IMPACT OF PRIVATIZATION ON R&D ACTIVITIES: THE CASE OF TURKISH TELECOMMUNICATIONS INDUSTRY

The debates surrounding privatization have generally focused on comparison of the productivity performances of public and private firms in different countries on the bases of quantitative methods. The main purpose of this paper is to draw attention to a very important repercussion of foreign ownership through privatization that is the changing nature of the privatized firms’ R&D activities in a strategically very important industrial sector in a developing country. After presenting the case studies conducted in the two most important Turkish telecommunication equipment manufacturing firms with the background of the sector’s development history in Turkey, the paper will exhibit the impact of foreign ownership on the nature of firms’ R&D activities after privatization as a result of the parent firm’s global firm strategy. Finally, it will draw policy implications of such changes for developing countries’ technology capability development efforts as well as the countries’ technological dependence in a strategically important industry.Turkey; telecommunications industry; privatization; foreign ownership; R&D activities

Analisa Interferensi Antar Base Transceiver Station Pada Link Komunikasi Point To Point

Pada penelitian ini dilakukan analisa untuk mengetahui adanya interferensi antar BTS point to point dalam range frekuensi tertentu pada jaringan komunikasi CDM dengan menghitung rasio carrier to interference. Parameter-parameter yang digunakan untuk perhitungan rasio carrier to interference adalah free space loss, gain antena, power transmit, jarak, sudut antar BSC dan BTS, dan feeder loss. Hasil perhitungan carrier to interference dibandingkan dengan level threshold dari radiolink yang digunakan, sehingga dapat diketahui adanya interferensi atau tidak diantara BTS point to point. Perhitungan nilai carrier to interference untuk tiga kawasan di Surabaya yaitu urban CBD, sub urban dan urban residen. Hasil nilai rasio carrier to interference terbesar terdapat pada BTS Pacuan Kuda dengan nilai carrier to interference sebesar 171,10 dB, dengan BSC yang meng-cover BTS tersebut adalah BSC Kebalen, dan termasuk dalam lingkup wilayah urban CBD. Sedangkan nilai rasio carrier to interference terkecil terdapat pada BTS Sidotopo dengan nilai 0,99 dB, dengan BSC yang mengcover BTS tersebut adalah BSC Kapasan dan termasuk dalam lingkup wilayah urban CBD

Occupational and public field exposure from communication, navigation, and radar systems used for air traffic control

Electromagnetic exposure (occupational and general public) to 14 types of air traffic control (ATC) systems is assessed. Measurement methods are proposed for in situ exposure assessment of these ATC systems. In total, 50 sites are investigated at 1,073 locations in the frequency range of 255 kHz to 24 GHz. For all installations, typical and maximal exposure values for workers and the general public are provided. Two of the 14 types of systems, Non-Directional Beacons (NDB) (up to 881.6 V m(-1)) and Doppler Very High Frequency (VHF) Omni-directional Range (DVOR) (up to 92.3 V m(-1)), exhibited levels requiring recommended minimum distances such that the ICNIRP reference levels are not exceeded. Cumulative exposure of all present radiofrequency (RF) sources is investigated, and it is concluded that the ATC source dominates the total exposure in its neighborhood. Health Phys. 103(6):750-762; 201

DSP-based ionospheric radiolink using DS-CDMA and on-line channel estimation

In this paper, a new blind multiuser detection algorithm is presented. It can both cancel multiuser interference and estimate the multipath channel response in a blind way. The method has been specially conceived for low coherence bandwidth channels such as the ionospheric channel and exhibits very low computational requirements. Real-time measurements from a fully digital HF radio-link are presented that confirm the reliability of the method for the ionospheric channel.Peer ReviewedPostprint (published version

Design and implementation of an opportunistic network based on IEEE 802.15.4

Les xarxes de sensors sense fils constitueixen un dels principals àmbits on s'han focalitzat els esforços dels entorns acadèmics i de la indústria. Les xarxes de sensors sense fils possibiliten un ampli ventall d'aplicacions de control i monitorització, que permeten l'automatització de tasques i donen pas a nous paradigmes, com l'anomenada "intel·ligència ambiental", o "La Internet de les coses". Un dels escenaris d'interès dins de les xarxes de sensors, i també en altres tipus de xarxes, és el de les xarxes formades per dispositius que es mouen i que realitzen algun tipus de trajectòria repetitiva. Un exemple és el dels autobusos municipals, que segueixen una ruta preestablerta. Es pot aprofitar el fet que l'autobús passa tard o d'hora per tota la ruta, per recollir i transportar dades dels punts pels quals ha passat. En aquest tipus d'escenaris, es pot fer servir un encaminament anomenat oportunístic, que es basa en aprofitar la connectivitat entre els nodes en aquells moments en dos o més nodes són prou a prop. Aquest projecte proposa el disseny i implementació en dispositius reals IEEE 802.15.4 d'un sistema de xarxa oportunística per a la recollida de dades ambientals

Desain Robot Holonomic berbasis Roda Mecanum dengan Arm Manipulator

Movement systems of a mobile robot in an industry generally use the concept of differential drive or ackerman steering. However, both methods tend to have low mobility. This paper proposes an industrial mobile robot design with a holonomic concept using mecanum wheels to maneuver in all directions with better mobility. As a commonly used robot in the industrial field, an arm manipulator is combined with a mobile robot. The mobile robot and arm manipulator's mechanical design is made using software inventor and utilizing acrylic as its base material. The electronic design of the robot is created using Eagle software. After the robot manufacturing is complete, then a user interface is made using the processing IDE. Several robot tests are conducted to ensure that the designed robot runs appropriately. From the functional test results, parts of the robot can run well. The smallest error obtained is 5 cm for the robot heading test, and the most significant error is 20 cm. The testing of a servo motor, which is the arm manipulator's primary actuator, showed the highest error of only 2 degrees. Besides, the gripper of the arm manipulator can also hold objects properly