Relevant bibliographies by topics / Cut-off machines

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Cut-off machines'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Cut-off machines"

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Castro, Giuseppe, David Mascali, Francesco Paolo Romano, Carmen Altana, Claudia Caliri, Luigi Celona, Rossella Di Giugno, et al. "EXPERIMENTAL CHARACTERIZATION OF AN OVERDENSE PLASMA IN A COMPACT ION SOURCE." Acta Polytechnica 55, no. 3 (June 30, 2015): 146–49. http://dx.doi.org/10.14311/ap.2015.55.0146.

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<p>Electron Cyclotron Resonance Ion Sources (ECRIS) are compact plasma-based machines able to feed particle accelerators with high intensity beams of multi-charged ions. ECRIS plasmas are density-limited, since they are sustained by E.M. wave propagation up to a cut-off density value. In the past, the only way to improve ECRIS performance was to increase the microwave frequency and the magnetic field strength to satisfy the ECR condition. A different plasma heating mechanism is being applied at INFN-LNS. It is based on Electron Bernstein Waves (EBW), i.e., electrostatic waves which do not suffer any density cut-off. Highlights concerning preliminary signatures of EBW formation and subsequent absorption are given here.</p>
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Ricci, Zaccaria, Stefano Romagnoli, and Claudio Ronco. "High Cut-off Membranes in Acute Kidney Injury and Continuous Renal Replacement Therapy." International Journal of Artificial Organs 40, no. 12 (November 21, 2017): 657–64. http://dx.doi.org/10.5301/ijao.5000662.

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Innovation in continuous renal replacement therapies (CRRT) utilized to treat acute kidney injury (AKI) and sepsis, has brought new machines and techniques. Part of these new advances are due to the availability of innovative biomaterials and the construction of membranes with larger pores and wide distribution of pore sizes. This includes the creation of a new generation of high cut-off membranes whose utilization in clinical practice is promising for the wide spectrum of solutes that are removed during extracorporeal therapies. However, the enlargement of pore diameters brings some loss of albumin during treatment and this effect is still under evaluation, since there is a possibility that this is detrimental for the patient. A thorough review of the available clinical literature is reported in this paper with a reappraisal of the potential application of these new technologies.
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Huang, Pei Hsing, and Yu Ting Chen. "The Applications of Mold Flow Analysis on Vibration Separation Technologies of Investment Casting Components." Applied Mechanics and Materials 472 (January 2014): 699–703. http://dx.doi.org/10.4028/www.scientific.net/amm.472.699.

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Conventionally, the investment casting components were separated from the casting pattern tree via a grinding machine to cut off ingate/inlet of the gating system. This post-treatment process may considerably increase labor and material costs. In this paper, a fatigue damage technology was proposed to separate the components in substitution for the cutting operation of traditional grinding machines. Mold flow analyses were conducted in the design of the gating system to ensure the casting quality. An actual vibration experiment of the casting pattern tree was conducted, and the results verified that the substitutive scheme is feasible.
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Sari, Diana Puspita, and Mukhammad Faizal Ridho. "EVALUASI MANAJEMEN PERAWATAN DENGAN METODE RELIABILITY CENTERED MAINTENANCE (RCM) II PADA MESIN BLOWING I DI PLANT I PT. PISMA PUTRA TEXTILE." J@ti Undip : Jurnal Teknik Industri 11, no. 2 (June 24, 2016): 73. http://dx.doi.org/10.14710/jati.11.2.73-80.

