Quantum Griffiths phase in CePd(1-x)Rh(x) with x ~ 0.8

The magnetic field dependence of the magnetisation ($M$) and the temperature dependence of the ac susceptibility ($\chi' = dM/dH$) of CePd(1-x)Rh(x) single crystals with $0.80 \leq x \leq 0.86$ are analysed within the frame of the quantum Griffiths phase scenario, which predicts $M \propto H^{\lambda}$ and $\chi' \propto T^{\lambda-1}$ with $0 \leq \lambda \leq 1$. All $M$ vs $H$ and $\chi'$ vs $T$ data follow the predicted power-law behaviour. The parameter $\lambda$, extracted from $\chi'(T)$, is very sensitive to the Rh content $x$ and varies systematically with $x$ from -0.1 to 0.4. The value of $\lambda$, derived from $M(H)$ measurements on a \cpr single crystal, seems to be rather constant, $\lambda \approx 0.2$, in a broad range of temperatures between 0.05 and 2 K and fields up to about 10 T. All observed signatures and the $\lambda$ values are thus compatible with the quantum Griffiths scenario.Comment: 4 pages, 3 figure

Quantum wire junctions breaking time reversal invariance

We explore the possibility to break time reversal invariance at the junction of quantum wires. The universal features in the bulk of the wires are described by the anyon Luttinger liquid. A simple necessary and sufficient condition for the breaking of time reversal invariance is formulated in terms of the scattering matrix at the junction. The phase diagram of a junction with generic number of wires is investigated in this framework. We give an explicit classification of those critical points which can be reached by bosonization and study the interplay between their stability and symmetry content.Comment: Extended version (Appendices C and D and some references added, typos corrected) to appear in Phys. Rev.

Reef Rescue Marine Monitoring Program: Using remote sensing for GBR-wide water quality. Final report for 2012/13 activities

This report delivers management relevant information of flood events and inshore water quality compliance based on tailored temporal and spatial analysis of remote sensing data, carried out by CSIRO as part of the Reef Rescue Marine Monitoring Program (MMP) from 2005 to 2013

Universal signatures of the metamagnetic quantum critical endpoint: Application to CeRu2Si2

A quantum critical endpoint related to a metamagnetic transition causes distinct signatures in the thermodynamic quantities of a compound. We argue that, irrespective of the microscopic details of the considered material, the diverging differential susceptibility combined with the Ising symmetry of the endpoint give rise to a number of characteristic metamagnetic phenomena. In the presence of a magnetoelastic coupling, one finds a correspondence of susceptibility, magnetostriction and compressibility and, as a result, a pronounced crystal softening, a diverging Grueneisen parameter, a sign change of thermal expansion alpha(H), and a minimum in the specific heat coefficient gamma(H). We illustrate these signatures and their relation on the metamagnetic crossover at 8 T in the prototypical heavy-fermion system CeRu2Si2.Comment: 8 pages, 6 figures, v2: changed title, minor modification

Magnetic order and spin dynamics across a ferromagnetic quantum critical point: μ\muSR investigations of YbNi4_4(P1−x_{1-x}Asx_x)2_2

In the quasi-1D heavy-fermion system YbNi$_4$(P$_{1-x}$As$_x$)$_2$ the presence of a ferromagnetic (FM) quantum critical point (QCP) at $x_c$ $\approx 0.1$ with unconventional quantum critical exponents in the thermodynamic properties has been recently reported. Here, we present muon-spin relaxation ($\mu$SR) experiments on polycrystals of this series to study the magnetic order and the low energy 4$f$-electronic spin dynamics across the FM QCP. The zero field $\mu$SR measurements on pure YbNi$_4$(P$_{2}$ proved static long range magnetic order and suggested a strongly reduced ordered Yb moment of about 0.04$\mu_B$. With increasing As substitution the ordered moment is reduced by half at $x = 0.04$ and to less than 0.005 $\mu_B$ at $x=0.08$. The dynamic behavior in the $\mu$SR response show that magnetism remains homogeneous upon As substitution, without evidence for disorder effect. In the paramagnetic state across the FM QCP the dynamic muon-spin relaxation rate follows 1/$T_{1}T\propto T^{-n}$ with $1.01 \pm 0.04 \leq n \leq 1.13 \pm 0.06$. The critical fluctuations are very slow and are even becoming slower when approaching the QCP.Comment: 6 pages, 4 figure

