Development of a method for calculating the LTEC anisotropy of Zr alloys

The accuracy of determining the LTEC with respect to metals and alloys with an HCP lattice based on inverse pole figures (IPF) is analyzed depending on the number of experimental points on the IPF using three averaging options: (1) taking into account the irregular arrangement of reflections on the stereographic triangle according to Morris; (2) by the multiplicity factor and (3) with the same weight of each orientation. It is shown that when evaluating the LTEC for semi-finished products with a basal texture, 17 reflections on the IPF are sufficient to provide an error of <1% when using Morris averaging and the multiplicity factor; in the case of a prismatic texture, an error of <1% is provided by all three averaging options, while Morris averaging is minimal.

Revitalization of T-Garden Little Bali in Medan as Education and Recreation Based Tourism Object in Deli Serdang Regency

The tourist area of Little Bali T-Garden in Medan is located in Jati Kesuma Village, Kec. Namorambe, Deli Serdang Regency, North Sumatra. Which is one of the natural tourist areas located on the edge of Medan City. The place has an area of ​​± 20 hectares dominated by green open space. This research focuses on knowledge in utilizing existing potential to have a positive impact. The purpose of this research is to revitalize the tourist area to make it more vibrant and useful. This research was conducted using qualitative methods, namely making direct observations in the research area. The phenomenon that occurs in tourist areas has an irregular arrangement and does not fully utilize the land area. The circumstances that occur are things that considered as potentially not being used. Area revitalization uses Place Attachment theory as a basis, outdoor space design theory as a determinant of the needs of tourist areas, and Kevin Lynch's theory will be used to determine what is considered attractive and has the potential to be developed or removed. These results were obtained from the revitalization of the area as an educational and recreational tourism object in Deli Serdang Regency.

Structure-Assembly-Property Relationships of Simple Ditopic Hydrogen Bonding Capable π-Conjugated Oligomers

A series of simple ditopic hydrogen bonding capable molecules functionalized with 2,4-diamino-1,3,5-triazine (DAT), barbiturate (B), and phthalhydrazide (PH) on both termini of a 2,2′-bithiophene linker were designed and synthesized. The intrinsic electronic structures of the ditopic DAT, PH, and B molecules were investigated with ground-state DFT calculations. Their solution absorbance was investigated with UV-vis, where it was found that increasing size of R group substituent on the bithiophene linker resulted in a general blue-shift in solution absorbance maximum. The solid-state optical properties of ditopic DAT and B thin films were evaluated by UV-vis, and it was found that the solid-state absorbance was red-shifted with respect to solution absorbance in all cases. The three DAT molecules were vacuum thermal deposited onto Au(111) substrates and the morphologies were examined using STM. (DAT-T)2 was observed to organize into six-membered rosettes on the surface, whereas (DAT-TMe)2 formed linear assemblies before and after thermal annealing. For (DAT-Toct)2 , an irregular arrangement was observed, while (B-TMe)2 showed several co-existent assembly patterns. The work presented here provides fundamental molecular-supramolecular relationships useful for semiconductive materials design based on ditopic hydrogen bonding capable building blocks.

Injuries and molting interference in a trilobite from the Cambrian (Furongian) of South China

An injured Shergoldia laevigata Zhu, Hughes & Peng, 2007 (Trilobita, Asaphida) was collected from the Furongian of Guangxi, South China. The injuries occurred in the left thoracic pleurae possessing two marked V-shaped gaps. It led to substantial transverse shortening of the left pleural segments, with barely perceptible traces of healing. This malformation is interpreted as a sub-lethal attack from an unknown predator. The morphology of injuries and the spatial and temporal distribution of predators indicated that the predatory structure might have been the spines on the ganathobase or ganathobase-like structure of a larger arthropod. There were overlapped segments located in the front of the injuries, and slightly dislocated thoracic segments on the left part of the thorax, suggesting that the trilobite had experienced difficulties during molting. The freshly molted trilobite had dragged forward the old exuvia causing the irregular arrangement of segments. This unusual trilobite specimen indicates that the injuries interfered with molting.