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PT. Pisma Putra Textile adalah perusahaan yang bergerak di bidang pemintalan benang yang memiliki berbagai macam mesin produksi yang cukup sering mengalami kerusakan ketika digunakan pada proses produksi. Oleh karena itu, dibutuhkan kebijakan perawatan optimal yang dapat mengurangi frekuensi kerusakan dan menurunkan biaya perawatan mesin.. Metode yang diterapkan pada penelitian ini adalah Reliability Centered Maintenance (RCM) II. Penelitian difokuskan pada mesin Blowing I, karena memiliki downtime tertinggi. Berdasarkan frekuensi kerusakan mesin komponen yang paling sering rusak yaitu flat belt dan apron berpaku. Perawatan yang diperlukan dilakukan pada permukaan belt bergelombang, belt putus, kayu apron patah, dan paku-paku apron patah dengan scheduled discard task dengan interval perawatan dan Total Cost optimal berurutan yaitu 580 jam dengan TC Rp. 14661546,36, 465 jam dengan TC Rp 18350303,77, 490 jam dengan TC Rp 18966057,60, dan 450 jam dengan TC Rp 13419317,27. Sedangkan perawatan untuk kerusakan karet kendor adalah scheduled restoration task dengan interval perawatan 340 jam dan TC Rp 16338431,41. Total penurunan biaya keseluruhan sebesar Rp 21.587.975,45 atau 20,89% dari biaya perawataan perusahaan. Abstract PT. Pisma Putra Textile is a yarn spinning company which have various production machines which often breakdown on production process. So, the company should have optimum maintenance policy which could reduce breakdown frequency and maintenance cost. The methods which applied in this research is Reliability Centered Maintenance (RCM). Based on data which was given, it shows that Blowing I Machine have the highest downtime so the research focuses on Blowing I Machine. Based on data which was given, it shows that Blowing I Machine have the highest downtime so the research focuses on Blowing I Machine. Based on machine’s breakdown frequency and total downtime, the results shows that the critical components on Blowing I Machine are flat belt and Apron berpaku component. Based on maintenance interval analysis and optimum total cost shows that maintenance for bumpy flat belt surface, flat belt cut-off, spike lattice wood cut-off, spike lattice cut-off with scheduled discard task is 580 hours and Rp 14.661.546,36 ; 465 hours and Rp. 18.350.303,77 ; 490 hours and Rp. 18.966.057,6 ; 450 hours and Rp. 13.419.317,27 respectively. Then, maintenance interval analysis and optimum total cost for flat belt looses with scheduled restoration task is 340 hours and Rp. 16.338.431,41. So, there's a reduction cost Rp. 21.587.975,45 or 20,89% lower than the company's maintenance cost.
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Kuleshkov, Yuri V., Timofey V. Rudenko, Mikhailo V. Krasota, Miroslav Bošanský, and František Tóth. "Performance Features of Tooth Gearing in Gear Hydraulic Machines." Acta Technologica Agriculturae 24, no. 2 (May 21, 2021): 84–91. http://dx.doi.org/10.2478/ata-2021-0014.

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Abstract The paper presented determines that the rotation velocities of gears and radii connecting the axes of rotation of the gears with the point of their teeth gearing are not equal with each other. It is explained by the relative slip of involute gear profiles during their rolling. This phenomenon will become a prerequisite for further development of creation of mathematical models in the context of theory of gear hydraulic machines. The models can explain a number of specific phenomena in the operation of gear hydraulic machines, such as pressure and input pulsations, dynamics of hydraulic oil in the cut-off plane, combined torque pulsations in gear hydraulic motors and others.
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Morales, Maria-Aurora, Renato Prediletto, Giuseppe Rossi, Giosuè Catapano, Massimo Lombardi, and Daniele Rovai. "Routine Chest X-ray: Still Valuable for the Assessment of Left Ventricular Size and Function in the Era of Super Machines?" Journal of Clinical Imaging Science 2 (May 23, 2012): 25. http://dx.doi.org/10.4103/2156-7514.96540.

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Objectives: The development of technologically advanced, expensive techniques has progressively reduced the value of chest X-ray in clinical practice for the assessment of left ventricular (LV) dilatation and dysfunction. Although controversial data are reported on the role of this widely available technique in cardiac assessment, it is known that the cardio-thoracic ratio is predictive of risk of progression in the NYHA Class, hospitalization, and outcome in patients with LV dysfunction. This study aimed to evaluate the reliability of the transverse diameter of heart shadow [TDH] by chest X-ray for detecting LV dilatation and dysfunction as compared to Magnetic Resonance Imaging (MRI) performed for different clinical reasons. Materials and Methods: In 101 patients, TDH was measured in digital chest X-ray and LV volumes and ejection fraction (EF) by MRI, both exams performed within 2 days. Results: A direct correlation between TDH and end-diastolic volumes (r = .75, P<0.0001) was reported. TDH cut-off values of 14.5 mm in females identified LV end-diastolic volumes >150 mL (sensitivity: 82%, specificity: 69%); in males a cut-off value of 15.5 mm identified LV end-diastolic volumes >210 mL (sensitivity: 84%; specificity: 72%). A negative relation was found between TDH and LVEF (r = -.54, P<0.0001). The above cut-off values of TDH discriminated patients with LV systolic dysfunction – LVEF <35% (sensitivity and specificity: 67% and 57% in females; 76% and 59% in males, respectively). Conclusions: Chest X-ray may still be considered a reliable technique in predicting LV dilatation by the accurate measurement of TDH as compared to cardiac MRI. Technologically advanced, expensive, and less available imaging techniques should be performed on the basis of sound clinical requests.
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Schellinck, Tony, Tracy Schrans, Heather Schellinck, and Michael Bliemel. "Instrument Development for the FocaL Adult Gambling Screen (FLAGS-EGM): A Measurement of Risk and Problem Gambling Associated with Electronic Gambling Machines." Journal of Gambling Issues, no. 30 (May 1, 2015): 174. http://dx.doi.org/10.4309/jgi.2015.30.8.

