A New Clustering Method for Landsat Images Using Local Maximums of a Multidimensional Histogram

This paper describes a new clustering method for a huge satellite image. This method is composed of two major schemes, a multi-layered hashing scheme for multi-dimensional histogram (MDH) and a histogram clustering scheme using MDH. The MDH construction scheme works in 3 stages. In the 1st stage it constructs a few histogram layers for each part of an image, and in the 2nd and 3rd stages histogram layers are combined into one histogram. The clustering scheme searches for local maximums of MDH, and decides clusters around local maximums as sets of hyperrectangles. The major parameters of the clustering scheme are briefly discussed, and some results are also shown

High-pressure study of the basal-plane anisotropy of the upper critical field of the topological superconductor SrxBi2Se3

We report a high-pressure transport study of the upper-critical field, $B_{c2}(T)$, of the topological superconductor Sr$_{0.15}$Bi$_2$Se$_3$ ($T_c = 3.0$ K). $B_{c2}(T)$ was measured for magnetic fields directed along two orthogonal directions, $a$ and $a^*$, in the trigonal basal plane. While superconductivity is rapidly suppressed at the critical pressure $p_c \sim 3.5$ GPa, the pronounced two-fold basal-plane anisotropy $B_{c2}^a/B_{c2}^{a^*} = 3.2$ at $T=0.3$ K, recently reported at ambient pressure (Pan et al., 2016), is reinforced and attains a value of $\sim 5$ at the highest pressure (2.2 GPa). The data reveal that the unconventional superconducting state with broken rotational symmetry is robust under pressure

Enhancement of superconductivity near the ferromagnetic quantum critical point in UCoGe

We report a high-pressure single crystal study of the superconducting ferromagnet UCoGe. Ac-susceptibility and resistivity measurements under pressures up to 2.2 GPa show ferromagnetism is smoothly depressed and vanishes at a critical pressure $p_c = 1.4$ GPa. Near the ferromagnetic critical point superconductivity is enhanced. Upper-critical field measurements under pressure show $B_{c2}(0)$ attains remarkably large values, which provides solid evidence for spin-triplet superconductivity over the whole pressure range. The obtained $p-T$ phase diagram reveals superconductivity is closely connected to a ferromagnetic quantum critical point hidden under the superconducting `dome'.Comment: 4 pages, 3 figures; accepted for publication in PR

Reconstruction of the spontaneously broken gauge theory in non-commutative geometry

The scheme previously proposed by the present authors is modified to incorporate the strong interaction by affording the direct product internal symmetry. We do not need to prepare the extra discrete space for the color gauge group responsible for the strong interaction to reconstruct the standard model and the left-right symmetric gauge model(LRSM). The approach based on non-commutative geometry leads us to presents many attractive points such as the unified picture of the gauge and Higgs field as the generalized connection on the discrete space; Minkowski space multipied by N-points discrete space. This approach leads us to unified picture of gauge and Higgs fields as the generalized connection. The standard model needs N=2 discrete space for reconstruction in this formalism. \lr is still alive as a model with the intermediate symmetry of the spontaneously broken SO(10) grand unified theory(GUT). N=3 discrete space is needed for the reconstruction of LRSM to include two Higgs bosons $\phi$ and $\xi$ which are as usual transformed as (2,2*,0)$ and (1,3,-2) under left-handed SU(2)x right-handed SU(2)x U(1), respectively. xi is responsible to make the right handed-neutrino Majorana fermion and so well explains the seesaw mechanism. Up and down quarks have the different masses through the vacuum expectation value of phi.Comment: 21 page

А methodolocical function of Novi Pazar area songs in teaching primary music literacy of lower grades of a primary school

