Audience and Revenue Concentration in Lithuanian Media Markets (2008–2019)

The article examines the change in audience and revenue concentration in the Lithuanian television, radio, internet, and newspaper markets in 2008–2019, as well as discusses the factors that determined the changes in media concentration and market structure. The study revealed that without any special measures to regulate media concentration in Lithuania, all four media revenue markets (television, radio, internet, and newspapers) have become highly concentrated. In terms of audience (circulation) concentration, the concentration of newspaper and television markets was divided between un concentrated and moderately concentrated areas, the radio audience was moderately concentrated, and the audience of internet news websites was highly concentrated. The results of the analysis show a tendency for audience concentration in media markets to be generally lower than income market concentration. Therefore, when legally defining a dominant position in media markets, it is recommended to set a lower value for audience share than for revenue market share.

The Magic Potion of Austerity and Poverty Alleviation: Narratives of political capture and inequality in the Middle East and North Africa

Dominant narratives promoting economic growth at the expense of state institutions and basic social services have long underpinned a neoliberal model of spiralling debt and austerity in the MENA region. This exacerbates political capture and inequality and takes shape in an environment of media concentration and shrinking civic space. It is important for change movements to understand dominant narratives in order to challenge and shift them. With the right tools, civil society organizations, activists, influencers and alternative media can start changing the myths and beliefs which frame the socio-economic debate and predetermine which policy options are accepted as possible and legitimate, and which are not.

Media Concentration: A Critical Political Economy Perspective

This article presents foundations of the analysis of media concentration from the perspective of the approach the critique of the political economy of the media and communication. It outlines the dangers and problems of media concentration, discusses the question of how to measure media concentration, identifies different types of media concentration, and gives a systematic overview of empirical studies of media concentration. As a result of the country comparison on a theoretical (macro) level with an analytically required high level of abstraction, first and foremost identities, commonalities and similarities with regard to the development of media concentration including its causes and consequences can be recognised. The author argues that media concentration also needs to be theorised. It distinguishes and discusses two such theoretical approaches: apologetic-normative competition theories of media concentration and critical-empirical theories of media concentration. Critical-empirical theories of media concentration situate media concentration in the context of the development of capitalism, which requires to use the critique of the political economy as theoretical foundation.

Optimization of a-Amylase Production from Bacillus Amyloliquefaciens using Taguchi method

α-amylase, an enzyme of industrial importance is used extensively in food, pharmaceutical, textile and detergent industries. Since, a substantial quantity of α-amylase isderived from microbial sources, manipulation of bacterial strain, fermentation conditions and media composition has a major effect on yield of enzyme. Bacillus amyloliqifaciens, obtained from MTCC culture collection was used to study the enhancement of α-amylase production using media concentration manipulation. Taguchi’s orthogonal array was designed for maximization of α-amylase output. The different media components selected as parameters to be optimized were calcium chloride, starch, tryptone, ammonium sulphate and glucose. The concentration of starch and tryptone demonstrated to have maximum effect on amylase production. The optimization strategy was successful in obtaining substantial increase in amylase production of about 2 folds as compared to the unoptimized medium.

TAGUCHI-BASED OPTIMIZATION OF HEAD AND NECK CT ANGIOGRAPHY: IN-VIVO ENHANCED TRIGGERED TIMING FOR 600 PATIENTS

The Taguchi-based optimization of head and neck CT angiography (CTA) using in-vivo enhanced triggered timing for 600 patients was accomplished in this study. A total of 600 patients were categorized into three (test, verification, and implementation groups with 360, 120, and 120 patients, respectively). The patients in the test group were randomly assigned into 18 sub-groups according to Taguchi L[Formula: see text](2[Formula: see text]) orthogonal array for optimizing factor combinations of head and neck CTA. The signal-to-noise ratio was defined as a high LRA/US ratio (both left and right arterial pressure divided by upper sinuses’ one) and low stdev. The seven factors of CTA were: (A) left- or right-hand injection; (B) tube current, mA; (C) kilovoltage peak, kVp; (D) contrast media concentration; (E) FOV; (F) flow rate of contrast media; and (G) rotation time for one CTA loop. With the Taguchi unique organization, 18 sub-groups (each containing 20 patients’ real LRA/US ratios) could cover 1458 cases and provide the appropriate reliability. The optimal factor combination was identified as follows: (A) left-hand injection, (B) tube current of 280[Formula: see text]mA, (C) 100[Formula: see text]kVp, (D) contrast media concentration of 60%, (E) FOV of 250[Formula: see text]mm, (F) contrast media flow rate of 4.0[Formula: see text]ml/s, and (G) rotation time for one CTA loop of 0.9[Formula: see text]s. The optimal suggestion was validated in the verification group with 120 patients and applied to the implementation group with 120 patients. The successful factor combination is instrumental in defining a standard protocol for medical staff in deriving the maximal LRA/US value ([Formula: see text]) of head and neck CTA.

Media Concentration in Spain: National, sectorial, and regional groups

In Spain, the media market structure is made up of very different media groups, making it necessary to identify and classify them in a clear and coherent manner. To do so, this article collects secondary information from media companies’ websites and from audience measurement institutions. Results identify 50 media groups with activity in the Spanish market. They are classified into three categories according to the type of outlet, including national, sectorial, and regional. The current structure is based on recent developments in the last four decades of democracy among newspapers, magazines, radio, television and digital media.

Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills

Product fineness during grinding in stirred media mills is mainly influenced by the specific energy input, the stress energy transferred by the colliding grinding media and the stress frequency. The stress energy from grinding media collisions is heterogeneously distributed in stirred media mills. Herein, in order to characterize the stress energy distribution and the local grinding media collision frequencies, the grinding media motion was calculated using discrete element method (DEM) simulations coupled with computational fluid dynamics (CFD). The local grinding media concentration, velocity profiles, grinding media collisions and stress energies were compared for varied total grinding media fillings and stirrer speeds. It was confirmed that the normalized grinding media velocity profile can be used to divide the grinding chamber into four types of zones that allow the modeling of the stress energy distribution. However, the collision frequency showed very different distributions for varied stirrer velocities and grinding media fillings.