Mirror Frame Research Articles

Making Unique Handicrafts from Shells in Lake Bird's Nest Village

Making unique handicrafts using shells in Sarang Burung Danau Village aims to process marine waste which can be used as a creative medium for PKK mothers, increasing creativity, soft skills and an entrepreneurial spirit from an early age. This activity is focused on making unique craft items using shells as the main material, stimulating creativity and economic empowerment in the village. This initiative involves collaboration between students from various universities involved in KKN Kebangsaan 2023 activities and the local community, emphasizing the exchange of knowledge, skills and cultural experiences. The method for this service activity is to conduct a workshop which directs the training participants to practice directly making handicrafts by following the work steps. Through workshops and hands-on activities, participants explore innovative craft-making techniques while using natural resources responsibly. With this type of qualitative research, the results of this activity are a source of pride for the community, creating economic opportunities and preserving traditional skills. The products produced include pencil cases, wall hangings, mirror frames and miniature birds. The aim of this research is to encourage environmental awareness by emphasizing the sustainable use of shellfish resources. The implication of this research is that it can encourage the use of local resources, in this case shellfish, more effectively. This can help reduce pressure on the environment and promote sustainable practices in the use of natural resources.

Cost-effective 3D-printed rotatable reflectors for two-dimensional beam steering

In this paper, we have developed a 2D optical scanning module comprising cascaded 3D-printed one-axis rotating mirrors with large areas (30×30mm2 for the X-direction scan and 60×25mm2 for the Y-direction scan). Each mirror device contains a square or rectangular silicon substrate coated with aluminum, serving as the mirror. A 3D-printed structure, including the mirror frame (with four embedded mini permanent magnets on the backside), torsion springs, and base, is combined with the mirror; two electromagnets are situated under the mirror as the actuation mechanism. We apply DC voltage to the electromagnets to create magnetic force. The electromagnets can interact with the permanent magnets to make the mirror rotate. The X scan of the 2D scanning module can achieve a static optical scan angle of ∼11.8deg at the -X corners, and the corresponding Y-scan angle is ∼4.5deg, both with 12 VDC. Moreover, we have observed a fan-shaped distortion, a phenomenon not thoroughly studied previously for combining two single-axis scan mirrors. Therefore, we also perform a simulation to establish and demonstrate a correlation between the simulation prediction and experimental results. The 2D scanning module can be a low-cost alternative to the expensive conventional galvanometer scanners, and it can be used to upgrade a rangefinder to a simplified LiDAR.

ANALISIS PERHITUNGAN HARGA POKOK PRODUKSI DENGAN METODE JOB ORDER COSTING SEBAGAI DASAR PENENTUAN HARGA JUAL (STUDI KASUS MEUBEL NAFIR DESIGN KUTA BADUNG BALI)

This study aims (1) to describe the mechanism for calculating the cost of production at Furniture Nafir Design Kuta Badung (2) to describe the analysis of calculating the cost of production using the Job Order Costing method at Furniture Nafir Design Kuta Badung. The method that researchers used in data collection. the result of this field research which were not contaminated from the opinions or ideas of researchers include discussions on approaches and types of research, presence of researchers, research locations, data sources, data collection techniques, data analysis techniques, techniques for checking the validity of data, and research stages conducted by researchers in conducting research. The conclusions in this study (1) in calculating the cost of production of Furniture Nafir Design still uses simple (traditional) calculations, namely only calculating raw material costs, labor costs, and factory overhead costs which only charge electricity and telephone costs. Furniture Nafir Design also did not calculate in detail the costs that should have been charged to factory overhead costs, resulting in inaccurate calculations and discrepancies with calculations using the Job Order Costing method. The difference for photo frame products is Rp. 110,307 and for mirror frame products is Rp. 156,112. (2) The calculation of the cost of production using the Job Order Costing method is more appropriate to be applied to Furniture Nafir Design Kuta Badung because the calculation of the cost of production using the Job Order Costing method is more accurate and detailed. By using the Job Order Costing method, costs that should be charged can be calculated into the calculation of the cost of production, so that it can be easier to make decisions in determining prices for products ordered by consumers

