176,966 research outputs found
Peculiarities of inversion walls and singular points in oriented textures of nematic mesophase
No full textWOS: 000268197500010In this work the nature and peculiarities of the inversion walls and singular points, which can spontaneously arise or can be stimulated in the homeotropic and planar oriented textures of the thermotropic nematogens, have been investigated for large temperature interval. The interaction force and mean approach velocity of the singular points, having opposite optical sign, have been calculated. The optical mappings and sketches of the inversion walls and singularities, taking place in the oriented textures of the nematogens, are presented. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimResearch Foundation of Mugla University (Mugla, Turkey)Mugla Sitki Kocman University [2003/002]The author is grateful the Research Foundation of Mugla University (Mugla, Turkey) under (Grant No.2003/002) for partial support of this research. Part of the microphotographs has been made in Department of Physics, Ege University (Izmir, Turkey)
Thermo-morphological properties of the smectic C* mesophase in new chiral salicyaldimine liquid crystals
No full textSpecific textures and their temperature transformations in large temperature interval for the chiral smectic C* mesophase of new liquid crystalline materials, synthesized by our group, have been investigated in detail. Temperature dependences of the pitch of helical structure of the smectic C* mesophase have been determined for these materials. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
KONSTRUKSI PASANGAN CALON DALAM PILGUB JATENG 2008 OLEH MEDIA MASSA (KASUS PEMBERITAAN JAWA POS RADAR SEMARANG DAN SUARA MERDEKA)
No full textPilgub Jateng 2008 adalah pemilihan kepala daerah langsung pertama yang
terjadi di Jawa Tengah. Ada lima pasangan yang mencalonkan diri sebagai
gubernur-wakil gubernur. Mereka adalah Bambang Sadono-M. Adnan (Partai
Golkar), Agus Soeyitno-Kholiq Arif (PKB), Sukawi Sutarip-Sudharto (Partai
Demokrat-PKS), Bibit Waluyo-Rustriningsih (PDI-P) dan HM. Tamzil-Rozaq
Rais (PPP-PAN). Mekanisme pemilihan langsung berakibat jarak antara pasangan
calon dengan pemilih menjadi semakin dekat sehingga setiap pasangan calon
dituntut untuk memanfaatkan media dalam membangun citra positif. Dalam hal
ini peran media sebagai sarana komunikasi politik menjadi cukup vital. Bagi
pasangan calon, media adalah sarana strategis untuk menyebarluaskan pesan
politik kepada khalayak. Media sebagai salah satu sumber informasi bagi
masyarakat harus mampu menjalankan fungsinya dengan baik dengan berpegang
pada netralitas. Namun, dalam operasionalnya media selalu dipengaruhi faktor
internal dan eksternal yang membuat mereka tidak dapat sepenuhnya objektif.
Media bukanlah institusi yang bebas nilai. Isi media tidaklah merefleksikan
realitas yang ada namun mengkonstruksikan serangkaian fakta yang terjadi.
Metode triangulasi digunakan untuk mengetahui bagaimana harian Jawa
Pos Radar Semarang dan Suara Merdeka mengkonstruksikan masing-masing
pasangan calon. Juga untuk mengetahui kecenderungan pemberitaan serta politik
redaksional masing-masing media. Objek penelitian yang dipilih adalah beritaberita
tentang pasangan calon di harian Jawa Pos Radar Semarang dan Suara
Merdeka pada halaman satu dan rubrik khusus selama 26 Maret-22 Juni 2008.
Hasil penelitian menunjukkan bahwa harian Jawa Pos Radar Semarang
berusaha responsif dengan isu-isu politik memberikan konstruksi yang favorable
kepada pasangan Agus Soeyitno-Kholiq Arif, Bibit Waluyo-Rustriningsih dan
HM. Tamzil-Rozaq Rais. Sebaliknya, mereka memberikan konstruksi
unfavorable kepada pasangan Bambang Sadono-M. Adnan dan Sukawi Sutarip-
Sudharto. Sedangkan Suara Merdeka memilih gaya pemberitaan yang aman dan
tidak tendesius kepada masing-masing pasangan calon. Hasilnya, mereka
cenderung mengkonstruksikan pasangan Bambang Sadono-M. Adnan, Bibit
Waluyo-Rustriningsih dan HM. Tamzil-Rozaq Rais dengan bingkai yang
favorable. Sedangkan pasangan Agus Soeyitno-Kholiq Arif dan Sukawi Sutarip-
Sudharto dalam bingkai unfavorable.
Pilgub Jateng 2008 adalah pemilihan kepala daerah langsung pertama yang
terjadi di Jawa Tengah. Ada lima pasangan yang mencalonkan diri sebagai
gubernur-wakil gubernur. Mereka adalah Bambang Sadono-M. Adnan (Partai
Golkar), Agus Soeyitno-Kholiq Arif (PKB), Sukawi Sutarip-Sudharto (Partai
Demokrat-PKS), Bibit Waluyo-Rustriningsih (PDI-P) dan HM. Tamzil-Rozaq
Rais (PPP-PAN). Mekanisme pemilihan langsung berakibat jarak antara pasangan
calon dengan pemilih menjadi semakin dekat sehingga setiap pasangan calon
dituntut untuk memanfaatkan media dalam membangun citra positif. Dalam hal
ini peran media sebagai sarana komunikasi politik menjadi cukup vital. Bagi
pasangan calon, media adalah sarana strategis untuk menyebarluaskan pesan
politik kepada khalayak. Media sebagai salah satu sumber informasi bagi
masyarakat harus mampu menjalankan fungsinya dengan baik dengan berpegang
pada netralitas. Namun, dalam operasionalnya media selalu dipengaruhi faktor
internal dan eksternal yang membuat mereka tidak dapat sepenuhnya objektif.
