3,321 research outputs found
Make it so! Jean-Luc Picard, Bart Simpson and the design of e-public services
In this paper, we report on a project applying participatory design methods to include people who have experience of social exclusion (in one form or another) in designing possible technologies for e-(local)-government services. The work was part of a project for the Office of the Deputy Prime Minister in the UK, and was concerned with ‘access
tokens’ that can provide personal identification for individuals accessing public services, based on technologies such as multi-functional smartcards, flash memory sticks, mobile phone SIMs or similar devices.
In particular we report on our experience using the ‘pastiche scenarios’ technique recently developed by Mark Blythe. Our findings indicate that the technique can be effective and engaging in helping people to create realistic scenarios of future technology use and highlight some possible pitfalls to consider when using this technique.</p
Observation of a dissipative phase transition in a one-dimensional circuit QED lattice
Condensed matter physics has been driven forward by significant experimental
and theoretical progress in the study and understanding of equilibrium phase
transitions based on symmetry and topology. However, nonequilibrium phase
transitions have remained a challenge, in part due to their complexity in
theoretical descriptions and the additional experimental difficulties in
systematically controlling systems out of equilibrium. Here, we study a
one-dimensional chain of 72 microwave cavities, each coupled to a
superconducting qubit, and coherently drive the system into a nonequilibrium
steady state. We find experimental evidence for a dissipative phase transition
in the system in which the steady state changes dramatically as the mean photon
number is increased. Near the boundary between the two observed phases, the
system demonstrates bistability, with characteristic switching times as long as
60 ms -- far longer than any of the intrinsic rates known for the system. This
experiment demonstrates the power of circuit QED systems for studying
nonequilibrium condensed matter physics and paves the way for future
experiments exploring nonequilbrium physics with many-body quantum optics
Chiral Transition of N=4 Super Yang-Mills with Flavor on a 3-Sphere
We use the AdS/CFT correspondence to perform a numerical study of a phase
transition in strongly-coupled large-Nc N = 4 Super-Yang-Mills theory on a
3-sphere coupled to a finite number Nf of massive N = 2 hypermultiplets in the
fundamental representation of the gauge group. The gravity dual system is a
number Nf of probe D7-branes embedded in AdS_5 x S^5. We draw the phase diagram
for this theory in the plane of hypermultiplet mass versus temperature and
identify for temperatures above the Hawking-Page deconfinement temperature a
first-order phase transition line across which the chiral condensate jumps
discontinuously.Comment: 23 pages, 15 figures, minor corrections, reference added, nine
figures improved, no change in results or conclusions; expanded discussion of
fixing finite counterterms in section 3.3, figures updated, no changes to
conclusion
Supersolid phases of light in extended Jaynes-Cummings-Hubbard systems
Jaynes-Cummings-Hubbard lattices provide unique properties for the study of
correlated phases as they exhibit convenient state preparation and measurement,
as well as "in situ" tuning of parameters. We show how to realize charge
density and supersolid phases in Jaynes-Cummings-Hubbard lattices in the
presence of long-range interactions. The long-range interactions are realized
by the consideration of Rydberg states in coupled atom-cavity systems and the
introduction of additional capacitive couplings in quantum-electrodynamics
circuits. We demonstrate the emergence of supersolid and checkerboard solid
phases, for calculations which take into account nearest neighbour couplings,
through a mean-field decoupling.Comment: 9 pages with 6 figures, accepted for publication in Physical Review
The size of the X-ray emitting region in SWIFT J2127.4+5654 via a broad line region cloud X-ray eclipse
We present results obtained from the time-resolved X-ray spectral analysis of
the Narrow-Line-Seyfert 1 galaxy SWIFT J2127.4+5654 during a ~130 ks XMM-Newton
observation. We reveal large spectral variations, especially during the first
~90 ks of the XMM-Newton exposure. The spectral variability can be attributed
to a partial eclipse of the X-ray source by an intervening low-ionization/cold
absorbing structure (cloud) with column density N_H = 2.0^{+0.2}_{-0.3}e22