A Safety Goggles for Dental Treatment That Can Monitor the Pulse

Objective: Using the safety goggles to protect and treat the process of fog, powder or laser injury to the eyes, reduce noise and thus reduce the patient's discomfort. At the same time, pulse frequency and vital signs of patients can be detected during treatment to improve the safety of treatment. Methods: The device is a safety goggles for dental treatment that can monitor the pulse, including a mirror frame, a protective lens mounted on one side of the frame and a first elastic band and a second elastic band located at both ends of the frame. The first elastic band and the second elastic band are connected and fixed together. The first elastic band is provided with a holding box body near the frame, and the top of the holding box body is provided with a power switch, an audio switch and a pulse monitoring switch. The body of the containing box is provided with a control chip, a power supply component, a pulse sensor, a memory and an audio component. The control chip is electrically connected with the memory, a pulse sensor, an audio component, a speaker and a power supply component, and the audio component is electrically connected with the first earplug and the second earplug through the data cable. Results: A kind of safety goggles for dental treatment which can monitor pulse was successfully designed. The device is equipped with safety goggles, so as to prevent the air fog and other dirt damage to the eyes; Pulse sensor was set to obtain pulse signal; Earplugs with extendable length are suitable for individual differences and can improve the sound insulation effect. Conclusion: The safety goggles can solve the problems of harsh light source equipped with dental treatment chair, easy to splash the eyes with aerosol during operation, and loud noise of operating instruments. In addition, it can also monitor patients' vital signs in real time during tooth implantation and extraction and prevent sudden symptoms.

Liu Hai teases the golden toad

This paper analyses auspicious motifs on the wooden mirror frame from the Skušek Collection, housed in the Slovene Ethnographic Museum. The auspicious patterns are discussed in the broader context of Chinese cultural and linguistic structures, which in the visual representation of combined plant, animal, and figure motifs, leads to innumerable combinations of rebuses and puns with homonyms based on Chinese historical, literary, philosophical, religious, and mythological tradition. In this way, auspicious motifs developed into a standard decorative scheme, providing a rich source for both literati and artisans, and were exported to neighbouring countries and the West. They are particularly widespread on objects for daily use given as tokens of good wishes for happiness, prosperity, wealth, longevity and progeny, which are also meant to ensure their fulfilment. This can be seen on the wooden mirror frame purchased in Beijing between 1914 and 1920 by naval officer Ivan Skušek Jr. In the first part of the paper, an iconographic analysis of the motifs is made, while in the second part, the messages contained in the visual symbolic codes are analysed in more detail, taking into account the arrangement of the motifs in the completed narrative and the way in which these images are interpreted.

Concord Museum, Concord, Massachusetts

<i>Concord Museum</i>, Concord, Massachusetts

Low-Cost 3D-Printed Electromagnetically Driven Large-Area 1-DOF Optical Scanners

In this paper, we demonstrate 3D-printed 1-DOF (one torsional axis; 1 degree of freedom) optical scanners with large mirror areas (up to 20 × 20 mm2). Each device consists of an aluminum-coated square silicon substrate serving as the mirror, two miniature permanent magnets, an electromagnet, and a 3D-printed structure including the mirror frame, torsion springs, and base. One device can reach a static half optical scan angle of 14.8 deg., i.e., a full optical scan angle of 29.6 deg., at 12 VDC; this particular device exhibits a mechanical resonance frequency of 84 Hz. These scanners can be a potential, low-cost alternative to the expensive conventional galvanometer scanners.

