Science method

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Publications related to CNC (10,000)
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Article
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Water contamination due to the artificial dyes from domestic and industrial wastewater is one of the most crucial environmental issues and problems that the use of an effective adsorbent for dye adsorption seems necessary. In the present study, calcium alginate hydrogels reinforced with cellulose nanocrystals (CA/CNC) as a green and cost-effective...
Article
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Over past few decades, adoption of different Additive Manufacturing (AM) processes has gained momentum in the manufacturing industry. One such emerging AM process is wire-based directed energy deposition. Environmental impacts and cost are important criteria for adoption of any manufacturing process. Therefore, the aim of this paper is to evaluate...
Article
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This study explores the development of nontoxic biocomposite films from methylcellulose (MC) and crystalline nanocellulose (CNC). First, a methylcellulose sample (Tylose MH 50) of concentration 1.5% (w/w) and crystalline nanocellulose type-1 samples of different concentrations were prepared to obtain these biocomposite films. Films were then produc...
Article
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Batik Kawung is one of the most popular batik patterns in Indonesia. This pattern can be displayed as an attractive and artistic ornament of ceramic plate products. This ornament can increase the selling value and storytelling of the product. Computer-based virtual design and manufacturing (VDM) technology is used to produce Kawung batik patterns t...
Preprint
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Farm Bot “RERE” is a wheeled robot which is developed to monitor ready-to-harvest melon fruit in a greenhouse. Some features, grouped into input and output devices, which are temperature and humidity sensor HTU, proximity sensor, APDS sensor, buzzer, RGB Led, ESP32CAM have been fabricated. Whole circuits except the ESP32CAM are self-designed to mee...
Article
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Turbine blades, mainly formed by investment casting, are one of the core components of an aero-engine. However, the profile accuracy of turbine blades shaped by investment casting sometimes cannot directly meet the design requirements, and there will be some local areas exceeding the given form tolerance. In order to reduce the blade rejection rate...
Article
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Background Chemotherapy-induced alopecia (CIA), although generally reversible, is felt as extremely distressing by patients with breast cancer. A certified medical device (Capelli Naturali a Contatto ® —CNC ® ) was produced to provide patients with a personalized scalp prosthesis, reproducing the patient’s original hair, resistant to any type of ev...
Article
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Metaller, plastik, odun ve kompozit malzemeler önemli mühendislik malzemeleridir. Bu malzemeler CNC (bilgisayarlı sayısal kontrol) torna, CNC dik işleme merkezi, CNC freze ve CNC router gibi CNC makineleri kullanılarak şekillendirilmektedir. Mobilya fabrikalarında, CNC router makineleri yoğun bir şekilde orta yoğunlukta lif levha (MDF) yüzeylerinin...
Article
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The article discusses the technology capabilities of multi-purpose CNC machines, and possible options for implementing parallel multi-tool processing. It was revealed that the technological capabilities of these machines are used at best by 50% in factories. This is due to the lack of recommendations for the design and use of such adjustments for...
Article
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In the article it is developed a full-factorial model of the scattering field of the multi-tool machining dimen�sions performed on modern multi-tasking machines with CNC turning group to take into account the angular dis�placements of the workpiece when machining parts with prevailing overall dimensions. Based on the obtained model, it is possible...
Article
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Background Profiling the plant root architecture is vital for selecting resilient crops that can efficiently take up water and nutrients. The high-performance imaging tools available to study root-growth dynamics with the optimal resolution are costly and stationary. In addition, performing nondestructive high-throughput phenotyping to extract the...
Article
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Poly(lactic acid) (PLA) undergoes degradation through the action of microorganisms and enzymes that can degrade it by composting. The goal of this work was to observe the degradation/disintegration behavior in garden soil of neat PLA and PLA composites with 3 wt% cellulose nanocrystals (CNC) modified or not with non-ionic surfactants (S) at a weigh...
Article
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This work investigated the extraction of spherical cellulose nanocrystal (spherical CNC) from cotton cloth waste (CCW) using sulfuric acid without ultrasound treatment during the hydrolysis process, producing a yield of 31%. The cellulose was first extracted through alkali, decoloring, and hydrochloric acid treatment. Then the cellulose was hydroly...
Article
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Several basic leucine zipper (bZIP) transcription factors have accessory motifs in their DNA-binding domains, such as the CNC motif of CNC family or the EHR motif of small Maf (sMaf) proteins. CNC family proteins heterodimerize with sMaf proteins to recognize CNC–sMaf binding DNA elements (CsMBEs) in competition with sMaf homodimers, but the functi...
