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Journal articles on the topic 'Needle parameters'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Voronov, V. P., and M. I. Sedykh. "Cutting parameters at needle-milling." Izvestiya MGTU MAMI 3, no. 2 (2009): 192–95. http://dx.doi.org/10.17816/2074-0530-69687.

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In article is open the questions wire brash, its specific and advantage in comparison with other ways of performance of operations of preparation of surfaces of preparations for anticorrosive covering of metal, welding by explosion etc. In article are consider еhe questions of the basic parameters of cutting at wire brash and on what they depend, and as a choice of modes of cutting, their influence on quality of a surface and productivity of process.

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Serguntsov, Alexander, Victoria Serguntsova, and Nikolai Malashikhin. "Operational parameters and modes of rotary working body for harrowing crops." E3S Web of Conferences 126 (2019): 00023. http://dx.doi.org/10.1051/e3sconf/201912600023.

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A rotary working body with evenly spaced needles along perimeter is a flat disk (rotating in longitudinal–vertical plane). The technological process of interaction with soil is that when rolling rotary disk in soil layer, needle is introduced into it, crushing and shifting soil in direction of rotation. The degree of soil loosening of freely rotating needle disk on axis in longitudinal–vertical plane depends on several parameters: diameter of a disk, number and shape of needles, speed of progressive motion, soil properties. There was made an analytical research of needle working bodies in term

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3

Mashroteh, Hasan, and Mohammad Zarrebini. "Multivariate Regression Modeling of Parameters Affecting Punching Force during Random Velour Needling." Journal of Engineered Fibers and Fabrics 10, no. 2 (2015): 155892501501000. http://dx.doi.org/10.1177/155892501501000211.

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Manufacturing of random velour needled fabrics comprises two separate needling operations. In the first stage a carded fibrous assembly is consolidated using a barbed needle. The consolidated assembly is opened-up due to action of fork needles of the second needling stage. In this special needling operation the mono-structure consolidated fibrous assembly is converted to a bi-structure fibrous assembly, comprised of base and pile layers. The extent of imparted structural changes influences physical and mechanical properties of the resultant random velour fabric. Fork needles which are the culp

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4

Rehling, Dennis, Jan Liu, Kent W. Stewart, Peter P. Pott, and Frank Schiele. "Investigation of vibration parameters for needle insertion force reduction." Current Directions in Biomedical Engineering 6, no. 3 (2020): 608–11. http://dx.doi.org/10.1515/cdbme-2020-3155.

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AbstractMany medical interventions in therapy and diagnostics require needle insertion into tissue. Common complications such as increased pain and formation of haematoma are caused by wrong needle positioning. It has been shown that pain experience and needle positioning can be improved by a reduction of insertion force, which can be achieved by vibrating the needle axially. An experimental setup has been designed to investigate the influences of different combinations of vibration frequencies (10, 100, and 200 Hz) and vibration amplitudes (20, 100, and 500 μm) during needle insertion into th

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Eimil-Fraga, Cristina, Federico Sánchez-Rodríguez, Esperanza Álvarez-Rodríguez, and Roque Rodríguez-Soalleiro. "Relationships between needle traits, needle age and site and stand parameters in Pinus pinaster." Trees 29, no. 4 (2015): 1103–13. http://dx.doi.org/10.1007/s00468-015-1190-7.

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6

Tausz, Michael, Günther Zellnig, Edith Bermadinger-Stabentheiner, Dieter Grill, Klaus Katzensteiner, and Gerhard Glatzel. "Physiological, structural, and nutritional parameters of Norway spruce needles from declining forest stands in Austria." Canadian Journal of Forest Research 26, no. 10 (1996): 1769–80. http://dx.doi.org/10.1139/x26-201.

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Decline phenomena in two spruce (Piceaabies (L.) Karst.) forests in different locations in Austria are described on a biochemical and ultrastructural level. Needles of declining trees (canopy state class 3 or 4, more than 40% needle loss, and visible needle chlorosis) are characterized by loss in chlorophylls, xanthophylls, and carotenes in older needles, with α-carotene and chlorophyll a showing strongest depressions. Total chlorophyll concentrations in visibly yellowed needles range below 1 mg•g−1 dry weight, whereas green needles contain more chlorophyll. All trees included in this study fi

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Serguntsov, Alexander, and Victoria Serguntsova. "Optimization of parameters and operating modes of the rotary working body for harrowing agricultural crops." E3S Web of Conferences 193 (2020): 01021. http://dx.doi.org/10.1051/e3sconf/202019301021.