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Previous research, based on a survey of 374 electronic machine gamblers living in Ontario, Canada, led to the selection of statements and the creation of ten constructs for the development of a new instrument, the FocaL Adult Gambling Screen for Electronic Gambling Machines (FLAGS-EGM). In this study, we used the Partial Least Squares Path Analysis form of Structural Equation Modelling to produce a hierarchical set of the ten constructs with proven predictive power for problem gambling. Receiver Operating Characteristic analysis identified cut off values for all of the constructs that predicted the target values with the desired degree of accuracy. Active gamblers were placed in five categories: No Detectable Risk, Early Risk, Intermediate Risk, Advanced Risk and Problem Gamblers. As described here, the FLAGS-EGM instrument has the potential to be applied in many situations in which identification of at-risk EGM gamblers is needed.
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Starovoitov, Nikolai Andreyevich. "EXPERIMENTAL STUDIES OF THE EFFICIENCY OF MAINTAINING CONSTANT CUTTING SPEED ON ABRASIVE CUT-OFF MACHINES WITH A ROTATING SPINDLE ASSEMBLY." Вестник Белорусско-Российского университета, no. 3 (2019): 84–92. http://dx.doi.org/10.53078/20778481_2019_3_84.

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González-Ibáñez, A., M. N. Aymamí, S. Jiménez, J. M. Domenech, R. Granero, and M. R. Lourido-Ferreira. "Assessment of Pathological Gamblers Who Use Slot Machines." Psychological Reports 93, no. 3 (December 2003): 707–16. http://dx.doi.org/10.2466/pr0.2003.93.3.707.

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The aim of the present study was to classify pathological gamblers based on their psychopathology as related to the variable sensation-seeking, and to check possible differences between the groups on the sociodemographic variables. The sample was composed of 110 male pathological gamblers using slot machines who requested treatment at the Pathological Gambling Unit at the Ciutat Sanitària i Universitària de Bellvitge. It was observed that pathological gamblers comprise three clusters, differentiated with differing severity depression, psychoticism, somatization, impulsiveness, interpersonal sensitivity, and phobic anxiety. Cluster 1, representing 46.7% of the sample, showed mean scores higher than or equal to T = 63. On the subscales of Depression, Psychoticism, Interpersonal Sensidvity, Phobic Anxiety, and Obsessiveness–Compulsiveness the score was close to T = 63 (the clinical cut-off score). Cluster 2, representing 23.8% of the sample, scored higher than Cluster 1 on the following subscales: Depression, Phobic Anxiety, Interpersonal Sensitivity, Psychoticism, Obsessive–Compulsive, and Somatization. On Cluster 3 highest mean scores were observed on all SCL-90-R dimensions relative to the other two groups. What distinguished these subgroups is not symptomatology but the severity of the psychopathology. On the other hand, sensation seeking was similar for the three clusters, and the slight differences depended on the subjects' psychopathology.
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Giuffrè, Mauro, Michela Giuricin, Deborah Bonazza, Natalia Rosso, Pablo José Giraudi, Flora Masutti, Stefano Palmucci, et al. "Optimization of Point-Shear Wave Elastography by Skin-to-Liver Distance to Assess Liver Fibrosis in Patients Undergoing Bariatric Surgery." Diagnostics 10, no. 10 (October 7, 2020): 795. http://dx.doi.org/10.3390/diagnostics10100795.