Article
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O acetato de celulose (AC) é um polímero biodegradável hidrofóbico, derivado da celulose. Os biopolímeros geralmente apresentam desempenhos inferiores em relação aos polímeros derivados de petróleo. Dessa forma nanocristais de celulose (CNC) têm sido usados como reforço, para melhorar as suas propriedades. Atualmente as embalagens ativas com sistem...
Article
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The present paper presents a relatively new technology called rotary broaching for processing external and internal profile surfaces –. The technology can be implemented on lathes (turning centers, multi-task machines) and milling machines with CNC, using a special holder with a tool having the geometry of the processed profile surface installed on...
Article
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We have in this paper investigated how water sorbs to cellulose. We found that both cellulose nanofibril (CNF) and cellulose nanocrystal (CNC) films swell similarly, as they are both mainly composed of cellulose. CNF/CNC films subjected to water at 0.018 kg/m3 at 25 °C and 39 °C, showed a decrease in swelling from ~ 8 to 2%. This deswelling increas...
Article
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The article deals with developing a parametric (macro) program for processing a chain wheel for bush-roller chains. The parametric program is developed for CNC Fanuc and implemented in the production process for the chain wheel family. To develop the parametric program, the dependences for constructing the tooth profile are used: chain pitch and a...
Article
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This study aims to present the effects of cutting parameters on cutting tool wear during turning process of material Inconel 625 using Taguchi experimental design. Taguchi L9 orthogonal array was used to investigate the effects of machining parameters. Optimal cutting conditions are determined using the signal/noise (S/N) ratio which is calculated...
Article
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Vibration monitoring of CNC high-speed machining (HSM) centers under non-stationary conditions, characterized by varying operating parameters and uncertainties affected by the change of speed and load during operation currently presents a particular challenge. Therefore, bearing condition monitoring is important. Indeed, this variation has a consid...
Article
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Se presenta el diseño mecánico de una máquina herramienta de Control Numérico Computarizado (CNC) de 5 ejes para aprendizaje y uso en centros de maquinado. En la actualidad, el uso de máquinas CNC en la industria se vuelve popular, y el uso de centros de maquinado de 5 ejes se encuentra en crecimiento por su capacidad de maquinar piezas de mayor ca...
Article
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Nuclear factor erythroid 2-related factor 2 (Nrf2) is a master regulator of the endogenous antioxidant response to reactive oxygen species as well as a controller of Phase II detoxification in response to xenobiotics. This amenity to specific external manipulation exploits the binding affinity of Nrf2 for its constitutive repressor and degradation...
Article
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Novel pectin-based films reinforced with crystalline nanocellulose (CNC) and activated with zinc oxide nanoparticles (ZnO NPs) were prepared by solvent-casting method. Film ingredients enhanced UV-blocking, thermal, and antibacterial properties of active films against well-known foodborne pathogens. Optimal active films exhibited higher mechanical,...
Article
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The main drawback of cellulose nanocrystals (CNCs) obtained by conventional sulphuric acid hydrolysis is their low thermal stability in consequence of pyrolysis catalyzed by sulfo-groups on the CNC surface. Replacement of surface sulfo-groups by carboxyl groups as a result of oxi-dation allows the thermal stability of CNCs to be enhanced significan...
Article
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This paper evaluates a type of geopolymer concrete that uses hemp fibres as a natural aggregate due to the various advantages offered by these woody materials. These advantages include ease of cultivation and processing and their use in the essential structure of concretes used for green construction purposes. The sampling study was prepared using...
Preprint
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Cellulose that has been acid hydrolyzed is what makes up cellulose nanocrystals (CNC). Due to CNCs biodegradability, renewability, sustainability, and mechanical properties, they have a wide range of applications in the biomedical, photonics, and material engineering fields. Rheology, or the flow behaviour of CNC dispersion, is integrally tied to t...
Article
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Penelitian ini merupakan penelitian kuantitatif yang bertujuan untuk mengetahui pengaruh praktik kerja industri terhadap persiapan kerja di era e-Learning di Jurusan Pendidikan Teknik Mesin Universitas Negeri Makassar. Studi ini melihat bagaimana praktik kerja industri mempengaruhi kesiapan kerja di era e-learning. Populasi penelitian ini adalah ma...