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The rotary working body with evenly spaced needles along the perimeter is a flat disk (rotating in a longitudinally vertical plane). The technological process of interaction with the soil consists in the fact that when the rotary disk is rolled in the soil layer, the needle is inserted into it, crushing and shifting the soil in the direction of rotation. The degree of soil loosening, rotating freely in a longitudinal vertical plane of the needle disk on the axis depends on several parameters: disk diameter, number of needles, speed, and soil properties. An experimental study of needle working

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8

Mvubu, Mlando, Asis Patnaik, and Rajesh D. Anandjiwala. "Process Parameters Optimization of Needle-punched Nonwovens for Sound Absorption Application." Journal of Engineered Fibers and Fabrics 10, no. 4 (2015): 155892501501000. http://dx.doi.org/10.1177/155892501501000415.

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This paper reports a study on the optimization of process parameters of needle-punched nonwoven fabrics for achieving maximum sound absorption by employing a Box-Behnken factorial design. The influence of fiber type, depth of needle penetration, and stroke frequency on sound absorption properties were studied. These parameters were varied at three levels during experimental trials. From multiple regression analysis, it was observed that the depth of needle penetration alone was the most dominant factor among the selected parameters, which was followed by the interaction between depth of needle

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Messiry, Magdi El, Affaf K. Al-Oufy, Yasmin Ayman, and Samar Abdel Latif. "Statistical analysis of the effect of processing machine parameters on acoustical absorptive properties of needle-punched nonwovens." Journal of Engineered Fibers and Fabrics 18 (January 2023): 155892502311556. http://dx.doi.org/10.1177/15589250231155623.

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The object of this paper is to investigate the acoustic insulation properties of needle-punched nonwovens produced from recycled polyester waste blended with virgin polyester serving as supportive material. The research work also studies the effect of different processing parameters of needle punching nonwoven machines through the investigation of different needle speeds, lattice speeds, and penetration depths. Throughout the research work, several needles punched nonwoven fabrics were produced under different conditions as follows: Three needle speeds were applied: 280, 245, and 227 rpm. Thre

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10

Haghighat, Ezzatollah, Seyed Mohammad Etrati, and Saeed Shaikhzadeh Najar. "Evaluation of Woven Denim Fabric Sewability based on Needle Penetration Force." Journal of Engineered Fibers and Fabrics 9, no. 2 (2014): 155892501400900. http://dx.doi.org/10.1177/155892501400900206.

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This paper investigates the sewability of the woven denim fabrics based on needle penetration force (NPF). For this purpose, the effects of fabric weight, number of fabric layers, needle size, and the interaction effect of these parameters on NPF in twill denim fabrics were investigated. In addition, the influence of weave pattern on NPF was studied. The statistical analysis results show that NPF is influenced by these parameters. Fabric weight has a greater effect on NPF than other parameters. With increasing fabric weight, number of fabric layers, and needle size, the NPF increases. The tren

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11

Lee, Jong Young, Ji Yeon Son, Soon Woo Park, Eung Chun Lee, and Doohie Kim. "Weighted Needle Pinprick Sensory Threshold (WPT) and Arthropornetric Parameters." Korean Journal of Occupational and Environmental Medicine 6, no. 2 (1994): 342. http://dx.doi.org/10.35371/kjoem.1994.6.2.342.

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12

Donnelly, Amber, Maheswari Mukherjee, Salma A. Alrabghy, et al. "Scanning Parameters for Thyroid Fine Needle Aspiration Cytology Specimens." Journal of the American Society of Cytopathology 2, no. 1 (2013): S80—S81. http://dx.doi.org/10.1016/j.jasc.2013.08.216.

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13

Tarasov, Natal’ya V., and Natal’ya V. Gerling. "Needle-Like Leaf Organs of Conifers. Part I. Modeling the Needle Cross-Section Perimeter." Lesnoy Zhurnal (Forestry Journal), no. 3 (June 10, 2024): 73–91. http://dx.doi.org/10.37482/0536-1036-2024-3-73-91.