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Background: Obesity is a primary limiting factor in liver stiffness measurement (LSM). The impact of obesity has always been evaluated in terms of body mass index (BMI), without studying the effects of skin-to-liver distance (SLD) on LSM. We studied the impact of SLD on LSM in a cohort of obese patients undergoing bariatric surgery and intra-operatory liver biopsy. Materials and Methods: 299 patients underwent LSM by point-shear wave elastography (ElastPQ protocol), with two different ultrasound machines. SLD was measured as the distance between the skin and the liver capsule, perpendicular to where the region of interest (ROI) was positioned. We used the following arbitrary cut-offs: <5.7 kPa, F0–1; 5.7–7.99 kPa, F2; ≥8 kPa, F3–4. Results: We developed two logistic regression models using elastography–histology agreement (EHA) as the dependent variable and SLD as the independent variable. The model based on the second machine showed strongly more performant discriminative and calibration metrics (AIC 38.5, BIC 44.2, Nagelkerke Pseudo-R2 0.894, AUROC 0.90). The SLD cut-off value of 34.5 mm allowed a correct EHA with a sensitivity of 100%, a specificity of 93%, negative predictive value of 100%, positive predictive value of 87%, an accuracy of 96%, and positive likelihood ratio of 3.56. Conclusion: The impact of SLD is machine-dependent and should be taken into consideration when interpreting LSM. We believe that our findings may serve as a reference point for appropriate fibrosis stratification by liver elastography in obese patients.
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Dissertations / Theses on the topic "Cut-off machines"

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Koláček, David. "Zefektivnění technologie rozbrušování konstrukčními úpravami." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232196.

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This thesis is oriented to technological and design direction. It is focused on the upgrading of existing machinery from a structural perspective. There is studied the impact of design modifications to the existing production process from a technological point of view. This thesis is specifically concentrated on the technology division of the material, especially on the technology cutting-off in dry condition. There is examined the ability of self-sharpening cutting tools and the quality of the final product under varying input conditions. The job is finished by the carried out techno-economic evaluation, where are compared the costs of the structural adjustments in comparison with mechanical equipment, that could be purchased on the market. The thesis is finished with overall analysis of the optimal efficiency of the production process.
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Jan, Hung-Nan, and 詹弘楠. "The Development of Rotation-type Cut-off and Cutting Machine Control." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/79722590550318302012.

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碩士
修平技術學院
精密機械與製造科技研究所
99
『Rotation-type Cutting Machine』was designed to cut the drill bit and endmill when they were in sharpening. The structure of the 『Rotation-type Cutting Machine』 has two motors power source, which one power source drive rotation cutter, and the other one power source drive the fixture clamp. Base on the function requirement, a small size controller is required for auto feed and position control. In this study, JCXF5 Linear Encoder sensor and Atmega8515 microcontrollers was used to develop a displacement variation measurement and monitor device. The JCXF5 Linear Encoder sensor converts the measure distance into a series square wave signal. The code of Atmega8515 microcontrollers was programmed to count the number of the square wave signal and convert to digital signal for Liquid Crystal Display. By the way, the digital signal can also drive the DC motor in clockwise and counterclockwise direction. The laser interferometer was used to verify displacement variation measurement device. A set of different distances, from 10mm to 38.69mm, was measured by the displacement variation measurement device and laser interferometer. The mean errors were 0.07 to 0.2mm by five times test for each different distance.
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Books on the topic "Cut-off machines"

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3DO Games Secrets: Book Two. Maui, HI: Sandwich Islands Publishing, 1996.

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The 2006-2011 World Outlook for Metal Sawing and Cut-Off Machines for Home Workshops, Laboratories, and Garages. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Metal Sawing and Cut-Off Machines for Home Workshops, Laboratories, and Garages. ICON Group International, Inc., 2006.

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Book chapters on the topic "Cut-off machines"

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Garrett, Steven L. "One-Dimensional Propagation." In Understanding Acoustics, 453–512. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_10.

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Abstract Having already invested in understanding both the equation of state and the hydrodynamic equations, only straightforward algebraic manipulations will be required to derive the wave equation, justify its solutions, calculate the speed of sound in fluids, and derive the expressions for acoustic intensity and the acoustic kinetic and potential energy densities of sound waves. The “machinery” developed to describe waves on strings will be sufficient to describe one-dimensional sound propagation in fluids, even though the waves on the string were transverse and the one-dimensional waves in fluids are longitudinal. These results are combined with the thermal and viscous penetration depths to calculate the frequencies and quality factors in standing wave resonators. The coupling of those resonators to loudspeakers will be examined. The introduction of reciprocal transducers that are linear, passive, and reversible will allow absolute calibration of transducers using only electrical measurements (i.e., currents and voltages) by the reciprocity method, if the acoustic impedance that couples the source and receiver is calculable. Reflection and transmission at junctions between multiple ducts and other networks will be calculated and applied to the design of filters. The behavior of waves propagating through horns will provide useful impedance matching but introduce a low-frequency cut-off.
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Lambert, Nicholas A. "The Beggar Giant." In The War Lords and the Gallipoli Disaster, 86–104. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197545201.003.0005.

