv) the evolu-tion of eCoM based on various evaluation cycles by means of Framework for Evaluation in Design Science Research (FEDS)

A new approach for measuring viscoelastic properties of soft materials using the dynamic response of a spherical object placed at the sample interface

Background: There are several techniques to characterize the mechanical properties of soft materials, such as the indentation method and the method based on the application of a spherical object placed inside the sample. The indentation systems usually yield the elastic properties of materials and their mathematical models do not consider the inertia of the sample involved in motion and radiation damping, while placing an object inside the sample is not practical and this procedure can alter the mechanical properties of the sample for the method based on the application of a bubble/sphere placed inside the sample. Objective: A new approach for the identification of the viscoelastic properties of soft materials using the dynamic response of a spherical object placed at the sample interface was proposed. Methods: The spherical object placed at the sample interface was pressed using an electromagnet and the dynamic response of the spherical object was tracked using a high-speed camera, while the dynamic response of the spherical object placed at the sample interface was estimated using a comprehensive analytical model. The effects of the shear modulus, viscosity, Poisson’s ratio and density of the soft sample, the radius and density of the spherical object and the damping due to radiation were considered in this mathematical model. The shear modulus and viscosity of the soft sample were determined by matching the experimentally identified and theoretically estimated responses of the spherical object. Results: The shear moduli and viscosities of the three phantoms with the gelatin mass ratios of 0.20, 0.25 and 0.29 were measured to be 3450, 4300 and 4950 Pa and 12.5, 14.0 and 15.0 Pa⋅s, respectively. The shear modulus and viscosity of the phantom increases as the gelatin mass ratio increases. The frequency of oscillations of the hemisphere placed at the phantom interface increases as the gelatin mass ratio increases due to stiffness increase. Conclusions: After matching the experimental and theoretical steady-state displacements and amplitudes of oscillations of the hemisphere at the sample interface, the comparison of the experimentally identified and theoretically predicted frequency of oscillations further confirmed the identified material properties of the samples. The approach presented here is expected to provide valuable information on material properties in biomedical and industrial applications.WOS:0010826474000032-s2.0-85174051012ArticleUluslararası işbirliği ile yapılan - EVET2023YÖK - 2022-23Eki

Identification of the viscoelastic properties of soft materials using a convenient dynamic indentation system and procedure

The responses of soft structures such as tissue depend on their viscoelastic properties. Therefore, the knowledge of the elastic and damping properties of soft materials is of great interest. This paper presents the identification of the viscoelastic properties of soft materials using a convenient dynamic indentation system and procedure. Using an electromagnet, a force is applied to a rigid sphere located at the soft-material interface and the dynamic response of the sphere is recorded using a high-speed camera. The recorded video is processed to identify the displacement of the sphere as a function of time. The dynamic response of the sphere located at the soft-material interface is predicted using an analytical model that considers the shear modulus and density of the soft sample, the radiation damping due to shear waves, and the radius and density of the sphere. By matching the measured and predicted steady-state displacements of the sphere, the shear modulus of the soft sample is determined. The viscous damping ratio of the soft sample is identified by using an equivalent viscous damping ratio for the soft sample in the analytical model and matching the measured and predicted oscillation amplitudes of the sphere. Experiments and analyzes are performed using gelation phantoms with different mechanical properties, spheres of different materials and sizes, and different force levels to verify the system and procedure. Three experiments are performed for each gelation phantom, sphere, and external force, and the repeatability of the results is presented. The results show that the dynamic indentation system and procedure presented in this study can be conveniently used to determine the viscoelastic properties of soft materials in practical applications.WOS:000797600100022Scopus - Affiliation ID: 60105072Conference Proceedings Citation IndexProceedings PaperUluslararası işbirliği ile yapılmayan - HAYIR2022YÖK - 2021-22Oca