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Despite the availability of measuring systems for estimating the surface area of leaf organs of higher plants, the need for simple standard methods for determining this indicator area remains relevant for plant physiologists. The methods for estimating the surface area of needle-like leaf organs of conifers, based on the geometry of an individual needle rest on the general principle of calculating the needle surface area as the product of its length by the perimeter of its cross-section. This makes the cross-section perimeter one of the most important parameters needed to characterize the need

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14

Fadhil, Wasan Adeeb, Hanaa K. Essa, Hiba S. Rasheed, and Tariq J. Alwan. "Optical parameters of PANI.CSA/PMMA nanofibers." Journal of Physics: Conference Series 2857, no. 1 (2024): 012002. http://dx.doi.org/10.1088/1742-6596/2857/1/012002.

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Abstract Polyaniline doped with camphor sulphonic/Poly(methyl methacrylate) PANI.CSA/PMMA nanofibers were manufactured by electrospinning technology, where all parameters of the electrospinning system are fixed and the effect of the needle gauge on the properties of the prepared nanofibers is studied at different needle gauge (18, 20, 23 G). The polyaniline was manufactured by aniline-chemical oxidation polymerization. The nanofibers were diagnosed by an FE-SEM scanner to identify the surface morphology of the samples and the diameters of the nanofibers, it shows that nanofibers become more re

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15

Aliakberov, Il'fat, Sergey Yakhin, and Lenar Nuriev. "DESCRIPTION OF THE PARAMETERS OF THE ELLIPSE NEEDLE DISC OF THE SOIL PROCESSING TOOL." Vestnik of Kazan State Agrarian University 16, no. 2 (2021): 65–69. http://dx.doi.org/10.12737/2073-0462-2021-65-69.

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Due to the well-known advantages, rotary tillage implements are widely used in the cultivation of many agricultural crops. Structurally, the working units of rotary implements are located (installed) on the frame, as a rule, sequentially one after the other. This reduces the maneuverability of the tillage unit, increases the material consumption of the implement and the energy consumption of the technological operation. In the rotary tillage tool developed at Kazan State Agrarian University for pre-sowing soil cultivation, these disadvantages are eliminated by installing a spiral-screw working

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16

Gao, De Dong, and Hao Jun Zheng. "Simulation for Needle Deflection and Soft Tissue Deformation in Needle Insertion." Advanced Materials Research 139-141 (October 2010): 889–92. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.889.

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Needle deflection and soft tissue deformation are the most important factors that affect accuracy in needle insertion. Based on the quasi-static thinking and needle forces, an improved virtual spring model and a finite element method are presented to analyze needle deflection and soft tissue deformation when a needle is inserted into soft tissue. According to the spring model, the trajectory of the needle tip is calculated with MATLAB using different parameters. With the superposed element method, the two and three dimensional quasi-static finite element models are created to simulate the dyna

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17

Ting, Cai, Deng Yong, and Yi Dan Zhou. "Simulation and Analysis of Fuel Injector Needle Closing Time." Advanced Materials Research 341-342 (September 2011): 580–85. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.580.

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The objective of this paper is to analyze the closing time of fuel injector needle in electronic fuel injection system. The dynamics model and hydraulic simulation in AMESim software help to find the three critical parameters and the relationships between these three parameters and the needle closing time. Results show three directions to reduce the closing time of injector needle to meet the system requirements.

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18

Seyam, Abdelfattah M. "Applications of On-Line Monitoring of Dynamic Forces Experienced by Needles during Formation of Needled Fabrics." International Nonwovens Journal os-8, no. 2 (1999): 1558925099OS—80. http://dx.doi.org/10.1177/1558925099os-800219.

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The significance of a recently developed system that measures dynamic forces experienced by individual needles during formation of needlepunched fabrics is demonstrated. The system design, coupled with a new signal analysis technique allows measurement of peak penetration and stripping forces as well as the penetration and stripping energies due to needle/fiberweb interaction. Systematic experimental investigations were conducted to determine the critical locations in the needle board where needles experience the highest forces, and correlate needle force parameters to fabric performance. The

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Seyam, Abdelfattah M. "Applications of On-Line Monitoring of dynamic Forces Experienced by Needles during Formation of Needled Fabrics." International Nonwovens Journal os-8, no. 2 (1999): 1558925099OS—80. http://dx.doi.org/10.1177/1558925099os-800220.

