The electronic properties of doped single walled carbon nanotubes and carbon nanotube sensors

We present ab initio calculations on the band structure and density of states of single wall semiconducting carbon nanotubes with high degrees (up to 25%) of B, Si and N substitution. The doping process consists of two phases: different carbon nanotubes (CNTs) for a constant doping rate and different doping rates for the zigzag (8, 0) carbon nanotube. We analyze the doping dependence of nanotubes on the doping rate and the nanotube type. Using these results, we select the zigzag (8, 0) carbon nanotube for toxic gas sensor calculation and obtain the total and partial densities of states for CNT (8, 0). We have demonstrated that the CNT (8, 0) can be used as toxic gas sensors for CO and NO molecules, and it can partially detect Cl$_2$ toxic molecules but cannot detect H$_2$S. To overcome these restrictions, we created the B and N doped CNT (8, 0) and obtained the total and partial density of states for these structures. We also showed that B and N doped CNT (8, 0) can be used as toxic gas sensors for such molecules as CO, NO, Cl$_2$ and H$_2$S.Comment: 12 pages, 13 figure

Analisis Dampak Target the Fed Rate Terhadap Kebijakan Moneter Bank Indonesia (Periode 2005: 07-2013:12)

Kebijakan suku bunga merupakan instrumen yang telah banyakdigunakan oleh bank-bank sentral di dunia untuk mencerminkan arah kebijakan moneter. Tujuan penelitian ini adalah untuk menganalisis dampak dari Fed target rate kebijakan moneter Bank Indonesia (BI rate) melalui saluran transmisi keuangan selama periode 2005: 07-2013: 12. Metode yang digunakan dalam penelitian ini adalah Vector Error Correction Model (VECM). Variabel yang digunakan meliputi BI rate, tingkat sasaran Fed, arus modal (proksi Investment Portfolio Asing), premi risiko (proksi oleh tingkat suku bunga antar bank overnight) dan kurs tengah IRD / USD. Hasil penelitian ini menunjukkan bahwa:1) tidak ada kausalitas antara variabel dalam transmising dampak Fed tarif targetkebijakan moneter Bank Indonesia (BI tarif); 2) The Fed tarif sasaran, arus modal, nilai tukar rupiah / USD dan premi risiko mempengaruhi tingkat BI; 3) pergerakan harga sasaran Fed ditransmisikan melalui sektor keuangan telah direspon secara positif oleh tingkat BI, dan 4) dampak tarif sasaran Fed ditularkan melalui sektor keuangan untuk dinamika suku bunga BI sebagian besar dijelaskan oleh target Fed rate, BI rate, dan nilai tukar rupiah / USD

THE WORKS OF CAFER AÇIN IN TURKISH ORGANOLOGY

Cafer Açın was born in Ankara in 1939, as stated in his autobiography . He began his main education in 1950, registering at the Department of Instrument Manufacturing for Secondary and High School Students at the Ankara Technical Teacher Training College, and then studied at the Ankara State Conservatory, where his department was transferred in 1957. According to his autobiography, he wrote poems, painted and composed about 30 songs. He often mentioned his teacher, Mithat Arman, in his works, a man who contributed greatly to both his education and personality. In this article, the works of Cafer Açın have been examined

Quantum erasure with causally disconnected choice

The counterintuitive features of quantum physics challenge many common-sense assumptions. In an interferometric quantum eraser experiment, one can actively choose whether or not to erase which-path information, a particle feature, of one quantum system and thus observe its wave feature via interference or not by performing a suitable measurement on a distant quantum system entangled with it. In all experiments performed to date, this choice took place either in the past or, in some delayed-choice arrangements, in the future of the interference. Thus in principle, physical communications between choice and interference were not excluded. Here we report a quantum eraser experiment, in which by enforcing Einstein locality no such communication is possible. This is achieved by independent active choices, which are space-like separated from the interference. Our setup employs hybrid path-polarization entangled photon pairs which are distributed over an optical fiber link of 55 m in one experiment, or over a free-space link of 144 km in another. No naive realistic picture is compatible with our results because whether a quantum could be seen as showing particle- or wave-like behavior would depend on a causally disconnected choice. It is therefore suggestive to abandon such pictures altogether

A high-speed tunable beam splitter for feed-forward photonic quantum information processing

We realize quantum gates for path qubits with a high-speed, polarization-independent and tunable beam splitter. Two electro-optical modulators act in a Mach-Zehnder interferometer as high-speed phase shifters and rapidly tune its splitting ratio. We test its performance with heralded single photons, observing a polarization-independent interference contrast above 95%. The switching time is about 5.6 ns, and a maximal repetition rate is 2.5 MHz. We demonstrate tunable feed-forward operations of a single-qubit gate of path-encoded qubits and a two-qubit gate via measurement-induced interaction between two photons

The Peptidoglycan-Binding Protein SjcF1 Influences Septal Junction Function and Channel Formation in the Filamentous Cyanobacterium Anabaena

