Nonlinear Optical Rectification of Tuned Quantum Dots Under the Action of a Vertical Magnetic Field

The effects of tuned quantum dots (QD) on the optical rectification (OR) coefficient under the action of the external magnetic field, hydrostatic pressure, temperature and quantum dot radius is theoretically studied in detail. The tuned quantum dots are subjected to a uniform magnetic field perpendicular to the structure plane. Within the framework of effective mass approximation and parabolic approximation, the energy level and wave function are derived, and the nonlinear optical rectification coefficients are calculated by the compact density matrix method and iterative method. Numerical results show that under different constraint parameters, the resonance peak of the OR coefficient moves in the direction of high energy or low energy, that is, red shift or blue shift. At the same time, the peak value of the OR coefficient will increase or decrease with the change of the parameters.

A Drawing System for Pole Diagram and Rose Diagram of Rock Mass Structural Surface

The distribution of structural planes is complex and irregular. How to quickly and effectively obtain the occurrence and distribution characteristics of structural planes and improve the efficiency of data processing is a key technical issue in structural plane analysis. The paper combined fuzzy equivalent clustering algorithm, rose diagram drawing method, and C++ language, developed a drawing system for the pole diagram and rose diagram of rock mass structural planes, and verified the practicability of the system through an engineering case analysis. In the article, the fuzzy equivalent clustering of the occurrence of structural planes, the drawing of pole diagram, and the statistical analysis of structural planes were realized based on the fuzzy equivalent clustering algorithm. The rapid drawing of the striking rose diagram, trending rose diagram, and dip rose diagram module were realized based on the rose diagram drawing method. The system integrated the structure plane pole diagram and the occurrence rose diagram together and realized the rapid analysis and drawing of the structure plane.

Perencanaan Sistem Pemasaran Online Produk Pertanian Melalui E-Marketplace

Angka pengguna internet semakin berkembang pada era revolusi industry 4.0. Hal ini dapat dimanfaatkan untuk mengembangkan bisnis secara lebih luas, salah satunya dapat memanfaatkan berbagai media pemasaran online yang tersedia seperti marketplace. Sektor pertanian berpotensi untuk diterapkan pemasaran produk secara online yang mengadopsi konsep marketplace. Namun, berbagai tantangan muncul seiring dengan lahirnya berbagai marketplace di Indonesia, khususnya berkaitan dengan kemudahan penggunaan marketplace produk pertanian, mengingat pengguna internet di Indonesia beranjak dari berbagai rentang usia dan latar belakang. Artikel ini bertujuan membangun perancangan marketplace pertanian dengan menerapkan kualitas pelayanan marketplace yang baik dengan memperhatikan nilai user experience (UX), tingkat efektivitas serta tingkat efisiensi untuk pengguna. Metode yang digunakan dalam perancangan marketplace ini adalah metode five plane user experience elements yang terdiri dari lima tahapan antaralain Strategy Plane, Scope Plane, Structure Plane, Skeleton Plane, Surface Plane yang memiliki keterkaitan antar lapisnya. Adapun hasil penelitian ini menunjukkan bahwa responden membutuhkan suatu aplikasi yang lebih menarik dalam segi tampilan seperti memberikan detail produk yang lengkap dengan hasil gambar yang nyata, juga menampilkan gambar dari sudut pandang yang berbeda – beda serta pemilihan huruf (font) dan tema warna yang sesuai. Sedangkan perancangan prototipe HiTani sebagai hasil dari adaptasi terhadap karakteristik dan kebutuhan konsumen menunjukkan hasil perhitungan Success Rate yang diperoleh pada pengujian tingkat efektifitas sebesar 85,6% dengan tingkat pencapaian sangat efektif, dan pengukuran terhadap tingkat efisiensi pada prototype ini nilai efisiensinya dalah 84,74% maka dapat disimpulkan bahwa prototype marketplace HiTani ini sudah efisien dari segi efisiensi waktu penggunaannya.

STRUCTURAL GEOLOGY FAULT EFFECT ON HIGHWALL COAL MINING AND FAILURE EVALUATION BASED ON VELOCITY DATA AT BENGALON, EAST-KUTAI DISTRIC, EAST KALIMANTAN PROVINCE.

The geological structure especially folds and faults will reduce slope stability at slope mining where many events are the main factors that trigger slope failure. The geological structure "unknown" is defined as a minor geological structure that was not defined in the initial geological modeling. This uncertainty geological structure is critical issue during the mining process in coal mining. Slope stability Radar is a monitoring instrument that has been used in this research. In SSR data analysis, graphical behavior from velocity data is for monitoring program. The analysis in this research consisted of measuring the geological structure in the area where slope failure occurred and reading the velocity acceleration data from SSR instrument.Slope failure in this research study conduct on the high-wall coal mining which is in line with the geological structure plane with direction N 2460 E and dip 480, along + 150 m and at elevations RL +30 to RL -10. Velocity value at the time of slope failure was 13,568 mm/hour. This value can then be used as a reference as the “Progressive Velocity” value before the slope failure occurs at certain slope wall conditions.The content case study is expected to help engineers in increasing confidence in determining the characteristics of slope failure based on Velocity data in areas that have a geological structure, however, this study research aims to determine basic behavior in the SSR monitoring program and serve as a reference in the risk management program in the coal Mining industry.