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The significance of a recently developed system that measures dynamic forces experienced by individual needles during formation of needlepunched fabrics is demonstrated. The system design, coupled with a new signal analysis technique allows measurement of peak penetration and stripping forces as well as the penetration and stripping energies due to needle/fiberweb interaction. Systematic experimental investigations were conducted to determine the critical locations in the needle board where needles experience the highest forces, and correlate needle force parameters to fabric performance. The

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20

Al-Ibraheemi, Alyaa, Tiffany Pham, Lei Chen, et al. "Comparison Between 1-Needle Technique Versus 2-Needle Technique for Bone Marrow Aspiration and Biopsy Procedures." Archives of Pathology & Laboratory Medicine 137, no. 7 (2013): 974–78. http://dx.doi.org/10.5858/arpa.2012-0046-oa.

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Context.—Bone marrow examination is essential for diagnosis and staging of hematologic disorders. Traditionally, the bone marrow biopsy and aspirate are obtained with 2 needles at 2 separate sites. This approach is associated with significant discomfort, procedural time, and occasionally, morbidity. Although previous observations had suggested that a single-needle technique at one site is a simpler and less-painful procedure, there had been concern that the 1-needle technique may yield a suboptimal biopsy for diagnosis. Objective.—To conduct a systematic comparison of multiple parameters of bo

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21

Long, H. R. "The Effect of the Shape and Parameters of the Knitting Needle on Cam-to-needle Impact Forces." Journal of the Textile Institute 91, no. 2 (2000): 259–67. http://dx.doi.org/10.1080/00405000008659504.

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22

Zhang, Chi, Xiao Guang Wu, and Yi Wang. "Analysis on the Mechanics Model of the Electromagnetic Permanent Magnetic Knitting Needle." Applied Mechanics and Materials 635-637 (September 2014): 290–93. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.290.

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Based on the needle selection principle and requirements for hybrid magnetic type of driving knitting needles, this paper puts forward the mechanical model for the knitting needles of magnetic suspension drive mode. This paper analyzes the force model of the knitting needle by establishing the relationship between the magnetic force and the air gap. It also researches stress and strain for the knitting needle by using the finite element method. All these results will provide guidance for the optimal design of the knitting needle and parameters design of the key components like the needle cylin

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23

Yu, Bin, Xiaoming Zhao, Yuening Zeng, and Dongyue Qi. "The influence of process parameters on needle punched nonwovens investigated using image analysis." RSC Advances 7, no. 9 (2017): 5183–88. http://dx.doi.org/10.1039/c6ra25474h.

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The influence of process parameters on the fiber distribution and straight segment fiber length of needle punched nonwovens was investigated. Optimum parameters to prepare needle punched nonwovens based on preoxidized polyacrylonitrile were obtained.

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Sobolev, A. N., P. A. Feklistov, A. V. Gryazkin, and O. I. Gavrilova. "Assimilation apparatus peculiarities of isolated pine populations (Bolshoy Solovetsky island)." FORESTRY BULLETIN 27, no. 5 (2023): 74–81. http://dx.doi.org/10.18698/2542-1468-2023-5-74-81.

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The study results of the assimilation apparatus in the populations of Scots pine (Pinus sylvestris) and Shore pine (Pinus contorta) isolated from the mainland on the Bolshoy Solovetsky Island are presented. Three sites of bilberry pine forest of natural origin, Shore pine and Scots pine in bilberry habitat conditions are presented. Scots pine needle parameters were determined in the pine forest of natural origin and in the cultures of Shore pine. It was revealed that the parameters of the average needle in the natural pine forest and in cultures (Scots pine) are quite similar. The mass of the

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Schmitt, Sebastian, Katharina Skopnik, and Heinrich Martin Overhoff. "Measurement of needle susceptibility artifacts in magnetic resonance images." Current Directions in Biomedical Engineering 1, no. 1 (2015): 198–200. http://dx.doi.org/10.1515/cdbme-2015-0050.

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AbstractThe success of minimally invasive procedures under MR-guidance can be increased by the knowledge of the current needle pose. We hypothesize that a one-toone mapping exists between the needle orientation with respect to the static magnetic field and the cross-sectional shape of the needle’s susceptibility artifact. For this purpose, we derived a mathematical model, which describes the cross sectional geometry of the needle artifact. It is approximated by two ellipses. Certain parameters of these ellipses can be utilized for mapping the geometry of the needle artifact onto the needle ori

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Lupu, Iuliana G., Oana Cramariuc, Horatiu I. Hogas, and Liliana Hristian. "Parameters optimization for the production of needle-punched nonwoven agrotextiles." Journal of the Textile Institute 104, no. 10 (2013): 1125–31. http://dx.doi.org/10.1080/00405000.2013.777581.