Елементарна музичка писменост је вештина појединца да исправно и са разумевањем пева/ свира и записује слушану музику без застоја у схватању. Њена поставка представља дуг и сложен процес у коме је најтеже поставити две тонске особине - висину (мелодија и хармонија) и трајање (ритам). Обе ове особине чврсто су повезане са музичким и говорним карактеристикама једног подручја - висине са мелодијом и тоналним основама песама, а трајања са ритмом песама, игара и говорним ритмом (Васиљевић, З., 1991). Зато су народне песме - модели и наменске песме, као и говорни клишеи (бројалице/ разбрајалице, пословице, загонетке...) кључни садржаји у поставци звука мелодијско-ритмичке проблематике почетне наставе музичке писмености. С обзиром да сазнања из методике наставе музичке културе и психологије музике упућују да елементарну музичку писменост треба поставити на звучним основама музичког матерњег језика средине у којој се настава изводи, одлучили смо да кренемо у проналажење песама мултикултуралног новопазарског краја које могу преузети функцију модела и наменских песама у њему. То је било могуће само путем истраживања које је имало за циљ стварање основног музичког материјала који задовољава методичке критеријуме за поставку елементарне музичке писмености. Методом теоријске анализе релевантне литературе музичке писмености и музичке грађе новопазарског краја (етномузиколошких записа песама) створили смо претпоставку за могућност креирања музичке грађе која задовољава методичке критеријуме (материјал на коме могу да се решавају проблеми везани за наставу елементарне музичке писмености). С обзиром да се музички матерњи језик новопазарског краја временом мењао потребно је било установити и присутност методички примењивих песама и кратких говорних форми у свести деце. Резултати истраживања показали су да одређене песме новопазарског краја (уз извесна прилагођавања) и кратке говорне форме могу преузети функцију елементарног музичког описмењавања ученика млађих разреда основне школе, те да је већина њих још увек присутна у свести локланог становништва. У складу са резултатима истраживања музичког матерњег језика новопазарског краја начињен је концептуални оквир музичке грађе која је у функцији поставке елементарне музичке писмености на народним основама овог краја са свим особеностима мултикултуралне средине.The primary music literacy is a skill of an individual to sing/play correctly and write down music that is heard, with no pauses in its understanding. Its establishment represents a long and complex process, where it is the most difficult to set two tones characteristics- its altitude (melody and harmony), and its duration (rhythm). These two characteristics are tightly connected with music and speech characteristics of an areaaltitude with melody and tonal bases/ scales of songs, and duration with the songs rhythm, dancing and speech rhythm (Vasiljevic, Z., 1991). Therefore, folk songsmodels and dedicated songs, and also speech clichés (chants/nursery rhythms, proverbs, riddles), are key contents in a sound establishment with a melodic-rhythmical issue of the starting setting of music literacy. Since the knowledge from methodology of Music Culture teaching and Psychology should be established on sound bases of a music mother tongue of the area where teaching is being performed, we have decided to start in finding songs of the multicultural Novi Pazar area that can overtake a function of a model and dedicated songs in it. It has been possible only through a research that has had for its aim a creation of the primary music material that satisfies methodological criteria for establishment of the primary music literacy. With the method of a theoretical analyze of a relevant literature music literacy and music material of Novi Pazar area (ethno-music recordings of songs), we have created an assumption for a possible creation of the music material (the material where issues can be solved related to the primary teaching of music literacy). Since music mother tongue of Novi Pazar area has been changed by the time, it has also been necessary to establish the presence of methodologically applied songs and short speech forms to the awareness of the local population. The research results have shown that certain songs of Novi Pazar area (with certain modifications) and short speech forms can overtake the function of the primary music literacy of lower grades pupils of a Primary School, and thus, most of them are still present in the awareness of the children. Pursuant to the research results of the music mother tongue of Novi Pazar area, it has been made a conceptual framework of music material that is in the function of the primary music literacy in the folk bases of this area, with all its specifics of the multicultural area

Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe

We report a magnetoresistance study of the superconducting ferromagnet UCoGe. The data, taken on single-crystalline samples, show a pronounced structure at $B^* = 8.5$~T for a field applied along the ordered moment $m_0$. Angle dependent measurements reveal this field-induced phenomenon has an uniaxial anisotropy. Magnetoresistance measurements under pressure show a rapid increase of $B^*$ to 12.8~T at 1.0~GPa. We discuss $B^*$ in terms of a field induced polarization change. Upper critical field measurements corroborate the unusual S-shaped $B_{c2}(T)$-curve for a field along the $b$-axis of the orthorhombic unit cell.Comment: 6 pages, 5 figures; accepted for publication in Phys. Rev.