Filamentous, heterocyst-forming cyanobacteria exchange nutrients and regulators between cells for diazotrophic growth. Two alternative modes of exchange have been discussed involving transport either through the periplasm or through septal junctions linking adjacent cells. Septal junctions and channels in the septal peptidoglycan are likely filled with septal junction complexes. While possible proteinaceous factors involved in septal junction formation, SepJ (FraG), FraC, and FraD, have been identified, little is known about peptidoglycan channel formation and septal junction complex anchoring to the peptidoglycan. We describe a factor, SjcF1, involved in regulation of septal junction channel formation in the heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120. SjcF1 interacts with the peptidoglycan layer through two peptidoglycan-binding domains and is localized throughout the cell periphery but at higher levels in the intercellular septa. A strain with an insertion in sjcF1 was not affected in peptidoglycan synthesis but showed an altered morphology of the septal peptidoglycan channels, which were significantly wider in the mutant than in the wild type. The mutant was impaired in intercellular exchange of a fluorescent probe to a similar extent as a sepJ deletion mutant. SjcF1 additionally bears an SH3 domain for protein-protein interactions. SH3 binding domains were identified in SepJ and FraC, and evidence for interaction of SjcF1 with both SepJ and FraC was obtained. SjcF1 represents a novel protein involved in structuring the peptidoglycan layer, which links peptidoglycan channel formation to septal junction complex function in multicellular cyanobacteria. Nonetheless, based on its subcellular distribution, this might not be the only function of SjcF1.Peer reviewe

Postcolonial international relations theory: The concept of "hybridity"

Yüksek Lisans TeziPostkolonyal Uluslararası İlişkiler teorisi kolonyalizmi siyasi, askeri ekonomik, kültürel, kimliksel ve zihinsel bir baskı süreci olarak kabul eder. Postkolonyal Uluslararası İlişkiler teorisi her ne kadar 1980'li yıllarda ortaya çıkmış ve 1990'lı yıllarda gelişmeye başlamış gibi görünse de kökenleri 15. yy sömürge tarihine kadar uzanır. Bu teori dünya tarihini ve Üçüncü Dünya ülkelerinin durumunu ana akım Uluslararası İlişkiler teorilerine eleştirel yaklaşarak ve melezlik gibi farklı kavramları da kullanarak açıklar. Postkolonyal teoriye göre melezlik; bir zamanlar kolonize edilmiş yerli halkın kültürünün Batı kültürünün yanında halen belirsiz bir şekilde var olduğunu gösterir. Melezlik kavramı günümüze dek çok farklı anlamlarda kullanılmıştır. 18. yy. başlarında, kolonyal dönemlerde, melezlik kavramı biyolojik bir anlam içeriyordu ve beyaz ırkın ırkçılık üstünlüğü tavrını haklı çıkarmak ve ırklar arası üremeyi önlemek için "ırkların karışması" ve "kültür birleşimi" anlamı taşıyordu. 19 yy. başlarından sonra, dekolonizasyon dönemiyle birlikte, melezlik kavramı özellikle ABD'de İspanyol asıllı kişiler arasında, yerli ile İspanyol asıllıları birbirinden ayırmak için kullanılarak yeni bir anlam kazandı. Daha sonra ise; 20. yüzyılda, Post-kolonyal ve globalleşme dönemlerinde, melezlik kavramı çoğunluk içerisinde yer alan madun azınlığın uğradığı sosyal ayrımcılığı kastetti. Bu çalışma, Postkolonyal Uluslararası İlişkiler teorisinin günümüze dek tarihsel sürecini ve melezlik kavramının zaman içindeki yeni anlamlarını ele alarak kolonici ve kolonize ülkelerin uluslararası ilişkiler, siyasi, askeri, ekonomik, kültürel, zihinsel ve kimliksel durumunu anlamlandırmayı amaçlar.According to the Postcolonial International Relations theory; colonialism is a political, military, economical, cultural, identity and mental period of domination. Although Postcolonial International Relations theory was born in 1980s and started to develop in the 1990s, it's roots go back to the 15th century of colonization. This theory explains world history and Third World states' situation by criticizing the mainstream International Relations theories and using different concepts like the concept of hybridity. Postcolonial International Relations theory claims the concept of hybridity symbolizes the presence of the colonized Indigenous culture next to the Western culture vaguely. The concept of hybridity of Postcolonial International Relations theory had a long journey in time till today. Early in the 18th century, during the colonial period, hybridity had a biological meaning of "miscegenation" and "amalgamation" in order to justify the white racial superiority and prohibit the interracial breeding. After the beginning of the 19th century, with the decolonization period, hybridity had gained new meanings especially in the USA between the people from Spanish descendants, as it was used to differentiate between the Indegenous origins and Spanish origins. Later with the 20th century, with the postcolonial era and the globalization period, hybridity referred to social discrimination of once colonized minority people in the majority. This study aims to make sense of Postcolonial International Relations theory's historical journey till today and various meanings of the concept of hybridity in time, via lightening the international relations, political, economical, cultural, mental and identity situations of colonizing and colonized states' situations

Linked spaces and exit paths

Given a span of $\infty$-categories one of whose legs is a right fibration and the other a cofibration, we construct an $\infty$-category, the exit path $\infty$-category of the span. This gives access to stratified geometry by means only of unstratified objects.Comment: v2: generalised main resul

Towards Linked Topology

We introduce the notions of linked space, linked quasi-category and linked manifold, which are certain spans of the ordinary versions of the respective objects, and which model stratified spaces of various kinds. We then transfer, in depth 1, certain phenomena and constructions from stratified topology to this setting, such as exit path quasi-categories and the beginnings of a stratified bundle theory. We then discuss and extend the topology underlying a construction of J. Lurie, which associates a functorial field theory to any framed disk algebra, to arbitrary tangential structure, as well as an incorporation of defects which is native to the linked setting