Quantum Phases of Ultracold Bosonic Atoms in a One Dimensional Optical Superlattice

We analyze various quantum phases of ultracold bosonic atoms in a periodic one dimensional optical superlattice. Our studies have been performed using the finite size density matrix renormalization group (FS-DMRG) method in the framework of the Bose-Hubbard model. Calculations have been carried out for a wide range of densities and the energy shifts due to the superlattice potential. At commensurate fillings, we find the Mott insulator and the superfluid phases as well as Mott insulators induced by the superlattice. At a particular incommensurate density, the system is found to be in the superfluid phase coexisting with density oscillations for a certain range of parameters of the system.Comment: 7 pages, 11 figure

Paradigma Pendidikan Seni di Era Globalisasi Berbasis Wacana

The paradigm of the arts education in the future must be able to apply various approaches where learners can cultivate their views and tolerant attitude towards the cultural diversity in Indonesia. The arts education is expected to be a compulsory course in universities so that the students have sensitive, aesthetic, creative and innovative attitude as well as adaptive character to any change and good ethics in expressing their creativities. It is not just an education generated only for the sake of art competition but must become a daily necessity. In facing the globalization phenomenon, the arts education is made to utilize multicultural approach which can be accepted by various circles of society. The arts educa- tion with a multicultural approach should have flexibility and rely on the ability of the learners and the socio-cultural conditions of the local society. The role of the arts educators is expected to not only pos- sess the local artistic knowledge, but also the knowledge about other regional arts so that in this way the students obtain complete knowledge of arts and culture as well as fostering the sense of tolerance with the diversity

Hardcore bosons in a zig-zag optical superlattice

We study a system of hard-core bosons at half-filling in a one-dimensional optical superlattice. The bosons are allowed to hop to nearest and next-nearest neighbor sites producing a zig-zag geometry and we obtain the ground state phase diagram as a function of microscopic parameters using the finite-size density matrix renormalization group (FS-DMRG) method. Depending on the sign of the next-nearest neighbor hopping and the strength of the superlattice potential the system exhibits three different phases, namely the bond-order (BO) solid, the superlattice induced Mott insulator (SLMI) and the superfluid (SF) phase. When the signs of both hopping amplitudes are the same (the "unfrustrated" case), the system undergoes a transition from the SF to the SLMI at a non-zero value of the superlattice potential. On the other hand, when the two amplitudes differ in sign (the "frustrated" case), the SF is unstable to switching on a superlattice potential and also exists only up to a finite value of the next nearest neighbor hopping. This part of the phase diagram is dominated by the BO phase which breaks translation symmetry spontaneously even in the absence of the superlattice potential and can thus be characterized by a bond order parameter. The transition from BO to SLMI appears to be first order.Comment: 6 pages, 11 figure

Mean field analysis of quantum phase transitions in a periodic optical superlattice

In this paper we analyze the various phases exhibited by a system of ultracold bosons in a periodic optical superlattice using the mean field decoupling approximation. We investigate for a wide range of commensurate and incommensurate densities. We find the gapless superfluid phase, the gapped Mott insulator phase, and gapped insulator phases with distinct density wave orders.Comment: 6 pages, 7 figures, 4 table

Life and (non)Living: Technological and Human Conglomeration in Android Kunjappan Version 5.25

In post-modern society, we (humans) share our space with machines. Though there is no doubt in the efficiency of the machines there is always a doubt in their reason. Machines being programmed cannot exercise reason like humans. Their assistance is limited to the commands designed by the engineer. The Malayalam movie Android Kunjappan Version 5.25 pictures the limitations and advantages of one such robotic creation. The movie narrates the tale of an old man and his association with a robot which becomes his solace and companion. The film questions the association between humans and machines. It raises the fear of constructing and destroying the boundaries between the machine world and the human world. This article attempts to use the concept of cyborg introduced by Donna Haraway in ‘Cyborg Manifesto’; though Haraway uses the concept of a cyborg from a Feminist perspective, the paper attempts to look at the relationship between man and machine using the concept ‘cyborg’. This fusion of the living and non-living is sceptical and this anxiety is presented in the film. The film also captured the naivety of the commoners who are new to the monstrous world of machines. The paper’s primary aim is to list how cyborgs transgress the limitations set by society. Another objective is to discuss the anxieties of the post-modern world when technology and life hold hands. The article considers the film a futuristic art that leaves a message to the viewers; cyborgs will become an inevitable facet of the human world

Struktur Nafkah Rumahtangga Petani Transmigran : Studi Sosio-Ekonomi di Tiga Kampung di Distrik Masni Kabupaten Manokwari

Among the primary objectives of transmigration program are to increase the economic status of transmigrant farm-households and enhancing rural infrastructures of the local region. To see wether such objective is attainable, a study of transmigrant farm households has been conducted in West Papua. The study attempts: (1) to know whether there is any relation between the socio-cultural/ethnical background of the transmigrant farm-household with the achievement of welfare status, (2) to analyze factors influencing to the income level of transmigrant farm-households, and (3) to understand how the farm households enhance the degree of economic status by building numerous livelihood strategies. The methods as used in the analysis are: (1) income level analysis of the households, (2) gini-ratio analysis, and (3) descriptive analysis. The results of this study are: socio-cultural (ethnical) setting of transmigrant has a substantial influence to the achievement of welfare level. Javanese transmigrant showed a much higher income achievement due to their strong engagement in the non-farm economy, as compared to Papuanese transmigrant farm-households. The non-farm economy provides a strong basis for economic growth at household level. However, the growth of non-farm economy unexpectedly caused an increasing tendency of income disparity among different farm household strata. Since non-farm economy shares a positive contribution for regional economic growth, the study concludes, that the government needs to take seriously this economic sector into account when regional development needs to be well-accomplished in West Papua

Fetus-in-fetu: A Rare Congenital Anomaly

Two cases of fetus-in-fetu, on which we performed surgery in 2003 and 2006, are being reported. Both the cases presented with a lump in the abdomen. Radiology confirmed the diagnosis. The lumps were found in the retroperitoneum and successfully excised. Because of the rarity of the condition, these two cases are being reported with relevant salient features and are discussed in the light of available literature. Key words: Abdominal lump, axial skeleton, fetus-in-fetu, retroperitoneal, teratom

Socio-Economic Impacts by the Internet Usage of Teenagers in Villages

The study was done in two village, they are Cibatok I Village and Pangradin Village, The Bogor District of West Java, Indonesia.The purposes of this study were 1) to analyse and determine the impacts of the use of internet in teenagers characteristics to internet USAge pattern in two villages 2) to analyze the socio-economic impact brought by internet USAge pattern of teenagers in two villages.This study was approached by using quantitative method supported by qualitative method. Data obtained through observation, depth interviews and interviews using questionnaires. Meanwhile, the results of this study showed 1) The differences of internet USAge pattern in the two villages 2) The availability of internet access in Cibatok I Village have made impacts to the socio-economic changes of teenagers life. Meanwhile, it is not clearly seen in teenagers live at Pangradin Villag