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During late 1914, British strategic policy was to buttress France and wait for the Russian army to win the war against Germany. None of the allies was willing to make financial sacrifices for the greater strategic good if doing so risked endangering their postwar position. The weak economic and financial supports undergirding the Russian war machine, however, imperiled Britain’s hopes that its eastern ally could defeat Germany. Turkish entry into the war exacerbated Russia’s financial problems by preventing the export of Russian wheat through the Dardanelles. Not only did this cut the global supply of wheat by a third and cause grain prices to spiral, it also cut Russia off from its main source of foreign exchange and caused its international creditworthiness to collapse. At the end of 1914, Russia demanded massive loans from Britain to stay in the war, which Britain was reluctant to give.
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Pramanik, Debal, and Dipankar Bose. "Experimental Evaluation on Corner Accuracy in WEDM for Aluminium 6061 Alloy." In Machine Learning Applications in Non-Conventional Machining Processes, 96–113. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3624-7.ch007.

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An important electro-thermal process known as wire electrical discharge machining (WEDM) is applied for machining of conductive materials to generate most precisely. All cutting inaccuracies of WEDM arise out of the major cause of wire bending. At the time of cutting a sharp corner or cut profile, bending of the wire leads to a geometrical error on the workpiece. Though this type of error may be of a few hundred microns, it is not suitable for micro applications. In this research study, an experimental investigation based on response surface methodology (RSM) has been done on wire EDM of Aluminium 6061 t6 alloy. This chapter studies the outcome of input process variables (i.e., wire feed rate, pulse on time, pulse off time, and gap voltage) on machining output responses (i.e., corner inaccuracy) extensively. Experimental validation of the proposed model shows that corner inaccuracy value may be reduced by modification of input parameters.
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Léger, Alain, Johannes Heinecke, Lyndon J. B. Nixon, Pavel Shvaiko, Jean Charlet, Paola Hobson, and François Goasdoué. "Semantic Web Take-Off in a European Industry Perspective." In Semantic Web for Business, 1–29. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-066-0.ch001.

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Semantic Web technology is being increasingly applied in a large spectrum of applications in which domain knowledge is conceptualized and formalized (e.g., by means of an ontology) in order to support diversified and automated knowledge processing (e.g., reasoning) performed by a machine. Moreover, through an optimal combination of (cognitive) human reasoning and (automated) machine processing (mimicking reasoning); it becomes possible for humans and machines to share more and more complementary tasks. The spectrum of applications is extremely large and to name a few: corporate portals and knowledge management, e-commerce, e-work, e-business, healthcare, e-government, natural language understanding and automated translation, information search, data and services integration, social networks and collaborative filtering, knowledge mining, business intelligence and so on. From a social and economic perspective, this emerging technology should contribute to growth in economic wealth, but it must also show clear cut value for everyday activities through technological transparency and efficiency. The penetration of Semantic Web technology in industry and in services is progressing slowly but accelerating as new success stories are reported. In this chapter we present ongoing work in the cross-fertilization between industry and academia. In particular, we present a collection of application fields and use cases from enterprises which are interested in the promises of Semantic Web technology.
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Toal, Gerard. "Territorial Integrity." In Near Abroad. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190253301.003.0010.