Thin Graphene–Nanotube Films for Electronic and Photovoltaic Devices: DFTB Modeling

Supercell atomic models of composite films on the basis of graphene and single-wall carbon nanotubes (SWCNTs) with an irregular arrangement of SWCNTs were built. It is revealed that composite films of this type have a semiconducting type of conductivity and are characterized by the presence of an energy gap of 0.43–0.73 eV. It was found that the absorption spectrum of composite films contained specific peaks in a wide range of visible and infrared (IR) wavelengths. On the basis of calculated composite films volt-ampere characteristics (VAC), the dependence of the current flowing through the films on the distance between the nanotubes was identified. For the investigated composites, spectral dependences of the photocurrent were calculated. It was shown that depending on the distance between nanotubes, the maximum photocurrent might shift from the IR to the optical range.

Analisis Variasi Temperatur Aktivasi Terhadap Struktur Kristalin Arang Aktif Dari Tandan Aren (Arenga Pinnata Merr) Dengan Agen Aktivasi Potassium Silicate (K2SiO3)

This study aims to determine the effect of variations of activation temperature of activated carbon from sugar palm bunches of chemically activatied with the activation agent of potassium silicate (K2SiO3) on the crystalline structure. Activated carbon is the result of pyrolysis of carbonaceous raw materials at temperatures lower than of 1000 oC. Activated carbon from bunches of sugar palm acquired in four steps: preparation steps, carbonization steps using the pyrolysis reactor with temperature of 300 oC - 400 oC for 8 hours and chemical activation using of potassium silicate (K2SiO3) activator in weight ratio of 2: 1 and physical activation using the electric furnace for 30 minutes with temperature variation of 600 oC, 650 oC, 700 oC, 750 oC and 800 oC. The crystalline structure tested by X-Ray Diffraction (XRD) method, the results yielded of 26,60o, 26,62o, 26,16o, 26,22o, 26,97o, and 26,68o respectively. The highest crystalline structure yield was 22.26% at temperature of 600 oC and the lowest was 8.83% at temperature of 650 oC. The results obtained were amorphous 91.17% at the highest temperature of 650 oC and the lowest 77.74% at temperatur of 600 oC which has a random and irregular arrangement pattern of atoms or molecules repeatedly or not periodically.

SURFACE WAVE SUPPRESSION METHOD IN SEISMIC MONITORING OF GEODYNAMIC PROCESSES BY SURFACE SURVEILLANCE SYSTEMS WITH IRREGULAR RECEIVERS SURFACE

A multichannel method of suppressing surface waves contained in seismic monitoring data collected by surface observation systems with irregular arrangement of receivers is proposed. The possibilities of using various spectral transformations in the implementation of the proposed method are considered. The results of testing the algorithm on synthetic data are presented. The conditions for using the proposed method in practice are formulated.