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Đorđević, Miodrag, Viktorija Stanković, and Ana Ilić. "Determination of yarn length in a loop based on the technological parameters of the machine." Tekstilna industrija 68, no. 3 (2020): 10–14. http://dx.doi.org/10.5937/tekstind2003010d.

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Yarn length in a loop is one of the most important technological parameters in knitwear structure analysis. Therefore, determination of the accurate values of yarn length in a loop is of great importance in knitwear structure parameters projection. This paper presents comparative results of the determination of yarn length in a loop based on the loop row height, loop row width and calculated yarn diameter, as well as determination of loop length based on machine technological parameters taking into account needle pace, platinum and needle diameter, platinum and needle curved radius, span angle

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Nachimowicz, Jerzy, and Robert Korbut. "The Influence of Geometrical Parameters on the Friction Process in the Needle Bearing." Key Engineering Materials 490 (September 2011): 288–95. http://dx.doi.org/10.4028/www.scientific.net/kem.490.288.

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The article analyses the process of friction in the needle bearing as the function of the alterations of geometrical parameters, namely the diameter of the shaft – D, the needle – d and the bearing clearance. The change in the relation between the diameters D and d results in the change of the contact area of the friction pair; in the case of two shafts with parallel axes (the needle of the bearing and the shaft pin) the contact area, if compared with the analogical process in the ball bearing, alters significantly and leads to resistance in motion. There are two types of friction in the needl

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Chelales, Erika, Katriana von von Windheim, Arshbir Singh Banipal, et al. "Determining the Relationship between Delivery Parameters and Ablation Distribution for Novel Gel Ethanol Percutaneous Therapy in Ex Vivo Swine Liver." Polymers 16, no. 7 (2024): 997. http://dx.doi.org/10.3390/polym16070997.

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Ethyl cellulose–ethanol (ECE) is emerging as a promising formulation for ablative injections, with more controllable injection distributions than those from traditional liquid ethanol. This study evaluates the influence of salient injection parameters on forces needed for infusion, depot volume, retention, and shape in a large animal model relevant to human applications. Experiments were conducted to investigate how infusion volume (0.5 mL to 2.5 mL), ECE concentration (6% or 12%), needle gauge (22 G or 27 G), and infusion rate (10 mL/h) impacted the force of infusion into air using a load cel

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BARI, ABDUL, Dr Jamil Ahmed Mirza, AHSAL-UL WADOOD, and KHAWAJA FAROOQ QASIM. "FINE NEEDLE ASPIRATION CYTOLOGY." Professional Medical Journal 14, no. 02 (2007): 237–40. http://dx.doi.org/10.29309/tpmj/2007.14.02.4882.

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Introduction: Lymph nodes are frequently enlarged in children in a widespectrum of diseases, some are of great concern while others are trivial from clinical or diagnostic point of view.Objectives: To evaluate the diagnostic role of fine needle aspiration cytology in lymphadenopathy in pediatric agegroup. Period: Jan 2001 to Aug 2005. Material & Methods: The material was obtained by FNA from children of theregion, stained with H & E, Papaniculau, giemsa and Z.N Stain. History, physical examination and other pertinentclinicopathological parameters were noted before the FNA procedure. Th

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Tarasov, Sergei I., and Natalya V. Gerling. "Needle-Like Leaf Organs of Conifers. Part II. Modeling the Needle Surface Area." Lesnoy Zhurnal (Forestry Journal), no. 5 (October 18, 2024): 51–63. http://dx.doi.org/10.37482/0536-1036-2024-5-51-63.

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In ecological and physiological studies of plant cover, the predominant participation of leaves in the processes of photosynthesis, transpiration and respiration determines the key role of such a morphometric parameter as leaf surface area. The estimation of the area of needle-like leaf organs of conifers often requires an individual approach. The diversity of needle shapes is determined by species affiliation, morphological structure, ecological conditions and age, and, in turn, determines the diversity of methods for estimating the needle surface area. Therefore, the search for simple standa

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Uzun, Muhammet, Başak Gümüştaş, Hilal Huşçe, Md Humayun Kabir, and Emine Kanberoğlu. "A comprehensive study on the effect of different seam parameters on woven fabrics." Journal of Textile Engineering & Fashion Technology 8, no. 2 (2022): 48–52. http://dx.doi.org/10.15406/jteft.2022.08.00300.