A Monolithic Forward-View Optical Scanner by a Pair of Upright MEMS Mirrors on a SiOB for LiDAR Applications

A forward-view optical scanner made of a MEMS mirror typically needs a second mirror to fold the optical beam forward, and thus an assembly structure is required, which drastically increases the overall size and weight of the scanner. This paper reports an ultra-small forward-view optical scanner with two vertically oriented micromirrors integrated on a silicon optical bench (SiOB). A new latch structure is proposed to secure the mirror frame at its vertical position and an array of meander thin-film stripes is designed to assist the latching process. The new design has been successfully fabricated and shows much-improved verticality with a maximum deviation of less than ±2° from 90°. With an optical aperture of 0.7 mm, the form factor of the MEMS chip is 4.9 mm (length) by 4.7 mm (width) by 1.8 mm (height). The measured forward field of view (FoV) of the vertical micromirrors reaches 21° in both axes at non-resonance with the voltage amplitude less than 4 V. The first resonant frequency (corresponding to the mirror frame rotation mode) of the micromirror is about 630 Hz. A fiber-pigtail bonded forward scanner is assembled with a footprint of 2 cm by 1.2 cm and a weight of 0.6 g. A forward scanning LiDAR has been built with this new MEMS scanner. The non-resonant scanning capability enables forward-view adaptive resolution and zoom-in scanning capability. [2021-0132]

La voie de l'Itinéraire d’Antonin d’Aginnum (Agen) à Lugdunum (Saint-Bertrand-de-Comminges)

La voie de l'Itinéraire d’Antonin d’Aginnum (Agen) à Lugdunum (Saint-Bertrand-de-Comminges)

Thermal Characteristics Analysis and Verification of Primary Supporting Structure for Spaceborne Camera Based on Low Volume SiC/Al Primary Mirror Frame

Thermal Characteristics Analysis and Verification of Primary Supporting Structure for Spaceborne Camera Based on Low Volume SiC/Al Primary Mirror Frame

Optimization of CNC technology in the manufacturing process of an artistic product

The work analyses the optimisation of the manufacturing process of an artistic wooden product (mirror frame) with a 3-axis CNC machine. The 3D model was first made in ArtCAM, from where the STL file was later uploaded to SolidWorks. The parameters for the HSR (high-speed roughing), and HSM (high-speed machining) operations were determined in SolidCAM. The findings show that a combination of operations from HSR and HSM are the best choice, considering the shape of the model and the capabilities of the machine, as the best ratio between the quality of the surface and the time needed for the operation is provided by these. Operations differ with regard to the tool path and parameters that can be adjusted. The operations were compared and the best results are achieved when the HSR operations “Contour Roughing” and then “Rest Roughing” are used and when the HSM operation “3D Constant Step Over” is used, where the machining time amounted 4 hours and 1 minute. Finally the G code was made for our product.

Quality Control For PT. Straightway Primex With Bayes-Fishbone Metods and Control Chart Analysis

Quality control is a process that essentially renders the entity as the quality reviewer of all the factors involved in the production activity. Quality Control process of each company is a very important thing to do. One method that can be used in the quality control process is Quality Control methods at PT. Straightway Primex. PT. Straightway Primex was established in 1989 is a company that produces photo frames and has 1500 employees. PT. Straightway Primex produces 9 products consisting of wooden frame, shelving, baroque frame, mirror frame, tray, ledges, corbel, and mini furniture and has 19 machines used in the production process to produce the product according to the pre-order customer. The Quality Control division is very influential in the manufacturing process of its production, one of which is timber frame. Quality Control can minimize the defect that occur. The method used is the Bayes-Fishbone method and analyzed the P-control map for the top three defect. Bayes Fishbone used has the highest percent is on the man and machine factor of 30%. Defect on picture frame type OTS 311 size 16 x 20 cm The largest Expresso color is defect less spray amounting to 32.90% with a Defect amount of 101 pieces. Meanwhile, the smallest defect in the photo frame type of OTS 311 size 16 x 20 cm expresso color is defect rupture of 0.65% with 2 pieces of defects.

The effects of mirror frame on shift of attention in depth

The effects of mirror frame on shift of attention in depth

Size Inflation in Drawing From Mirror and Proportional Accuracy in Observational Drawing.

