Nonfactorization in Hadronic Two-body Cabibbo-favored decays of D^0 and D^+

With the inclusion of nonfactorized amplitudes in a scheme with $N_c=3$, we have studied Cabibbo-favored decays of $D^0$ and $D^+$ into two-body hadronic states involving two isospins in the final state. We have shown that it is possible to understand the measured branching ratios and determined the sizes and signs of nonfactorized amplitudes required.Comment: 15 pages, Late

Discovery and Identification of W' Bosons at e+e- Colliders

We report on studies of the sensitivity to extra gauge bosons of the reactions e^+ e^- -> nu nubar gamma and e gamma -> nu q + X to extract discovery limits for W' 's. The discovery potential for a W' is, for some models, comparable to that of the LHC. These processes may be also useful for determining W' and Z' couplings to fermions which would complement measurements made at the Large Hadron Collider.Comment: 3 pages, 2 postscript figures, Presented at the DPF2000 Conference, August 9-12, 2000, The Ohio State University, Columbus, Ohi

Pengaruh Leverage, Subsidiaries dan Audit Complexityterhadap Audit Delay (Studi Empiris pada Perusahaan Manufaktur di Bursa Efek Indonesia)

Audit delay is an audit solving duration which measured from the date of book year closing to the date of audit report issued. A high quality of financial statement audit could decrease investor and creditor risk in making an investment decision. The advantages of financial statement would decrease if the report isn't available on time.This research examines the factors influence audit delay. They are leverage, subsidiaries and audit complexity. This research samples take all manufacturing companies are listed in Indonesia Stock Exchange, amount 32 companies that chose based on purposive sampling method by 160 observations. They have undertaken for 5 years from 2004 – 2008.Firstly, data is examined by classical normal linear regresion model (CNLRM) which consist normality, multicollinearity and heteroscedasticity tests. Secondly, it is examined by multiple linear regression using hypothesis to know about the factors have an influencing to audit delay.The result of this research shows that simultaneously, it proves that leverage, subsidiaries and audit complexity have a significant influencing to audit delay at manufacturing companies listed in Indonesia Stock Exchange. Partially, just leverage has a significant influencing to audit delay. Whereas subsidiaries and audit complexity don't have a significant influencing to audit delay at manufacturing companies listed in Indonesia Stock Exchange

Nonfactorization and Color-Suppressed B→ψ(ψ(2S))+K(K∗)B \to \psi (\psi(2S))+K(K^*) Decays

Using $N_c=3$ value of the parameter $a_2=0.09$ but including a modest nonfactorized amplitude, we show that it is possible to understand all data, including polarization, for color-suppressed $B\to\psi(\psi(2S))+K(K^*)$ decays in all commonly used models of form factors. We show that for $B\to\psi +K$ decay one can define an effective $a_2$, which is process-dependent and, in general, complex; but it is not possible to define an effective $a_2$ for $B\to\psi +K^*$ decay. We also explain why nonfactorized amplitudes do not play a significant role in color-favored B decays.Comment: 13 pages, Latex, one figure (not included

A Doorway Detection and Direction (3Ds) System for Social Robots via a Monocular Camera

In this paper, we propose a novel algorithm to detect a door and its orientation in indoor settings from the view of a social robot equipped with only a monocular camera. The challenge is to achieve this goal with only a 2D image from a monocular camera. The proposed system is designed through the integration of several modules, each of which serves a special purpose. The detection of the door is addressed by training a convolutional neural network (CNN) model on a new dataset for Social Robot Indoor Navigation (SRIN). The direction of the door (from the robot’s observation) is achieved by three other modules: Depth module, Pixel-Selection module, and Pixel2Angle module, respectively. We include simulation results and real-time experiments to demonstrate the performance of the algorithm. The outcome of this study could be beneficial in any robotic navigation system for indoor environments

Nonfactorization and the decays Ds+→ϕπ+,ϕρ+D_s^+ \to \phi \pi^+, \phi \rho^+ and ϕl+νl\phi l^+ \nu_l

In six chosen scenarios for the $q^2$ dependence of the form factors involved in $D_s^+ \rightarrow \phi$ transition, we have determined the allowed domain of $x = A_2(0) / A_1(0)$ and $y = V(0)/A_1(0)$ from the experimentally measured ratios $R_{sl} = \Gamma(D_s^+ \rightarrow \phi l^+ \nu_l)/\Gamma(D_s^+ \rightarrow \phi \pi^+)$ and $R_h = \Gamma(D_s^+ \rightarrow \phi \rho^+)/\Gamma(D_s^+ \rightarrow \phi \pi^+)$ in a scheme that uses the $N_c =3$ value of the phenomenological parameter $a_1$ and includes nonfactorized contribution. We find that the experimentally measured values of $x$ and $y$ from semileptonic decays of $D_s^+$ favor solutions which have significant nonfactorized contribution, and, in particular, $R_{sl}$ favors solutions in scenarios where $A_1(q^2)$ is either flat or decreasing with $q^2$.Comment: 15 pages, Latex, four figure (available on request)

Non-degenerate, three-wave mixing with the Josephson ring modulator

The Josephson ring modulator (JRM) is a device, based on Josephson tunnel junctions, capable of performing non-degenerate mixing in the microwave regime without losses. The generic scattering matrix of the device is calculated by solving coupled quantum Langevin equations. Its form shows that the device can achieve quantum-limited noise performance both as an amplifier and a mixer. Fundamental limitations on simultaneous optimization of performance metrics like gain, bandwidth and dynamic range (including the effect of pump depletion) are discussed. We also present three possible integrations of the JRM as the active medium in a different electromagnetic environment. The resulting circuits, named Josephson parametric converters (JPC), are discussed in detail, and experimental data on their dynamic range are found to be in good agreement with theoretical predictions. We also discuss future prospects and requisite optimization of JPC as a preamplifier for qubit readout applications.Comment: 21 pages, 16 figures, 4 table