cm^-2 which gradually covers and then uncovers the X-ray emitting region with
covering fraction ranging from zero to ~43 per cent. Our analysis enables us to
constrain the size, number density, and location of the absorbing cloud with
good accuracy. We infer a cloud size (diameter) of $D_c < 1.5e13 cm,
corresponding to a density of n_c > 1.5e9 cm^-3 at a distance of R_c > 4.3e16
cm from the central black hole. All of the inferred quantities concur to
identify the absorbing structure with one single cloud associated with the
broad line region of SWIFT J2127.4+5654. We are also able to constrain the
X-ray emitting region size (diameter) to be D_s < 2.3e13 cm which, assuming the
black hole mass estimated from single-epoch optical spectroscopy (1.5e7 M_sun),
translates into D_s < 10.5 gravitational radii (r_g) with larger sizes (in r_g)
being associated with smaller black hole masses, and viceversa. We also confirm
the presence of a relativistically distorted reflection component off the inner
accretion disc giving rise to a broad relativistic Fe K emission line and small
soft excess (small because of the high Galactic column density), supporting the
measurement of an intermediate black hole spin in SWIFT J2127.4+5654 that was
obtained from a previous Suzaku observation.Comment: 8 pages, 7 figures, accepted for publication in MNRA
Perancangan Company Profle Perusahaan Pengolah Kelapa UD. Kelapa Terpadu
UD. Kelapa Terpadu adalah Perusahaan pengolah kelapa yang berada di Luwuk, Sulawesi Tengah, Indonesia. Perusahaan ini tergolong Perusahaan baru, masih banyak orang belum mengenal dan mengetahui Perusahaan tersebut. Oleh karena itu dibutuhkan perancangan company profile untuk menunjukkan kualitas dan profesionalitas Perusahaan beserta dengan produk – produknya kepada target audience. Serta mengembangkan desain corporate identity untuk mendukung perancangan company profile tersebut
Upaya Meningkatkan Kemampuan Memahami Bacaan Bahasa Jepang Tingkat Dasar Melalui Model Pembelajaran Cooperative Learning Teknik Script (Penelitian Tindakan Kelas Pada Mahasiswa Semester II Prodi Pendidikan Bahasa Jepang Unnes)
The purpose of this classroom action research is to improve the quality of teaching and learning process for Dokkai Shokyu Kohan (basic level of reading comprehension) which was held at the Japanese Language Education Program, Semarang State University. This is because in the course there is the unequal distribution of activity and participation of students in following the learning process. To overcome these problems, the application of Script Cooperative Learning Techniques in Dokkai Shokyu Kohan's course regarded as the right solution. The application of this model of learning is more motivating the lecturer and students to interact actively in Dokkai Shokyu Kohan learning process. After going through two cycles, the positive results of the application this Technique Script is starting to look. The positive result is the improvement of the role of teachers and increasing the student activity and participation in lectures. In addition, the average value of student learning outcomes also increased
Produktivitas Sapi Jawa yang Diberi Pakan Basal Jerami Padi dengan Berbagai Level Konsentrat
This research was conducted to evaluate the productivity of Jawa cattle which was fattened using rice straw with various levels of concentrate. Twelve heads of Jabres bulls, two years old, with the initial body weight of 270,6 ± 38,03 kg (CV=14,06%) were used in this experiment. Those Jabres bulls were fed rice straw ad libitum and different level of concentrate that consisted of rice bran, copra meal, beer waste product, and minerals. Completely Randomized Block Design with 3 treatments and 4 blocks of different body weights were used in this study. The treatments were T1= 30% concentrate of the total DM requirements, T2= 50% concentrate of the total DM requirements, T3 = 70% concentrate of the total DM requirements. The collected data were dry matter intake (DMI), protein and total digestible nutrients (TDN) intake, dry matter digestibility, the average daily gain (ADG), and feed conversion ratio (FCR). The results showed that different level of concentrate did not influence the DMI, CP and TDN intake, and also dry matter digestibility (P>0.05). The average of DMI, CP, and TDN intake were 5.69 kg, 0.78 kg, and 3,95 kg/head/day respectively. The average of dry matter digestibility was 52.94%. The ADG was 0.53 kg and FCR was 12.80. The conclusion of this research was that the productivity of Jabres cattle fattened using rice straw and 30-70% concentrate were relatively the same
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