Research on the Deformation Mechanism of Mining Roadway Stratiform Surrounding Rock with Nonuniform Stress Field

Aiming at the failure problems of mining roadway stratiform surrounding rock influenced by asymmetrical high stress, firstly, the rock instability conditions of different structural plane angles were summarized based on the mechanical model of rock joints and instability criterion. Secondly, stresses, plastic zone, and displacement of surrounding rock with different structural plane angles were calculated and analyzed with the theoretical calculation method or numerical simulation method, respectively. The distribution characteristics of plastic zone of surrounding rock under different influence factors are further studied, and the results show that the lateral pressure coefficient can change the size and shape of plastic zone at the same time. The damage mechanism was analyzed through the above study. Research studies show that the shear and tension failure area of plastic zone were directly determined by the maximum shear stress and the minimum principal stress. The effect of structure planes on stress has two sides, one to destroy the continuity and the other to strengthen discreteness and laddering nature. When the angle between maximum shear stress and structure plane increases, the extended mode and distribution pattern of plastic zone change substantially as well. The #15 haulage roadway is taken as engineering background, and the above research’s results are verified by the comprehensive analysis. The research results can enrich the butterfly plastic zone theory and provide the basis for roadway supporting design.

Investigating the Influences of Indentation Hardness and Brittleness of Rock-Like Material on Its Mechanical Crushing Behaviors

Indentation hardness and brittleness are the important factors to be considered in the study of rock-like materials’ mechanical crushing behaviors. The brittleness of rock-like materials is defined as the ratio of uniaxial compressive strength to tensile strength in this paper. In order to investigate the influences of hardness and brittleness on rock-like materials’ crushing behaviors, quartz sand and high strength α-hemi-hydrated gypsum were used to prepare rock-like materials with different hardness and brittleness through different mass ratios. The artificial rock-like materials can eliminate the effects of natural rock’s weak structure plane on experimental results. The indentation test, Uniaxial compressive test, and Brazilian tensile test were conducted for characterizing the indentation hardness and brittleness of this artificial rock-like materials. The experimental results showed that brittleness increased with the increase of indentation hardness with high correlation coefficient. The confining stress presented a positive impact on the indentation hardness of the rock-like materials. Based on those mechanical properties, the numerical rock models were calculated to study rock crushing behaviors using discrete element method (DEM). A series of rock crushing tests were conducted to investigate the influences of hardness and brittleness of rock-like materials on rock crushing behaviors using a conical pick cutter. The numerical results showed that the normalized specific energy was negatively correlated with indentation hardness index (IHI). The normalized specific energy decreased with the increase of brittleness index (BI) with a high correlation coefficient. This study is beneficial in utilizing IHI and BI to evaluate the mechanical properties, failure patterns, and mechanical crushing efficiency of rock-like materials.

Designing User Experience and User Interface of a B2B Textile e-Commerce using Five Planes Framework

The textile industry needs an e-commerce platform to facilitate purchase of textile goods and to improve connectivity between industries. The textile industry has distinct characteristics from other industry, from its supply chain characteristics to the details of goods sold. Therefore, Indonesia Smart Textile Industry Hub (ISTIH) as a textile e-commerce platform needs to implement different strategy from e-commerce in general. Different strategies will affect the design of user experience or user experience in e-commerce. This journal will discuss how to design e-commerce specifically for textiles using the five planes method. The strategy plane produced the objectives and user needs of e-commerce, the scope plane produced the list of the required features, the structure plane produced detailed flow of user activities, the skeleton plane produced layout designs and information organization in the form of wireframes, and the surface plane produced the design up to the level of interface detail. The interface detail is also designed to meet eight golden rules of interface design. The output produced in this study is the design of the textile e-commerce interface on the alpha version of the website.

Geological Structural Surface Evaluation Model Based on Unascertained Measure

The surrounding rock structure plane survey is the basis for mine geological structure evaluation and stability of surrounding rock. On the basis of the unascertained measurement theory and scanline method, the surrounding rock stability of the underground geological structure plane in Lingbao Luoshan Gold Mine is evaluated. First, according to the structural plane five grading standards, the 9 single-index measure functions are constructed. Second, the information entropy is used to determine the weight of each indicator. Accordingly, a multi-index comprehensive measure evaluation vector is established. Finally, the confidence level is used to determine the structural plane stability level. Results show that surrounding rock grades of middle sections of R1, R2, and R3 are Grades III, IV, and IV in Lingbao Luoshan Gold Mine, respectively. The evaluation grade is consistent with the actual situation of the mine, and strengthening the surrounding rock support for the middle sections of R2 and R3 is necessary. According to engineering practice, the evaluation model of the underground structure of metal mines established in this study has a practical value.

Perancangan User Experience Website Profil Dengan Metode The Five Planes (Studi kasus: BP3K Kecamatan Mundu)

User experience merupakan salah satu faktor penting yang dapat mendukungkeberhasilan dalam membangun suatu website. Website yang baik adalah website yang mempertimbangkan dan memperhatikan kemudahan pengguna, sehingga tidakmenyebabkan kesulitan bagi pengguna ketika mengakses website tersebut. Saat ini penyampaian dan penyebaran informasi penyuluhan di BP3K Mundu masih sering terjadi kesalahan dalam memahami komunikasi yang diterima. Selain itu tampilan lama website BP3K Mundu masih belum tersusun dengan baik, sehingga pemanfaatan website belum maksimal. Penelitian ini mengajukan perancangan website profil sekaligus memperhatikan aspek user experience menggunakan metode the five planes. Metode ini terdiri dari beberapa lapisan, yaitu strategy plane, scope plane, structure plane, skeleton plane, dan surface plane. Hasil penelitian ini berupa perancangan prototipe website profil yang dilakukan sampai tahap highfidelity. Dalam proses evaluasi dilakukan pengujian terhadap tiga pengguna berdasarkan lima aspek usability yang menghasilkan nilai 86,22% pertanyaan yang mampu di jawab, dan 13,77% pertanyaan yang tidak dapat terjawab. Hasil pengujian menunjukkan bahwa website profil memiliki tingkat usability yang sangat baik sehingga bisa diterima dan siap digunakan oleh pengguna dengan fitur yang tersedia.