Dampak Kawasan Konservasi Laut Daerah terhadap Kondisi Ekologi Terumbu Karang (Studi Kasus Desa Sabang Mawang dan Teluk Buton Kabupaten Natuna Provinsi Kepulauan Riau)

Melalui Proyek Rehabilitasi dan Pengelolaan Terumbu Karang Tahap II atau Coral Reef Rehabilitation and Management (COREMAP II), sebagian kawasan perairan Kepulauan Natuna diperuntukkan sebagai Kawasan Konservasi Laut Daerah (KKLD). KKLD di Kabupaten Natuna ditetapkan dengan Surat Keputusan Bupati Natuna No. 299 Tahun 2007, tanggal 5 September 2007. Penelitian ini dilaksanakan di Desa Sabang Mawang dan Desa Teluk Buton, Kabupaten Natuna, Provinsi Kepulauan Riau. Tujuan penelitian ini adalah untuk (a) mengkaji dampak KKLD terhadap kondisi ekologi terumbu karang berupa persentase tutupan karang hidup, kelimpahan ikan karang, keanekaragaman, dan kemerataan ikan karang, dan kelimpahan megabenthos, dan (b) menyusun skenario pengelolaan KKLD. Pengambilan data karang menggunakan metode Line Intercept Transect (LIT), ikan karang menggunakan metode Underwater fish Visual Census (UVC), dan bentos menggunakan metode Reef Check Benhtos (RCB). Selanjutnya pengumpulan data sosial menggunakan metode observasi, wawancara terstruktur dan Focus Group Discussion (FGD). Hasil penelitian ini menunjukkan terjadinya peningkatan persentase tutupan karang hidup, keanekaragaman karang batu, dan ikan karang serta kelimpahan megabenthos di stasiun penelitian yang berstatus sebagai Daerah Perlindungan Laut Berbasis Masyarakat (DPLBM) Desa Sabang Mawang. Sedangkan di Desa Teluk Buton yang tidak berstatus sebagai DPLBM hanya variabel persentase tutupan karang hidup yang meningkat. Kondisi sosial sangat mempengaruhi pencapaian tujuan ekologis pembentukan KKLD. Intensitas pendampingan serta intervensi proyek sebagai alat untuk melakukan Perubahan sosial telah berhasil merubah persepsi, partisipasi, dan pola pemanfaatan sumberdaya terumbu karang di Desa Sabang Mawang. Sebaliknya di Desa Teluk Buton belum terlihat adanya Perubahan yang cukup nyata. Skenario jalur yang dikembangkan berhasil menetapkan beberapa hal penting yang harus dilakukan untuk pengembangan KKLD terutama terkait dengan lembaga pengelola KKLD, zonasi, dan penegakan hukum

Signal-to-pump back-action and self-oscillation in Double-Pump Josephson Parametric Amplifier

We present the theory of a Josephson parametric amplifier employing two pump sources. Our calculations are based on Input-Output Theory, and can easily be generalized to any coupled system involving parametric interactions. We analyze the operation of the device, taking into account the feedback introduced by the reaction of the signal and noise on the pump power, and in this framework, compute the response functions of interest - signal and idler gains, internal gain of the amplifier, and self-oscillation signal amplitude. To account for this back-action between signal and pump, we adopt a mean-field approach and self-consistently explore the boundary between amplification and self-oscillation. The coincidence of bifurcation and self-oscillation thresholds reveals that the origin of coherent emission of the amplifier lies in the multi-wave mixing of the noise components. Incorporation of the back-action leads the system to exhibit hysteresis, dependent on parameters like temperature and detuning from resonance. Our analysis also shows that the resonance condition itself changes in the presence of back-action and this can be understood in terms of the change in plasma frequency of the junction. The potential of the double pump amplifier for quantum-limited measurements and as a squeezer is also discussed.Comment: 25 pages, 20 figures, three appendice

Consumer engagement with social media platforms: a study of the influence of attitudinal components on cutting edge technology adaptation behaviour

Despite pervasive use of digital devices, the influence of simultaneous and combined attitudinal components on consumers’ social media adaptation behaviours remains understudied. This research aims to address this gap in the literature by examining the influence of combined attitudinal components on consumers’ continuous interaction with social media platforms. An online survey was conducted to obtain robust quantitative data on consumers’ interaction and engagement with cutting edge technology such as social media. The findings indicate that consumers’ combined cognitive (perceived opportunity, perceived social influence and perceived control) and affective (enjoyment, self-enhancement, trust and fear) attitudinal components are the antecedents to consumers’ positive and negative adaptation behaviours of social media platforms. Consumers continuously engage with cutting edge social media platforms, either in positive adaptation behaviour (exploration to maximise or exploitation to satisfice social media led benefits) or negative adaptation behaviour (explore to revert from or avoid social media platforms) influenced by combined cognitive and affective attitudinal attributes. The study enriches and advances existing literature by identifying and analysing the influence of both cognitive and affective attitudinal attributes influencing consumers’ positive and negative adaptation behaviours of cutting edge digital technology such as social media platforms. The study helps marketers and IS managers in profiling consumers and understanding consumption patterns while interacting with cutting edge social medial platforms