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Nowadays, in the ready-made clothing industry, woven fabrics of different construction and pattern are used to a greater extent. Low sewing performance is a common phenomenon that is observed in these fabrics. This study aims to define the dominant parameters such as fiber, yarn, fabric structure, sewing thread, and sewing needle, which affect sewing performance and cause sewing defects, and to examine their effects on sewing quality. The most frequently used needle and sewing thread, fabric weighing under 200g/m2 which may cause a problem in sewing are selected for this study. Effective sewin

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Wu, Xiao Guang, Li Zhu, Shuang Li, et al. "Study on Magnetic Suspension-Type Needle Driving Model for a New Knitting Device." Applied Mechanics and Materials 215-216 (November 2012): 46–49. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.46.

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Based on the magnetic suspension theory, this paper has proposed a kind of suspension-type jacquard needle driving principle, and designed its 3-dimension model method. By making finite element analysis on suspension-type needles, analyzing the experimental data and designing the structure, we can get the relationship among related parameters under conditions of different permanent-magnet thickness and air gaps, which can provide criteria in theory and application for designing on new needle driving principle, control system and needle.

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Wu, Xiao Guang, Ling Xue Kong, Li Zhu, Jun Fu, and Yi Min Yang. "Study and Simulation of the Model about High-Speed Maglev Drive Needles." Advanced Materials Research 503-504 (April 2012): 1037–40. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1037.

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Based on the magnetic suspension theory, this paper has proposed a kind of suspension-type jacquard needle driving principle, and designed its 3-dimension model method. By making finite element analysis on suspension-type needles, analyzing the experimental data and designing the structure, we can get the relationship among related parameters under conditions of different permanent-magnet thickness and air gaps, which can provide criteria in theory and application for designing on new needle driving principle, control system and needle.

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Haghighat, Ezzatollah, Saeed Shaikhzadeh Najar, and Seyed Mohammad Etrati. "The Prediction of Needle Penetration Force in Woven Denim Fabrics Using Soft Computing Models." Journal of Engineered Fibers and Fabrics 9, no. 4 (2014): 155892501400900. http://dx.doi.org/10.1177/155892501400900406.

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The aim of this paper was to predict the needle penetration force in denim fabrics based on sewing parameters by using the fuzzy logic (FL) model. Moreover, the performance of fuzzy logic model is compared with that of the artificial neural network (ANN) model. The needle penetration force was measured on the Instron tensile tester. In order to plan the fuzzy logic model, the sewing needle size, number of fabric layers and fabric weight were taken into account as input parameters. The output parameter is needle penetration force. In addition, the same parameters and data are used in artificial

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BEREZIN, Leonid. "TO CALCULATE THE LOADING OF KNITTING NEEDLES OF AUTOMATIC HALF-HOSE MACHINES." HERALD OF KHMELNYTSKYI NATIONAL UNIVERSITY 299, no. 4 (2021): 131–35. http://dx.doi.org/10.31891/2307-5732-2021-299-4-131-135.

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An important link in the analysis of the longevity of details by the criterion of fatigue strength is the calculation of parameters that take into account the peculiarities of the technological regime in terms of load and the corresponding number of cycles that affect the accumulation of fatigue failure. The final range of loads of knitting needles of automatic half-hose machine was based on the systematization of amplitudes of forces depending on the frequency of their implementation. Previous works has assumed the assumption of a one interaction of the needle heel with the cams, which is exp

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Ji, Zhe, Haitao Sun, Yuliang Jiang, et al. "Analysis on the accuracy of CT-guided radioactive I-125 seed implantation with 3D printing template assistance in the treatment of thoracic malignant tumors." Journal of Radiation Research 62, no. 5 (2021): 910–17. http://dx.doi.org/10.1093/jrr/rrab068.

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Abstract This article analyzes the accuracy of needle track and dose of a 3-dimensional printing template (3DPT) in the treatment of thoracic tumor with radioactive I-125 seed implantation (RISI). A total of 28 patients were included. The technical process included: (i) preoperative CT positioning, (ii) preoperative planning design, (iii) 3DPT design and printing, (iv) 3DPT alignment, (v) puncture and seed implantation. The errors of needle position and dosimetric parameters were analyzed. A total of 318 needles were used. The mean errors in needle depth, needle insertion point, needle tip and

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Gong, He, Cai Dong She, Jian Li, and Shi Jun Li. "The Research for Electrostatic Spinning Parameters Control System at High Voltage." Applied Mechanics and Materials 263-266 (December 2012): 776–80. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.776.