In three experiments, a bias to inflate in drawing the proportion of an image on a mirror over the mirror itself is demonstrated in a sample (N = 146) of undergraduate students taking introductory psychology classes. The inflation is not confined to the image of one's own head but is likely to occur in depictions of any object from a mirror with the mirror frame included. Having to include in the drawing background objects visible in the mirror is found to reduce the inflation. The inflation also diminishes with a smaller mirror and at a longer viewing distance. An account for the inflation in terms of a mechanism of size constancy contingent on selective attention is offered. The size of the inflation suggests a conflation of the perceived mirror image size with the size of the distal object it signals rather than a complete take-over by the latter. The reduction of the size inflation when participants are asked draw both a target and background objects is more likely a result of the selective attention to proportional relationships in the mirror scene, rather than a manifestation of an evenly scaled visual space under distributed visual spatial attention. The implications of the findings to improving proportional accuracy in observational drawing are discussed.

精密电动反射镜架的结构设计与动态特性分析

精密电动反射镜架的结构设计与动态特性分析

Optimization of the HCN interferometer on J-TEXT tokamak

Recently, the HCN interferometer on J-TEXT has been optimized in many aspects. Firstly, the output power of laser source is more stable after using a new designed movable mirror frame and upgrading the oil thermostatic system. Secondly, the electromagnetic interferences have been eliminated by designing a shielding system. Additionally, the signal-to-noise ratio of intermediate frequency (IF) signal has been increased more than five times by improving the detector circuit. The density resolution has been increased from 1×1018 m−3 to 2×1017 m−3 and the sawtooth oscillation has also been measured by the HCN interferometer on J- TEXT after optimizations.

Passive soil heating using an inexpensive infrared mirror design – a proof of concept

Abstract. There is a need to understand the soil system response to warming in order to model the soil process response to predicted climate change. Current methods for soil warming include expensive and difficult to implement active and passive techniques. Here we test a simple, inexpensive in situ passive soil heating approach, based on easy to construct infrared mirrors that do not require automation or enclosures. The infrared mirrors consisted of 61 × 61 cm glass panels coated with infrared reflecting film. The mirrors as constructed are effective for soil heating in environments typified by an open vegetation canopy. Mirror tests were performed on three soils of varying texture, organic matter content, and heat capacity in a warm semi-arid environment. Results indicated that the infrared mirrors yielded significant heating and drying of soil surface and shallow subsurface relative to unwarmed control treatments, and that warming and drying effects were soil specific with greater potential warming on soils with lower volumetric heat capacity. Partial shading from the mirror frame did produce periods of relative cooling at specific times of the day but overall the mirrors yielded a net soil warming. The results demonstrate proof of concept that the infrared mirrors may be used to passively heat the near soil surface, providing an inexpensive, low-maintenance alternative to other passive and active soil heating technologies.

Beam-clipping-induced diffraction effects in MEMS laser scanners for autostereoscopic outdoor displays

In micro-electro-mechanical systems (MEMS) laser scanners, the beams reflected by the micromachined mirror may be truncated at various edges in the system, e.g., due to finite size of the reflective mirror surface, at the rigid supporting mirror frame, and at the package of the light source. In this paper the joint effect of such individual beam clipping is described by introducing a so-called effective system aperture. Diffraction effects induced by this virtual aperture are analyzed by means of Fourier optics incorporating the Fraunhofer far field approximation. The beam clipping theory is then applied to a laser light module with integrated MEMS mirror for autostereoscopic outdoor displays. Employing an optimization of the MEMS mirror tilting angle with respect to the laser light source, the beam-clipping-induced diffraction effects are minimized.

A New Find of Lead Mirror Frames from Rit (Viminacium)

A New Find of Lead Mirror Frames from Rit (Viminacium)

Simulation Analysis on Dynamic Characteristics of a Quad Intergrated Mirror Frame

The “SG” is a large inertial confinement fusion (ICF) project that is building in china. Its essential working principium is stimulating the nuclear material in the target ball by shooting with laser, then the ICF will produce large numbers of fusion energy which is controllable. The laser is lead and transmited primary by mirror which is clamped by mirror frame in the shooting range system.For the needs of precision when shooting, there are some strict demands to the dynamic characteristics of the mirror frame. This paper designed a machine model of a array mirror frame which is quad intergrated, and simulation analysis on dynamic characteristics of the mirror frame .