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On the Evening of August 7, 2008, Inal Pliyev was working late at his office in the center of Tskhinval(i). A former journalist, Pliyev was head of communications for the self-declared South Ossetian Republic. Earlier in the evening, Georgian president Mikheil Saakashvili had declared a unilateral ceasefire after days of skirmishes between Georgian forces and South Ossetian militias. Pliyev, however, was still in the office because of information about increasing Georgian artillery and armor concentrations near the town. “First we heard what sounded like grenade launchers—after the years of conflict everyone here knows what sound is made by which weapon. I did not pay much attention to that.” But when he heard the first sounds of Grad missiles, Pliyev turned off his computer and ran for his life. “All parts of the city came under fire simultaneously. It was so intense, that you couldn’t even register a fraction of time between explosions, there were multiple explosions every second. The fire was non-stop. Electricity and gas supplies were cut off during the first minute of the shelling, and for the most part phone service was also cut off.” One shell fell next to the government building where Pliyev and his colleagues huddled. “The building shook so much that part of the ceiling bent down, and we ran into an underground bunker in a nearby non-government building. Explosions were becoming louder and even more frequent. We could not leave our hideout, and everyone was getting ready to die. Even more we feared being taken prisoner by Georgian soldiers. It was especially terrifying when we heard machine gun fire. Our only thought was to avoid being taken prisoner at any cost. Our only hope was for the Russian air force, we were waiting for it to come, so that Georgians would leave our city. But it wasn’t coming.” Pliyev had his mobile phone, and as its battery ran out he spoke to various Russian media outlets pleading for Russian military help.
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"deteriorating situation of the mountain peasantry became a defense problem, did this question of 'rural exchange' receive high priority in the Economic Programme of the government [SPP, 1985]. Agrarian investment in the 1980-84 period was maintained at a high level, equivalent to about half the national total. This was almost exclusively concentrated on the APP: that is, in about half the modern sector or about a quarter of the whole of agriculture. This investment included extensive irrigation works, imports of tractors and combine harvesters, coffee reno-vation, a sugar mill, palm oil plantations, intensive dairy and beef breeding units, as well as the recapitalisation of the new state farms ruined by their previous owners. It formed part of a long-term strategy discussed below and thus did not itself add much to production during the first five years, although it did help compensate declines in the large private production sector. Given the external terms of trade (which had deteriorated by 40 per cent between 1977 and 1983 [CEPAL, 1984]) and the gradual recovery of production, the agricultural sector was not in a position to generate a sufficiently large surplus to finance its own investment. Even though the sector generated three times more exports than it absorbed imports [MIDINRA, 1985], the foreign exchange thus released was needed to maintain basic consumption elsewhere in the economy. Similarly, food supplies over and above the requirements of the agrarian workforce were needed to maintain the rest of the population; there was no significant capital goods sector to absorb these wagegoods [FitzGerald, 1982]. Thus, this investment was basically financed from abroad, initially with long-term development loans from multilateral institutions, but as US agression increased these funds were cut off and replaced by commercial credits from both capitalist and socialist suppliers. This was economically justifiable in that the increment in exports (or substituted imports) would have a compensatory balance of payments effect within a few years. Eventually, however, a net exchange surplus would have to be generated so that agroexports should expand more rapidly than domestic foodstuffs rather than the reverse, as had been the case between 1980 and 1984, when popular living standards had a higher priority than the trade balance. None the less, the major shortcoming of this accumulation model was undoubtedly its almost exclusive concentration on the APP as the focus of modernisation. Large private farmers might not wish to invest, but the middle farmers and the co-operatives were also neglected in machinery assignment, cattle restocking, and irrigation equipment. The political objective of preventing the re-emergence of capitalist accumulation or the reconstruc-tion of a rural bourgeoisie (albeit on a petty scale) appears to have been the main justification. However, the cost in terms of production was high, and in any case such a sector could have been simply controlled through the existing fiscal, banking and commercial mechanisms, let alone the eventual application of the Agrarian Reform laws." In The Agrarian Question in Socialist Transitions, 226–29. Routledge, 2013. http://dx.doi.org/10.4324/9780203043493-39.

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Conference papers on the topic "Cut-off machines"

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Asamer, Norbert. "HIGH PERFORMANCE ABRASIVE CUT-OFF MACHINES TO IMPROVE OPERATION OF HOT ROLLING MILLS." In 51º Seminário de Laminação - Processos e Produtos Laminados e Revestidos - Internacional. São Paulo: Editora Blucher, 2014. http://dx.doi.org/10.5151/1983-4764-25269.

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Doorsamy, W., M. Muteba, B. Twala, and D. V. Nicolae. "Investigation into effects of a novel rotor cut-off design for synchronous reluctance machines." In 2017 IEEE 26th International Symposium on Industrial Electronics (ISIE). IEEE, 2017. http://dx.doi.org/10.1109/isie.2017.8001266.

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"Analysis of Groundwater Seepage State of Foundation Pit with Pensile Cut-off Curtain." In 2017 4th International Materials, Machinery and Civil Engineering Conference. Francis Academic Press, 2017. http://dx.doi.org/10.25236/matmce.2017.04.