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In electrospinning at high voltage, material temperature, the distance between needle and collecting plate and the situation on pushing on material within needle are factors affecting the spinning quality. The paper used the microcontroller as the core, adopted the stepping motor to regulate collecting plate position driving machinery, got feedback by the displacement sensor. During the spinning process, using the infrared temperature probe to measure the needle, meanwhile controlling miniature stepper motor to advance material within needle in constant speed driving piston. The experimental r

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Pokorny, R., I. Tomaskova, and M. V. Marek. "The effects of elevated atmospheric [CO2] on Norway spruce needle parameters." Acta Physiologiae Plantarum 33, no. 6 (2011): 2269–77. http://dx.doi.org/10.1007/s11738-011-0766-0.

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Verduyn, S. Cora, J�r�me G. M. Jungschleger, Milan Stengl, Roel L. H. M. G. Sp�tjens, Jet D. M. Beekman, and Marc A. Vos. "Electrophysiological and proarrhythmic parameters in transmural canine left-ventricular needle biopsies." Pfl�gers Archiv - European Journal of Physiology 449, no. 1 (2004): 115–22. http://dx.doi.org/10.1007/s00424-004-1306-1.

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Ishikawa, Tatsuya, Yujiro Ishii, Kengo Nakasone, Yutaka Ohkoshi, and Kim Kyoung Hou. "Structure analysis of needle-punched nonwoven fabrics by X-ray computed tomography." Textile Research Journal 89, no. 1 (2017): 20–31. http://dx.doi.org/10.1177/0040517517736470.

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Needle-punching conditions determine the structure of nonwoven fabrics and the structure determines their tensile properties. However, the structural parameters of nonwoven fabrics and the relationship between these parameters and tensile properties have not been quantitatively analyzed. Therefore, we analyzed the structure of needle-punched nonwoven fabrics by X-ray computed tomography (XCT). The relationships between the needle-punching conditions, tensile properties, and structural parameters, such as fiber-volume fraction and three-dimensional fiber orientation, were investigated. The fibe

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Li, Shu Gan, Xiao Ning Jiao, and Qing Long Jia. "Research on the Combustibility of PI Needle Punched Nonwovens by Cone Calorimeter." Advanced Materials Research 332-334 (September 2011): 1335–38. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1335.

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This paper demonstrates the combustibility of PI needle punched nonwovens by Cone Calorimeter. Ignition parameter, heat release parameters, smoke and toxicity parameters and mass loss parameters of the fabric were obtained from it. It was found that ignition time is 38 s; the peak of heat release rate is 65 kW/m2; total heat release is 7 MJ/m2; smoke release rate is 1.5 L/s; smoke factor is 1.3 MW/m2 and mass lose rate is 73.3%. Therefore the results show that PI needle punched nonwovens has excellent fire-resistance performance.

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Huang, Xiang, Xiaolong Lin, Hang Jin, et al. "Effect of Enhanced Squeezing Needle Structure on the Jetting Performance of a Piezostack-Driven Dispenser." Micromachines 10, no. 12 (2019): 850. http://dx.doi.org/10.3390/mi10120850.

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Advanced dispensing technology is urgently needed to improve the jetting performance of fluid to meet the requirements of electronic product integration and miniaturization. In this work, an on–off valve piezostack-driven dispenser was used as a study object to investigate the effect of needle structure on jetting performance. Based on fluid dynamics, we investigated nozzle cavity pressure and jet velocity during the dispensing process using theoretical simulation for needles with and without a side cap. The results showed that the needle with a side cap had larger jet velocity and was capable

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Nima, Nayema Islam, and Mohammed Abdul Hannan. "Mixed Bioconvection Flow Around a Vertical Thin Needle with Variable Surface Fluxes." Dynamics 5, no. 1 (2025): 2. https://doi.org/10.3390/dynamics5010002.

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This study investigates mixed convection flow over a vertical thin needle with variable surface heat, mass, and microbial flux, incorporating the influence of gyrotactic microorganisms. The governing partial differential equations are transformed into ordinary differential equations using appropriate similarity transformations and then solved numerically by employing MATLAB’s Bvp4c solver. The primary focus lies in examining the influence of various dimensionless parameters, including the mixed convection parameter, power-law index, buoyancy parameters, bioconvection parameters, and needle siz

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Heiner, Anneliese D., Thomas D. Brown, Victor Rossin, and Joseph A. Buckwalter. "Frictional Insertion Kinetics of Bone Biopsy Needles." Journal of Biomechanical Engineering 123, no. 6 (2001): 629–34. http://dx.doi.org/10.1115/1.1407829.