Article
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Penelitian ini adalah penelitian tindakan kelas (Classroom Action Researsch) yang bertujuan untuk Mengetahui Apakah Penerapan Pembelajaran Berbasis Job Sheet Dapat Meningkatkan Keterampilan Memfrais CNC (CNC Milling Skill) Siswa Kelas XII SMK Negeri 5 Makassar. Subyek penelitian ini adalah peserta didik kelas XII Teknik Pemesinan SMK Negeri 5 Makas...
Article
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The increasing demands of highly precise industrial products lead to continuous seeking for the improvements in cabapility of manufacturing machines, i.e., machine tools. Machine tools include different types of manufacturing machines, i.e., turning, lathe, drilling, and milling machines whatever computerized numerical control (CNC) type or manual...
Article
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Online determination of a cutter's health status is crucial for the attainment of condition‐based automated tool change in computer numerically controlled (CNC) machining. Due to the impracticalities associated with direct condition measurements, data‐based modeling of monitoring signals provides a viable practical route. However, the highly noisy...
Article
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Currently, pineapple processing is a primarily manual task, with high labor costs and low operational efficiency. The ability to precisely detect and locate pineapple eyes is critical to achieving automated pineapple eye removal. In this paper, machine vision and automatic control technology are used to build a pineapple eye recognition and positio...
Preprint
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Natural cellulose, a sustainable bioresource, is highly abundant in nature. Cellulosic materials, particularly those that explore and employ such materials for industrial use, have recently attracted significant global attention in the field of material science because of the special properties of cellulose. The hydroxyl groups enable the formation...
Article
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Surface modifications of cellulose nanomaterials can be used to tailor their surface charge and hydrophilicity-hydrophobicity characteristics. Additionally, it can facilitate the selective interaction of nanocelluloses with other solid particles to further expand their applicability in different fields. For instance, cellulose nanocrystals (CNC) wi...
Article
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Backgrounds Rheumatoid arthritis (RA) is a chronic inflammatory and autoimmune disease. Current studies suggest that long noncoding RNAs (lncRNAs) may be key regulators in pathogenesis. Methods Analyzed lncRNAs and mRNAs using microarrays to find key differentially expressed lncRNAs in RA. GO and KEGG enrichment analysis together with coding non-c...
Article
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Mesin CNC merupakan mesin yang dilengkapi dengan sistem mekanik dan kontrol berbasis computer. Sebagai teknologi manufactur yang memiliki kualitas produksi yang tinggi, mesin CNC memerlukan kualitas listrik yang baik demi menjaga konsistensinya dalam proses produksi dan keawetan komponen mesin, untuk itu diperlukan pengukuran kualitas Energi listri...
Article
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Background The preservation of biological and physiological vitality as well as the formation of dentin are among the main tasks of human dental pulp for a life time. Odontoblastic differentiation of human dental pulp stem cells (hDPSCs) exhibits the capacity of dental pulp regeneration and dentin complex rebuilding. Exploration of the mechanisms r...
Article
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Taking into account the development trends of Industry 4.0, the task of improving human-machine interfaces is becoming increasingly important. The development of user-friendly interfaces for interaction between the operator and the equipment is one of the most difficult tasks in the creation of specialized technological systems. The operator panel...
Article
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In nanoscience, nanotechnology is applied to various technologies, and research is actively being conducted. As the application of multi-walled carbon nanotubes (MWCNTs) in various fields increases, efforts have been made to develop dispersion and functionalization technologies. In order to effectively use MWCNT nanofluids, it is most important to...
Article
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Balancing physicochemical properties and sensory properties is one of the key points in expanding edible packaging applications. The work consisted of two parts, one was to investigate the effects of cellulose nanocrystals (CNC) on the packaging-related properties of whey protein isolate films with natural colorants (curcumin, phycocyanin, and lyco...
Article
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The self-assembly of cellulose nanocrystals can tether their interfacial interactions and the associated properties of their constructs. For instance, assemblies of highly aligned cellulose nanocrystals (CNCs) bear improved mechanical strength, barrier properties, and piezoelectric response. In this study, the self-assembly of CNC superstructure wa...
Article
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A damping model is developed based on the mechanism of interfacial interaction in nanoscale particle reinforced composites. The model includes the elasticity of the materials and the effects of interfacial adhesion hysteresis. Specific results are given for the case of bio-based PA610 polyamide reinforced by nanocrystalline cellulose (CNC), based o...