Media bukanlah institusi yang bebas nilai. Isi media tidaklah merefleksikan
realitas yang ada namun mengkonstruksikan serangkaian fakta yang terjadi.
Metode triangulasi digunakan untuk mengetahui bagaimana harian Jawa
Pos Radar Semarang dan Suara Merdeka mengkonstruksikan masing-masing
pasangan calon. Juga untuk mengetahui kecenderungan pemberitaan serta politik
redaksional masing-masing media. Objek penelitian yang dipilih adalah beritaberita
tentang pasangan calon di harian Jawa Pos Radar Semarang dan Suara
Merdeka pada halaman satu dan rubrik khusus selama 26 Maret-22 Juni 2008.
Hasil penelitian menunjukkan bahwa harian Jawa Pos Radar Semarang
berusaha responsif dengan isu-isu politik memberikan konstruksi yang favorable
kepada pasangan Agus Soeyitno-Kholiq Arif, Bibit Waluyo-Rustriningsih dan
HM. Tamzil-Rozaq Rais. Sebaliknya, mereka memberikan konstruksi
unfavorable kepada pasangan Bambang Sadono-M. Adnan dan Sukawi Sutarip-
Sudharto. Sedangkan Suara Merdeka memilih gaya pemberitaan yang aman dan
tidak tendesius kepada masing-masing pasangan calon. Hasilnya, mereka
cenderung mengkonstruksikan pasangan Bambang Sadono-M. Adnan, Bibit
Waluyo-Rustriningsih dan HM. Tamzil-Rozaq Rais dengan bingkai yang
favorable. Sedangkan pasangan Agus Soeyitno-Kholiq Arif dan Sukawi Sutarip-
Sudharto dalam bingkai unfavorable
Peculiarities of Defective Formations in Heterophase Regions of the Thermotropic Phase Transitions in Liquid Crystals
No full textWOS: 000467977500005A unique feature of phase transitions in liquid crystalline materials is the availability of heterophase regions. In such regions, the simultaneous coexistence of high temperature and low temperature phases takes place. Thermal mobility and temperature gradient in the heterophase regions lead to the appearance of various types of defective formations in the aligned and non-aligned textures of liquid crystalline materials. In the present work, the morphologic, structural, and optical peculiarities of defective formations and non-homogeneities, which appear in the heterophase regions of phase transitions, are investigated. The singular points, disclination, inversion walls, droplets, and confocal formations are objects of the investigations herein. The heterophase regions of the direct and reverse nematic isotropic liquid and smectic A isotropic liquid, smectic C isotropic liquid, and smectic C* isotropic liquid thermotropic phase transitions are created by the original method, that is, the capillary temperature wedge method. Crystallo-optics and crystallo-physics methods are used in this work.Research Foundation of Mugla Sitki Kocman UniversityMugla Sitki Kocman University [15/124]Author is thankful to Prof. Belkis Bilgin-Eran for OHMP and OMPMP liquid crystals. This work has been partially supported by the Research Foundation of Mugla Sitki Kocman University, Grant No. 15/124
Electronic Braille Document Reader
No full textThis paper presents an investigation into developing a portable Braille device which would allow visually impaired individuals to read electronic documents by actuating Braille text on a finger. Braille books tend to be bulky in size due to the minimum size requirements for each Braille cell. E-books can be read in Braille using refreshable Braille displays connected to a computer. However, the refreshable Braille displays are expensive, bulky and are not portable. These factors restrict blind and visually impaired individuals from accessing much of the literature which is not available in Braille.
The proposed device overcomes the problem of carrying bulky Braille books by allowing multiple E-books to be saved in a portable memory device. Translating text to Braille pattern gives the blind access to non-Braille literature. The single Braille cell design reduces the bulk of the device allowing it to be portable and reducing the cost.
A prototype was developed to prove Braille could be read by actuating Braille characters on a finger. The device read text from an SD card, translated it into Braille characters and actuated the Braille pattern which blind volunteers were able to read.
The investigation confirmed the feasibility of the Electronic Braille document reader. It also proved the theory that Braille could be read from a single Braille cell by the patterns actuating on a finger instead of the finger sliding across an already formed Braille pattern
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Unsupervised shape clustering using diffusion map
No full textThe quotient space of all smooth and connected curves represented by a fixed number of boundary points is a finite-dimensional Riemannian manifold, also known as a shape manifold. This makes the preservation of locality a critically important issue when reducing the dimensionality of shapes on the manifold. We present a completely unsupervised clustering algorithm employing diffusion maps for locality-preserving embedding of shapes onto a much lower-dimensional space. The algorithm first obtains a non-linear low-dimensional embedding of shape context features of outer boundary contours of the shapes. Considering the embedded coordinates as a new minimalist representation of shapes, a clustering of shapes is obtained using a finite mixture model. The proposed clustering algorithm is computationally efficient, as it relies on clustering in a very lowdimensional space, and produces much improved results (88.6% for a 7-class dataset) as compared to clustering with conventional linear projections
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