PENERAPAN TEORI ARSITEKTUR NEO -VERNAKULAR DALAM RE-DESAIN TERMINAL PENUMPANG PELABUHAN MANADO

Abstrak Kepariwisataan merupakan salah satu faktor pendorong ekonomi terkuat di Indonesia terlebih khusus pariwisata maritim, berhubung Indonesia merupakan suatu negara kepulauan sehingga pengadaan sarana dan prasarana transportasi laut berupa terminal pelabuhan menjadi sangat penting baik sebagai fungsi perhubungan transportasi orang antar pulau, pengembangan ekonomi daerah, serta sebagai pendukung berlangsungnya kegiatan pariwisata. Melihat kondisi terminal pelabuhan Manado sekarang, masih terdapat beberapa kekurangan yang masih dapat dioptimalkan terkait pengelolaan terminal penumpang serta fasilitas – fasilitas pendukung pada objek tersebut berupa lahan parkir, pola sirkulasi kendaraan yang terkesan tidak teratur, serta pengorganisasian ruang dalam. Terminal penumpang pelabuhan Manado juga memiliki banyak potensi yang masih dapat dimanfaatkan, salah satunya adalah nilai historik yang terkandung pada lokasi tersebut berupa bangunan eks belandayang dapat meningkatkan nilai historik tapak sebagai suatu tujuan pariwisata, sehingga arsitektur vernakular dapat digunakan untuk mempertahankan nilai tersebut serta dapat mempresentasikan budaya – budaya rumah adat Walewangko. Namun melihat perkembangan jaman sekarang, gaya arsitektur yangsering digunakan adalah modern, serta pada masa kini sudah terdapat berbagai macam teknologi, bahan dan material yang lebih maju, sehingga arsitektur vernakular akan mudah dianggap kuno. Maka dari itu, arsitektur neo vernakular akan diterapkan agar objek dapat beradaptasi dengan perkembangan jaman terkait bangunan bangunan modern. Dalam perancangan ini, metode perancangan yang digunakan adalah metode “glassbox” yang merupakan metode perancangan yang tidak timbul secara spontan melainkan dilakukan secara bertahap, dengan memperhatikan serta mempertimbangkan hal-hal tertentu berupa data, analisa dan sintesis.  Kata Kunci – Pelabuhan, Terminal, Arsitektur, Kepariwisataan, Manado.   Abstract Tourism is one of the strongest economic driving factors in Indonesia, especially maritime tourism, because Indonesia is an archipelagic country so that the procurement of marine transportation facilities and infrastructure in the form of port terminals is very important both as a function of inter-island transportation for people, regional economic development, and as a support to the ongoing tourism activities. Looking at the current condition of the Manado port terminal, there are still some deficiancy that can still be optimized related to the management of the passenger terminal and the supporting facilities on the object in the form of parking lots, vehicle circulation patterns that seem irregular, and the organization of indoor space. Manado Port Passenger Terminal also has a lot of potential that can still be utilized, one of which is the historical value contained at the location in the form of ex-Dutch buildings which can increase the historical value of the site as a tourism destination, therefore vernacular architecture can be used to maintain the historical value also can represent some of the traditional house Walewangko. Looking at current developments of time, the architectural style that is often used is the modern style, and nowadays there are various kinds of technology, tools and materials that are more advanced, so that vernacular architecture will easily be considered ancient. Therefore, neo vernacular architecture will be applied so that objects can adapt to the developments of the times related to modern buildings. In this design, the design method used is the "glassbox" method, which is a design method that does not arise spontaneously but is carried out in stages, taking into account and considering certain things in the form of data, analysis and synthesis.  Keywords – Port, Terminal, Architecture, Tourism, Manado

Junctions of anyonic Luttinger wires

We present an extended study of anyonic Luttinger liquids wires jointing at a single point. The model on the full line is solved with bosonization and the junction of an arbitrary number of wires is treated imposing boundary conditions that preserve exact solvability in the bosonic language. This allows to reach, in the low momentum regime, some of the critical fixed points found with the electronic boundary conditions. The stability of all the fixed points is discussed.Comment: 16 pages, 2 figures, typos corrected, Refs adde

Deforestation-induced climate change reduces carbon storage in remaining tropical forests

Biophysical effects from deforestation have the potential to amplify carbon losses but are often neglected in carbon accounting systems. Here we use both Earth system model simulations and satellite–derived estimates of aboveground biomass to assess losses of vegetation carbon caused by the influence of tropical deforestation on regional climate across different continents. In the Amazon, warming and drying arising from deforestation result in an additional 5.1 ± 3.7% loss of aboveground biomass. Biophysical effects also amplify carbon losses in the Congo (3.8 ± 2.5%) but do not lead to significant additional carbon losses in tropical Asia due to its high levels of annual mean precipitation. These findings indicate that tropical forests may be undervalued in carbon accounting systems that neglect climate feedbacks from surface biophysical changes and that the positive carbon–climate feedback from deforestation-driven climate change is higher than the feedback originating from fossil fuel emissions

Evidence for a Kondo destroying quantum critical point in YbRh2Si2

The heavy-fermion metal YbRh$_{2}$Si$_{2}$ is a weak antiferromagnet below $T_{N} = 0.07$ K. Application of a low magnetic field $B_{c} = 0.06$ T ($\perp c$) is sufficient to continuously suppress the antiferromagnetic (AF) order. Below $T \approx 10$ K, the Sommerfeld coefficient of the electronic specific heat $\gamma(T)$ exhibits a logarithmic divergence. At $T < 0.3$ K, $\gamma(T) \sim T^{-\epsilon}$ ($\epsilon: 0.3 - 0.4$), while the electrical resistivity $\rho(T) = \rho_{0} + aT$ ($\rho_{0}$: residual resistivity). Upon extrapolating finite-$T$ data of transport and thermodynamic quantities to $T = 0$, one observes (i) a vanishing of the "Fermi surface crossover" scale $T^{*}(B)$, (ii) an abrupt jump of the initial Hall coefficient $R_{H}(B)$ and (iii) a violation of the Wiedemann Franz law at $B = B_{c}$, the field-induced quantum critical point (QCP). These observations are interpreted as evidence of a critical destruction of the heavy quasiparticles, i.e., propagating Kondo singlets, at the QCP of this material.Comment: 20 pages, 8 figures, SCES 201