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Kang, Kyung Jun, Jun Geon Park, You Hwan Shin, Kwang Ho Kim, M. A. Wahid, S. Samion, N. A. C. Sidik, and J. M. Sheriff. "Flow Characteristics with Variations of Cut-Off Angle of Multi-Blade Fan for Ventilation." In THE 10TH ASIAN INTERNATIONAL CONFERENCE ON FLUID MACHINERY. AIP, 2010. http://dx.doi.org/10.1063/1.3464922.

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Van der Vegte, Wilhelm F., and Imre Horva´th. "Including Human Behavior in Product Simulations for the Investigation of Use Processes in Conceptual Design: A Survey." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99541.

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In this paper, approaches for behavioral simulation of humans and human-artifact systems are reviewed The objective was to explore available knowledge for the development of a new method and system for the simulation of use processes of consumer durables in conceptual design. A key issue is to resolve the trade-off between minimizing the modeling and computing effort on the one hand, and maximizing the amount of valuable information obtained from simulations to facilitate improving the product. After drawing up review criteria, we reviewed existing simulation approaches, which we characterized based on the simulation models. We found that the surveyed approaches can only address limited, largely unconnected subsets of the various behaviors that can be simulated. For the most advanced approaches, the subsets can be clustered into three main groups: (i) kinematics and rigid-body kinetics simulated with non-discretized object models, (ii) mechanical-deformation behavior and non-mechanical physical behavior simulated with discretized object models and (iii) interpreted physical behavior (information processing) simulated with finite-state machines. No clear-cut solutions for integrated behavioral simulation of use processes have been found, however, we could identify opportunities to bridge the gaps between the three groups of behavior, which can help us to resolve the aforementioned trade-off. In the first place, it seems that the possibilities for using discretized models in kinematics simulation (especially with consideration of the large deformations that are common in biomechanics) have not been fully explored. Alternatively, a completely new uniform modeling paradigm, possibly based on particles, might also help to resolve the gap between the two distinct groups of physical behaviors. Finally, hybrid simulation techniques can bridge the gap between the observed physical behaviors and interpreted physical behaviors. Here, the combination with the object models commonly used for simulations in group (i) and (ii) seems to be largely unexplored. Our findings offered valuable insights as a starting point for developing an integrated method and system for modeling and simulating use processes. We expect that other researchers dealing with similar issues in combining seemingly disconnected simulation approaches could benefit as well.
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Gupta, S. K., B. Chatterjee, and Rajesh Kumar. "Mechanical and Hydraulic Loads on the Supports of the Rotary Machine Due to Shaft Seizure in a Nuclear Power Plant." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2738.

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In a nuclear power plant there are two major equipment with high mechanical inertia, which have a rotating shaft. These are Pumps in the Primary Heat Transport System and Turbine in the secondary system. In both cases, the shaft seizure leads to transfer of very large loads to the supports. These supports, if not designed for seizure loads may fail. If the supports fail, there is a good possibility of a missile generated and hit the safety equipment. Seizure loads in these machines have three components namely mechanical inertial load, electrical load and hydraulic load. While the electrical and hydraulic loads have a limited peak value, the inertial load depends on the seizure time. For the normal observed seizures the three have a similar order of magnitude during seizure. As the casing is overdesigned the combined load is experienced by the supports. The pump of the Primary Heat Transport System (PHTS) of a nuclear power plant is centrifugal type run by an induction motor. If the pump shaft seizes, the seizure load will be experienced by the support structure. Due to the presence of the flywheel, the total moment of inertia of the pump motor assembly is quite high. Hence the resisting torque may be higher than the support’s design torque. Besides, the electric torque will continue to be applied as the motor trip on the overload current is delayed by several seconds as the corresponding relay is a thermal relay. Seizure torque will depend on pump seizure time. Lesser the seizure time, higher would be the load on the pump supports. The turbine in the secondary system has a large inertia due to blades. In case of a seizure the generator is tripped in hundreds of milliseconds. The load experienced by turbine supports due to seizure is significantly enhanced in the first few seconds due to sustained steam supply before it is cut off. This paper discusses the estimation of the three types of loads during seizure of the shafts in the pumps and turbine. It also discusses the possible safety consequences of these loads.
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Richards, N. D., B. K. Fussell, and R. B. Jerard. "Efficient NC Machining Using Off-Line Optimized Feedrates and On-Line Adaptive Control." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33618.