Article
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Among plastic items, single‐use straws are particularly detrimental to marine ecosystems because such straws, including those made of poly(lactic acid) (PLA), are sharp and extremely slowly degradable in the ocean. While paper straws are promising alternatives, they exhibit hydration‐induced swelling even when coated with a non‐degradable plastic c...
Article
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In a series of Pt(II) complexes [Pt(dba)(L)] containing the very rigid, dianionic, bis-cyclometalating, tridentate C^N^C2‒ heterocyclic ligand dba2– (H2dba = dibenzo[c,h]acridine), the coligand (ancillary ligand) L = dmso, PPh3, CNtBu and Me2Imd (N,N’-dimethylimidazolydene) was varied in order to improve its luminescence properties. Beginning with...
Article
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Guided waves have attracted significant attention for non-destructive testing (NDT) and structural health monitoring (SHM) due to their ability to travel relatively long distances without significant energy loss combined with their sensitivity to even small defects. Therefore, they are commonly used in damage detection and localization applications...
Article
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Wire cut electrical discharge machining (EDM) equipment is run by computer numerically controlled (CNC) instruments and it is widely used in various industries such as aerospace, medical, and electronics. Thus, producing tight corners or very intricate patterns, wire EDM’s increased precision allows for intricate patterns and cuts. Not only dimensi...
Article
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Recently, considerable interest has been focused on developing greener and biodegradable materials due to growing environmental concerns. Owing to their low cost, biodegradability, and good mechanical properties, plant fibers have substituted synthetic fibers in the preparation of composites. However, the poor interfacial adhesion due to the hydrop...
Article
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Tendon and ligament traumatic injuries are among the most common diagnosed musculoskeletal problems. Such injuries limit joint mobility, reduce musculoskeletal performance, and most importantly, lower people’s comfort. Currently, there are various treatments that are used to treat this type of injury, from surgical to conservative treatments. Howev...
Article
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In this work, shape-customized scaffolds based on waterborne polyurethane-urea (WBPUU) were prepared via the combination of direct ink writing 3D-printing and freeze-drying techniques. To improve the printing performance of the ink and guarantee a good shape fidelity of the scaffold, cellulose nanocrystals (CNC) were added during the synthesis of t...
Article
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The poor water solubility, large particle size, and low accessibility of cellulose, the most abundant bioresource, have restricted its generalization to carbon dots (CDs). Herein, nitrogen and sulfur co-doped fluorescent carbon dots (N, S-CDs) were hydrothermally synthesized using cellulose nanocrystals (CNC) as a carbon precursor, exhibiting a sma...
Conference Paper
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The production of parts on CNC machines is one of the most common techniques used in modern manufacturing processes. CAM software generates NC programs that are mathematically exact and usually contain constant cutting parameters for a particular tool path and does not simulate the expected machined part quality (accuracy of machinning and the mach...
Article
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Titanium Alloy is one of the most extensively used alloys, based on light weight and high strength of materials, it is used in an aerospace engine, mainly in the gas turbine compartment. Machining is a requisite operation in the aircraft industries for the manufacturer of the components especially for gas turbines. In this work, the second order qu...
Article
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Cold damage has caused more economic losses to fruit crop growers in the U.S. than any other weather hazard, making it a perennial concern for producers. Cellulose nanocrystals (CNCs) represent a new generation of renewable bio-nanomaterials, with many unique physical and chemical properties, including their low thermal conductivity. Our team has d...
Article
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En este trabajo, se presenta la construcción de una máquina CNC láser para aplicaciones de grabado, a partir de la modificación de una máquina router. El diseño de su estructura y componentes, así como el modelo y ensamble en 3D, se realizó por medio de SolidWorks; las piezas diseñadas fueron fabricadas a través de impresión 3D, empleando material...
Preprint
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This paper presents the phenomenon of inducing a secondary structure of amorphous carbon on the nitrogen-implanted surface of WC-Co cutting tools during particleboard machining. Nitrogen ion implantation was performed for two types of WC-Co tools (indexable knives for milling heads and circular saw blades). The following parameters of the ion impla...
Preprint
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The bioblitz phenomenon has recently branched into cities, presenting exciting opportunities for local governments to channel participants' efforts toward local issues. The City Nature Challenge (CNC) is one such initiative that has been quickly uptaken by hundreds of municipalities worldwide. Despite high participation, we still lack a framework f...