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Journal articles on the topic 'Position Base'
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1
Ariantono, Alexander, and Djoko Untoro Suwarno. "Auto-level System on 3D Printer Bed Using Arduino and 3D Touch Probe Sensor." International Conference on Information Science and Technology Innovation (ICoSTEC) 1, no. 1 (2022): 19–24. http://dx.doi.org/10.35842/icostec.v1i1.3.
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The development of technology today has emerged the latest technology in three-dimensional (3D) printer machines. Problems faced by 3D printers include the position of the printer bed that is not horizontal. The position of the printer bed that is not horizontal will cause the 3D print to be skewed. To overcome the problem of tilting the bed of a 3D printer, the auto-level system is needed, which is a system that can correct the position of the base so that it becomes horizontal. In this study, an auto-leveling system was designed and made for four 3D printing base support positions. The drive for the printing press uses a stepper motor with a worm gear transmission. The controller uses an Arduino board and tested various position sensors to determine the slope of the base. The sensor tested is a 3D touch probe sensor. From the test results, the 3D touch probe sensor has a height value difference of not more than 0.05mm from each measurement position. The print base slope reference point is at the center point of the print base. The position of the other corner of the base will be adjusted in height with a stepper motor drive.
2
Jansen, C., A. M. Gronenborn, and G. M. Clore. "The binding of the cyclic AMP receptor protein to synthetic DNA sites containing permutations in the consensus sequence TGTGA." Biochemical Journal 246, no. 1 (1987): 227–32. http://dx.doi.org/10.1042/bj2460227.
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The binding of the cyclic AMP receptor protein (CRP) to symmetrical synthetic DNA-binding sites was investigated with a gel-retardation assay. A set of ten different sequences was employed, comprising all base permutations at positions 2, 4, and 5 of the consensus sequence 5′(TGTGA)3′. We show that: (i) CRP has a higher affinity for the completely symmetrical site than towards the lac wild-type site; (ii) base substitutions at position 2 lead to either a complete loss of specific CRP binding (G—C), a reduction in specific CRP binding (G—A) or only marginal effects on specific CRP binding (G—T); (iii) changes at position 4 abolish (G—C; G—A) or reduce (G—T) specific CRP binding; and (iv) base permutations at position 5 reduce specific CRP binding, but never completely abolish it. Thus position 4, and to a lesser extent position 2, in the DNA consensus sequence are the most crucial ones for specific binding by CRP.
3
Roberts, Taylor. "Deriving Second Position." Canadian Journal of Linguistics/Revue canadienne de linguistique 46, no. 1-2 (2001): 127–53. http://dx.doi.org/10.1017/s0008413100017965.
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AbstractAn examination of Pashto’s second-position pronominal clitics reveals that they are best regarded as agreement morphemes rather than as arguments of the verb. By base-generating these clitics as heads of agreement projections, their appearance in second position may be derived without recourse to phonological reordering rules, which have been necessary in earlier analyses.
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Majima, Ryuichi. "Life positions of fossil naticid opercula (Mollusca: Gastropoda)." Journal of Paleontology 61, no. 1 (1987): 62–65. http://dx.doi.org/10.1017/s0022336000028201.
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Two life positions of fossil naticid opercula are recognized in Pliocene deposits of Hokkaido, northern Japan. In one position, the operculum seals the aperture. In the other position, the operculum is pressed against the shell base adjacent to the aperture. The death position of the head-foot mass can be reconstructed from the two opercular positions, which coincide, respectively, to naticids that died with the head-foot mass retracted into the shell, and those that died with it entirely extended from the shell.
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Kuninobu, Yoichiro. "Development of Novel C–H Bond Transformations and Their Application to the Synthesis of Organic Functional Molecules." Synlett 29, no. 16 (2018): 2093–107. http://dx.doi.org/10.1055/s-0037-1610531.