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A combination of off-line feedrate optimization and online adaptive force control is used to maintain a reference peak force during end milling for safe, accurate, and efficient machining. Feedrate optimization algorithms use geometry and force models to calculate feedrates for each tool move, based on a reference peak force. The adaptive controller adjusts the feedrate during machining to maintain the reference peak force. It is the combination of these methods that yields accurate force control, unobtainable with either method by itself. Adaptive control alone is inadequate to handle significant transient cut conditions because of the slow system response time. Optimization algorithms are subject to modeling errors that can lead to significant force errors when cutting. Design parameters for the adaptive controllers are selected using an experimentally validated machining process model. The adaptive controllers are implemented on an open architecture controlled (OAC) 3-axis NC milling machine, and evaluated using three experimental test cases: a sine cut, a prismatic cut, and a corner cut. Feedrates for each cut are first optimized off-line, then used in actual machining with and without controller action. Experimental results demonstrate the ability of the integrated system to effectively regulate peak forces for cutting conditions commonly encountered in end milling operations. In particular, a variable geometry sine cut that initiates chatter shows the advantages of the combined system.
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Ghannam, Hanan, Houssam Mourani, and Brian Joseph Schwanitz. "Well Cutting Without Explosives with Multiple Cuts on a Single Run." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206158-ms.

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Abstract Pipe cutting operations are often a critical part of stuck pipe situations, well interventions and plug and abandon operations which all need to remove cut sections of pipe from the well. Unlike traditional ‘blade’ style e-line cutters, which can jam under pipe compression or explosive pipe cutters, which need to dress-over the jagged cut by the rig, a new electric line mechanical cutter's unique design enables performance even if the pipe is under compression, in tension or is neutral. It can also perform multiple cuts in the same run, while creating a clean and machined cut with tool-entry friendly shape. This paper will describe the technology of the new generation cutter, present two case histories; one of multiple cuts of stuck drill pipe, per each run in hole, from Germany and one of a critical tubing cut from a subsea well in Nigeria, using electric wireline and tractor conveyed services for many tasks traditionally performed with coiled tubing in highly deviated wells. These "light vs heavy" solutions can often be done off-line from the rig.
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Saptaji, Kushendarsyah, and Sathyan Subbiah. "Orthogonal Cutting Study of the Micro-Cutting Thin Workpiece." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50256.

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With a broader intention of producing thin sheet embossing molds, results from investigations in orthogonal cutting of thin workpieces are presented here. Challenges in machining thin workpieces are many: residual stress effects, fixturing challenges, and substrate effects. Aluminum alloy Al6061-T6 workpiece fixture using an adhesive is orthogonally cut with a single crystal diamond tool. We study trends in cutting forces, understand to what level of thickness we can machine the workpiece down to and in what the form the adhesive fails. Two types of workpiese-adhesive anomalies were noticed. One is the detachment of the thin workpiece by peel-off and the other one is where the workpiece did not get detached but the final width of the workpiece was non-uniform. We then use a validated finite element machining model to understand the stresses in the workpiece when it is thick and when machined to thin condition, effect of the adhesive itself and also the effect of adhesive thickness. Simulations show that the stress induced by the cutting process at the bottom of the workpiece is higher for the thinner workpiece (40 μm) compare to a thicker workpiece (400 μm) especially at the tool entrance region for adhesive thicknesses of 30 μm and 100 μm. Hence a thinner workpiece is more susceptible to failure by adhesive peeling.
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Yeole, Shivraj, Nagabhushana Ramesh Nunna, and Balu Naik Banoth. "Investigating the Effect of Machining Parameters on Microdrilling of Titanium Grade 19 Alloy." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65921.

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Electrical Discharge Micro Drilling (EDMD) is considered as one of the most effective method for machining difficult to cut and hard materials like titanium alloy. However, selection of process parameters for achieving superior surface finish, higher machining rate and accuracy is a challenging task in drilling micro-holes. In this paper, an attempt is made to optimize micro-EDM process parameters for drilling micro holes on titanium grade 19 alloy. In order to verify the optimal micro-EDM process parameters settings, material removal rate (MRR), electrode wear rate (EWR) and over cut (OC) were chosen as the responses to be observed. Pulse on time, pulse off time, electrode diameter and current were selected as the governing process parameters for evaluation by Taguchi method. Nine micro holes of 300 μm, 400 μm and 500 μm were drilled using L9 orthogonal array (OA) design. Optimal combination of machining parameters were obtained through Signal-to-Noise (S/N) ratio analysis. It is seen that machining performances like material removal rate and overcut are affected by the peak current whereas electrode wear is affected by peak current and electrode diameter. Morphology of the micro holes has been studied through SEM micrographs of machined micro-hole.
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