FAKTOR – FAKTOR PENGARUH PREFERENSI PENGGUNA PASAR PETEROGAN SEMARANG PASCA REVITALISASI

Declining visitor interest in traditional markets is one of the problems currently faced by traditional markets. The form of government effort to maintain the existence of traditional markets is by conducting a revitalization program. Semarang Peterongan Market is one of the Semarang City public facilities located on Jl. MT. Haryono No.936, Peterongan, Kec. South Semarang. Before burned, the conditions were very poor namely slums, dirty, irregular arrangement of shanties and unavailability of parking lots. This study aimed to identify the factors that caused traders not to occupy the 2nd and 3rd floors of the Peterongan Market , identifying buyer preferences to the efforts of the revitalization program that have been carried out at the Peterongan Market and to evaluate the physical, non-physical components and infrastructure that exist in the Peterongan Market. The study used a descriptive qualitative approach. Data collection is done by means of observation and interviews with market agencies, visitors and traders. The results showed that there were factors that caused traders not to occupy the 2nd and 3rd floors, buyers were reluctant to go up to the 2nd and 3rd floors, there was worst accessibility for traders or buyers, there were obstacles in the circulation of merchandise, design and size of kiosks and booths. accommodate the needs of traders. Buyers and traders' preferences are access and circulation that can accommodate their needs in the market, design kiosks and booths that are suitable for their trade. Based on the analysis results of the Semarang Peterongan Market building evaluation analyzed with regulations that apply to the physical component, it is generally appropriate.Keyword: zoning, circulation, user preferences,revitalizationAbstrak: Menurunya minat pengunjung terhadap pasar tradisional menjadi salah satu masalah yang sedang dihadapi pasar tradisional sekarang ini. Bentuk usaha pemerintah untuk menjaga eksistensi pasar tradisional yaitu dengan melakukan program revitalisasi. Pasar Peterongan Semarang merupakan salah satu fasilitas publik Kota Semarang yang berlokasi di Jl. MT. Haryono No.936, Peterongan, Kec. Semarang Selatan. Sebelum mengalami kebakaran,kondisi pasar sangat memprihatinkan yaitu kumuh,kotror,penataan lapak yang tidak teratur serta tidak tersedianya lahan parkir.Penelitian ini bertujuan untuk mengidentifikasi faktor-faktor pengaruh preferensi pengguna tentang apa saja penyebab pedagang tidak menempati lantai 2 dan lantai 3 Pasar Peterongan Semarang,mengidentifikasi preferensi pembeli terhadap upaya program revitalisasi yang sudah dilakukan di Pasar Peterongan serta mengevaluasi komponen fisik,non fisik serta prasarana yang ada pada Pasar Peterongan. Penelitian menggunakan metode pendekatan kualitatif deskriptif . Pengumpulan data dilakukan dengan cara observasi dan wawancara dengan dinas pasar,pengunjung serta pedagang. Hasil penelitian menunjukkan adanya faktor-faktor penyebab pedagang tidak menempati lantai 2 dan lantai 3 adalah pembeli enggan naik ke lantai 2 dan 3,tidak adanya aksesbilitas yang baik untuk pedagang maupun pembeli,terdapat kendala dalam sirkulasi barang dagangan,desain serta ukuran kios dan los tidak mengakomodasi kebutuhan pedagang. Preferensi pembeli dan pedagang cenderung dengan adanya akses serta sirkulasi yang dapat mengakomodasi kebutuhan mereka didalam pasar,desain kios serta los yang sesuai dengan jenis dagangan mereka. Berdasarkan hasil analisis evaluasi bangunan Pasar Peterongan Semarang dianalisis dengan peraturan yang berlaku pada komponen fisik,umumnya sesuai.Kata Kunci: zoning,sirkulasi,preferensi pengguna,revitalisasi

Implementasi Data Mining Penjualan Produk Pakaian Dengan Algoritma Apriori

<p>The problem faced by the Tanjung Redjo clothing store is the lack of management of sales data and irregular arrangement of clothing products. The arrangement of the location of clothing products on the shelf is not well regulated. The speed of service to customers can be improved by making the layout of clothing products good and orderly, so that store staff can find clothing products quickly. Shoppers can also search and view apparel accessories that are often sold together quickly, potentially increasing store sales turnover. A better and more organized arrangement of clothing products can be done by analyzing sales transactions that occur daily at the store by using the Apriori algorithm. By using this algorithm, the shop owner can find out the tendency of a combination of clothing products that are often sold at the same time, so that the shop owner can arrange the layout of clothing products well and regularly so that buyers or employees can find and retrieve clothing products quickly. How the Apriori algorithm works to find a combination of clothing products that are often sold simultaneously from a sales transaction. Rules applied If buying KA-701 and KK-201 and SP-2001, then buy ST-651. Support and Confidence values are calculated until 4 combination items are obtained to get the best selling associative rule output output.</p>

Поведение доноров лития в объемных монокристаллических моноизотопных сплавах -=SUP=-28-=/SUP=-Si-=SUB=-1-x-=/SUB=--=SUP=-72-=/SUP=-Ge-=SUB=-x-=/SUB=-

We studied the behavior of lithium donors in bulk single-crystal single-crystal alloys Si1-xGex, (x=0.0039-0.05), enriched in spinless isotopes 28Si (99.998%) and 72Ge (99.984%) by electron paramagnetic resonance (EPR). The fine structure of the spectrum of a donor electron localized on lithium (T=3.5–30 K) was studied under the assumption that, when spinless isotopes (28Si isoGe, iso = 70, 72, 74, 76) are enriched in Si1-xGex alloys, it is possible to achieve in higher resolution in the EPR spectra as was observed in silicon. Studies have shown that despite the irregular arrangement of germanium atoms in the lattice of a SiGe, the local distortions they create and the broadening of the EPR lines of donor electrons due to random deformations in isotopically pure 28Si1-х72Geх single crystals at x=0.39; 1.2; 2.9 %, narrower lines of the ESR spectra of lithium were observed in comparison with similar crystals with a natural composition of silicon and germanium isotopes, which made it possible, as in silicon, to study for the first time the angular dependences of the line positions in the ESR spectra of lithium in Si1-xGex for various x.