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Patients undergoing a percutaneous bone biopsy often complain of pain during needle insertion, despite local anesthesia. Bone biopsy needles are typically inserted with combined axial and twisting motions. These motions could cause pain through frictional heating or direct mechanical irritation. The hypothesis of this study is that the insertion energy of bone biopsy needles can be reduced by modifying the insertion kinetics or by adding a friction-lowering coating to the needles. Jamshidi bone biopsy needles were driven into a bone analog model by an MTS materials testing machine operating un

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Wojtasik, Dariusz. "An analysis of physical, hydraulic and mechanic properties of nonwoven needle-punched geotextiles." Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation 40, no. 1 (2008): 115–23. http://dx.doi.org/10.2478/v10060-008-0043-0.

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An analysis of physical, hydraulic and mechanic properties of nonwoven needle-punched geotextiles An analysis of physical, hydraulic and mechanic properties of needle-punched nonwoven geotextiles. This paper presents an analysis of technical parameters of needle-punched geotextiles used in engineering constructions. The tests were carried out in order to compare of physical, hydraulic and mechanic properties of needle-punched geotextiles in two different groups of products. First of group, geotextiles, were made of polypropylene fibers (PP) and the second one fabrics, were of polyester filamen

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Deng, Hui, and Zhang Li. "Study on the Needle Loom Condition Monitoring System Based on Working Condition Parameters." Advanced Materials Research 219-220 (March 2011): 709–12. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.709.

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Nowadays, the condition monitoring and intelligent fault diagnosis methods research of the needling loom in our country is still a blank. How to establish the appropriate monitoring methods under different working conditions becomes an important issue. In this article, some methods in terms of the open system construction proposed to work out the problems above, which is the Needle Loom condition monitoring system based on working condition parameters. This system take full advantage of the rapid development of hardware and software technology, providing online or offline information to remote

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Wang, Minxin, Ping Sun, Xiaodong Zhao, and Yongmei Sun. "Ultrasound Parameters of Thyroid Nodules and the Risk of Malignancy: A Retrospective Analysis." Cancer Control 27, no. 1 (2020): 107327482094597. http://dx.doi.org/10.1177/1073274820945976.

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Ultrasonography-guided fine-needle aspiration biopsy is the common choice for diagnosis of the suspected thyroid nodule. An algorithm(s) that finds the malignant potential of a nodule preoperatively, to overcome unnecessary diagnostic methods, does not exist. The objective of the study was to correlate thyroid nodule sizes measured by ultrasonography and risk of malignancy assessed by cytologic and histologic examinations. Data regarding fine-needle aspiration cytology and the results of histologic examinations of surgical specimens of 260 nodules were collected and analyzed. The macro or mult

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Ponsiglione, Alfonso Maria, Carlo Ricciardi, Enzo Bonora, Francesco Amato, and Maria Romano. "Impact of the Number of Needle Tip Bevels on the Exerted Forces and Energy in Insulin Pen Injections." Sensors 23, no. 19 (2023): 8043. http://dx.doi.org/10.3390/s23198043.

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Patients affected with type 1 diabetes and a non-negligible number of patients with type 2 diabetes are insulin dependent. Both the injection technique and the choice of the most suitable needle are fundamental for allowing them to have a good injection experience. The needles may differ in several parameters, from the length and diameter, up to the forces required to perform the injection and to some geometrical parameters of the needle tip (e.g., number of facets or bevels). The aim of the research is to investigate whether an increased number of bevels could decrease forces and energy invol

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Kühnel, Christian, Martin Freesmeyer, Falk Gühne, et al. "Technical Validation of a Training Workstation for Magnet-Based Ultrasound Guidance of Fine-Needle Punctures." Sensors 25, no. 13 (2025): 4102. https://doi.org/10.3390/s25134102.

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It has been demonstrated that needle guidance systems can enhance the precision and safety of ultrasound-guided punctures in human medicine. Systems that permit the utilization of commercially available standard needles, instead of those that necessitate the acquisition of costly, proprietary needles, are of particular interest. The objective of this phantom study is to evaluate the reliability and accuracy of magnet-based ultrasound needle guidance systems, which superimpose the position of the needle tip and a predictive trajectory line on the live ultrasound image. We conducted fine-needle

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