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This personal account summarizes our recent progress in the development of C–H transformations. We achieved ortho-selective C–H borylations and silylations by using Lewis acid–base interaction between two substrates and we achieved meta- and ortho-selective C–H borylations by using hydrogen bonding or Lewis acid–base interaction between a hydrogen donor or Lewis acid unit of a ligand and a functional group of a substrate. Regioselective C–H trifluoromethylations and related reactions of six-membered heteroaromatic compounds were realized at their 2- and 4-positions and at their benzylic positions. In addition, we developed C–H transformations directed towards the synthesis of organic functional materials, such as highly soluble polyimides or π-conjugated molecules containing either heteroatom(s) or a Lewis acid–base interaction.1 Introduction2 Regioselective C–H Transformations Controlled by Noncovalent Bond Interactions2.1 Regioselective C–H Transformations Controlled by Lewis Acid–Base Interaction between Two Substrates2.2 Regioselective C–H Transformation Controlled by Hydrogen Bonding between Ligand and Substrate2.3 Regioselective C–H Transformations Controlled by Lewis Acid–Base Interactions between Ligands and Substrates3 Trifluoromethylation and Related Transformations of Six-Membered Heteroaromatic Compounds3.1 2-Position-Selective C–H Trifluoromethylation of Six-Membered Heteroaromatic Compounds3.2 4-Position-Selective C–H Trifluoromethylation of Six-Membered Heteroaromatic Compounds3.3 Benzyl Position-Selective C–H Trifluoromethylation of Six-Membered Heteroaromatic Compounds4 C–H Transformations Leading to the Synthesis of Organic Functional Materials4.1 Heteroatom-Containing π-Conjugated Molecules4.2 π-Conjugated Molecules Containing a Lewis Acid–Base Interaction4.3 Soluble Polyimide Derivatives5 Conclusions
6
Pallaseni, Ananth, Elin Madli Peets, Jonas Koeppel, et al. "Predicting base editing outcomes using position-specific sequence determinants." Nucleic Acids Research 50, no. 6 (2022): 3551–64. http://dx.doi.org/10.1093/nar/gkac161.
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Abstract CRISPR/Cas base editors promise nucleotide-level control over DNA sequences, but the determinants of their activity remain incompletely understood. We measured base editing frequencies in two human cell lines for two cytosine and two adenine base editors at ∼14 000 target sequences and find that base editing activity is sequence-biased, with largest effects from nucleotides flanking the target base. Whether a base is edited depends strongly on the combination of its position in the target and the preceding base, acting to widen or narrow the effective editing window. The impact of features on editing rate depends on the position, with sequence bias efficacy mainly influencing bases away from the center of the window. We use these observations to train a machine learning model to predict editing activity per position, with accuracy ranging from 0.49 to 0.72 between editors, and with better generalization across datasets than existing tools. We demonstrate the usefulness of our model by predicting the efficacy of disease mutation correcting guides, and find that most of them suffer from more unwanted editing than pure outcomes. This work unravels the position-specificity of base editing biases and allows more efficient planning of editing campaigns in experimental and therapeutic contexts.
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Niikuni, Naoko, Ichiro Nakajima, and Morito Akasaka. "The relationship between tongue-base position and craniofacial morphology in preschool children." Journal of Clinical Pediatric Dentistry 28, no. 2 (2005): 131–34. http://dx.doi.org/10.17796/jcpd.28.2.7w76065u63086366.
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The association between tongue-base position and craniofacial morphology was investigated in 35 preschool children (17 girls and 18 boys), 3 to 6 years of age, by the lateral cephalometric radiographs. There was no statistical difference in the measurements of those between girls and boys. Posterior facial height, nasal floor length, mandibular corpus length and tongue-base position were positively correlated with age, and tongue-base position was correlated with maxillary position, vertical mandibular rotation and the nasopharyngeal airway space. The results of this study showed that tongue-base position influenced maxillo-mandibular growth even in young preschool children.
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von Pawel-Rammingen, U., S. Aström, and A. S. Byström. "Mutational analysis of conserved positions potentially important for initiator tRNA function in Saccharomyces cerevisiae." Molecular and Cellular Biology 12, no. 4 (1992): 1432–42. http://dx.doi.org/10.1128/mcb.12.4.1432-1442.1992.
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The conserved positions of the eukaryotic cytoplasmic initiator tRNA have been suggested to be important for the initiation of protein synthesis. However, the role of these positions is not known. We describe in this report a functional analysis of the yeast initiator methionine tRNA (tRNA(iMet)), using a novel in vivo assay system which is not dependent on suppressor tRNAs. Strains of Saccharomyces cerevisiae with null alleles of the four initiator methionine tRNA (IMT) genes were constructed. Consequently, growth of these strains was dependent on tRNA(iMet) encoded from a plasmid-derived gene. We used these strains to investigate the significance of the conserved nucleosides of yeast tRNA(iMet) in vivo. Nucleotide substitutions corresponding to the nucleosides of the yeast elongator methionine tRNA (tRNA(MMet)) have been made at all conserved positions to identify the positions that are important for tRNA(iMet) to function in the initiation process. Surprisingly, nucleoside changes in base pairs 3-70, 12-23, 31-39, and 29-41, as well as expanding loop I by inserting an A at position 17 (A17) had no effect on the tester strain. Nucleotide substitutions in positions 54 and 60 to cytidines and guanosines (C54, G54, C60, and G60) did not prevent cell growth. In contrast, the double mutation U/rT54C60 blocked cell growth, and changing the A-U base pair 1-72 to a G-C base pair was deleterious to the cell, although these tRNAs were synthesized and accepted methionine in vitro. From our data, we suggest that an A-U base pair in position 1-72 is important for tRNA(iMet) function, that the hypothetical requirement for adenosines at positions 54 and 60 is invalid, and that a U/rT at position 54 is an antideterminant distinguishing an elongator from an initiator tRNA in the initiation of translation.
9
von Pawel-Rammingen, U., S. Aström, and A. S. Byström. "Mutational analysis of conserved positions potentially important for initiator tRNA function in Saccharomyces cerevisiae." Molecular and Cellular Biology 12, no. 4 (1992): 1432–42. http://dx.doi.org/10.1128/mcb.12.4.1432.
Full textAbstract:
The conserved positions of the eukaryotic cytoplasmic initiator tRNA have been suggested to be important for the initiation of protein synthesis. However, the role of these positions is not known. We describe in this report a functional analysis of the yeast initiator methionine tRNA (tRNA(iMet)), using a novel in vivo assay system which is not dependent on suppressor tRNAs. Strains of Saccharomyces cerevisiae with null alleles of the four initiator methionine tRNA (IMT) genes were constructed. Consequently, growth of these strains was dependent on tRNA(iMet) encoded from a plasmid-derived gene. We used these strains to investigate the significance of the conserved nucleosides of yeast tRNA(iMet) in vivo. Nucleotide substitutions corresponding to the nucleosides of the yeast elongator methionine tRNA (tRNA(MMet)) have been made at all conserved positions to identify the positions that are important for tRNA(iMet) to function in the initiation process. Surprisingly, nucleoside changes in base pairs 3-70, 12-23, 31-39, and 29-41, as well as expanding loop I by inserting an A at position 17 (A17) had no effect on the tester strain. Nucleotide substitutions in positions 54 and 60 to cytidines and guanosines (C54, G54, C60, and G60) did not prevent cell growth. In contrast, the double mutation U/rT54C60 blocked cell growth, and changing the A-U base pair 1-72 to a G-C base pair was deleterious to the cell, although these tRNAs were synthesized and accepted methionine in vitro. From our data, we suggest that an A-U base pair in position 1-72 is important for tRNA(iMet) function, that the hypothetical requirement for adenosines at positions 54 and 60 is invalid, and that a U/rT at position 54 is an antideterminant distinguishing an elongator from an initiator tRNA in the initiation of translation.
10
Mao, Hong Lu, Pei Zhi Zhuang, Ya Nan Zang, and Xiao Ming Yi. "Stress Characteristic Analysis of Repaving Asphalt Pavement Structure on Old Cement Road." Advanced Materials Research 594-597 (November 2012): 1377–81. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1377.
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To solve the early destruction problems occurred when overlaying asphalt pavement structure containing semi-rigid base on broken cement concrete pavement, finite element software is used to compare the stress characters between the repaving pavement and ordinary pavement, and analyze the repaving structures under different loads and different road transverse grade. It shows that the value of compressive stress at the top of base of repaving pavement is significantly higher than that of ordinary pavement, meanwhile, its value of tensile stress of base bottom is lower; the asphalt surface and new base top of repaving pavement need to bare a high value of shear stress and compressive stress under overload, so it’s prone to splitting failure in the base. With the increase of transverse grade, both the shear stress difference of road surface and maximum vertical compressive at top of the base increase in a lower position, but the situation is opposite in the higher position.
11
Li, Qingsong, Yi Dong, Dingjie Wang, Jie Wu, and Liang Zhang. "Real-Time Precise DGNSS/INS Integrated Relative Positioning with High Output Rate and Low Broadcast Rate for Kinematic-to-Kinematic Applications." Remote Sensing 14, no. 9 (2022): 2053. http://dx.doi.org/10.3390/rs14092053.
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High-output-rate relative positions are required for high-speed safety-critical kinematic-to-kinematic applications such as pre-crash sensing and shipboard landing. We propose a real-time, high-output-rate relative positioning method based on the integration of a real time kinematic (RTK) differential global navigation satellite systems (DGNSS) relative positioning algorithm, carrier-phase-based tightly coupled GNSS/Inertial navigation system (TC-GNSS/INS) integration algorithm and polynomial prediction algorithm for position increment. We focus on the rarely studied issue that data broadcast rates and sampling rates have effects on the integrated relative positioning accuracy under different motion states of a moving base. A vehicle-to-vehicle field test with a frequently turning base demonstrates the advantages of the proposed method, such as low bit rate of broadcast data, high output rate of position solutions and excellent real-time tolerance of latency. The results show that compared with the 10-Hz output of sole RTK DGNSS relative positioning, the proposed method can provide centimeter-level-accuracy relative positions at an output rate of 125 Hz with a sampling rate of 1 Hz, and the bit rate can be reduced by 83.12%. A UAV-to-boat field test with straight-line-motion moving base is then carried out to validate the applicability of the proposed system for aircraft applications. The results show that the broadcast rate of position increments of the moving base can be further reduced.
12
Li, Qingsong, Yi Dong, Dingjie Wang, Jie Wu, and Liang Zhang. "Real-Time Precise DGNSS/INS Integrated Relative Positioning with High Output Rate and Low Broadcast Rate for Kinematic-to-Kinematic Applications." Remote Sensing 14, no. 9 (2022): 2053. http://dx.doi.org/10.3390/rs14092053.
Full textAbstract:
High-output-rate relative positions are required for high-speed safety-critical kinematic-to-kinematic applications such as pre-crash sensing and shipboard landing. We propose a real-time, high-output-rate relative positioning method based on the integration of a real time kinematic (RTK) differential global navigation satellite systems (DGNSS) relative positioning algorithm, carrier-phase-based tightly coupled GNSS/Inertial navigation system (TC-GNSS/INS) integration algorithm and polynomial prediction algorithm for position increment. We focus on the rarely studied issue that data broadcast rates and sampling rates have effects on the integrated relative positioning accuracy under different motion states of a moving base. A vehicle-to-vehicle field test with a frequently turning base demonstrates the advantages of the proposed method, such as low bit rate of broadcast data, high output rate of position solutions and excellent real-time tolerance of latency. The results show that compared with the 10-Hz output of sole RTK DGNSS relative positioning, the proposed method can provide centimeter-level-accuracy relative positions at an output rate of 125 Hz with a sampling rate of 1 Hz, and the bit rate can be reduced by 83.12%. A UAV-to-boat field test with straight-line-motion moving base is then carried out to validate the applicability of the proposed system for aircraft applications. The results show that the broadcast rate of position increments of the moving base can be further reduced.
13
Li, Qingsong, Yi Dong, Dingjie Wang, Jie Wu, and Liang Zhang. "Real-Time Precise DGNSS/INS Integrated Relative Positioning with High Output Rate and Low Broadcast Rate for Kinematic-to-Kinematic Applications." Remote Sensing 14, no. 9 (2022): 2053. http://dx.doi.org/10.3390/rs14092053.
Full textAbstract:
High-output-rate relative positions are required for high-speed safety-critical kinematic-to-kinematic applications such as pre-crash sensing and shipboard landing. We propose a real-time, high-output-rate relative positioning method based on the integration of a real time kinematic (RTK) differential global navigation satellite systems (DGNSS) relative positioning algorithm, carrier-phase-based tightly coupled GNSS/Inertial navigation system (TC-GNSS/INS) integration algorithm and polynomial prediction algorithm for position increment. We focus on the rarely studied issue that data broadcast rates and sampling rates have effects on the integrated relative positioning accuracy under different motion states of a moving base. A vehicle-to-vehicle field test with a frequently turning base demonstrates the advantages of the proposed method, such as low bit rate of broadcast data, high output rate of position solutions and excellent real-time tolerance of latency. The results show that compared with the 10-Hz output of sole RTK DGNSS relative positioning, the proposed method can provide centimeter-level-accuracy relative positions at an output rate of 125 Hz with a sampling rate of 1 Hz, and the bit rate can be reduced by 83.12%. A UAV-to-boat field test with straight-line-motion moving base is then carried out to validate the applicability of the proposed system for aircraft applications. The results show that the broadcast rate of position increments of the moving base can be further reduced.
14
Montoli, Arianna, Alessandro Dimasi, Miriana Guarnaccia, et al. "Mechanistic insights into the base-mediated deuteration of pyridyl phosphonium and ammonium salts." RSC Advances 15, no. 2 (2025): 870–74. https://doi.org/10.1039/d4ra07557a.
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Base-catalyzed deuterations have been studied, computationally and experimentally, using a series of pyridyl salts with a temporary electron-withdrawing group to block the para-position while increasing the acidity in the other positions.
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Kasimov, Dr Khayrullo S. "THE POSITION OF THE ARTIST IN MODERN SOCIETY." American Journal Of Social Sciences And Humanity Research 03, no. 04 (2023): 10–13. http://dx.doi.org/10.37547/ajsshr/volume03issue04-03.
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The article shows that under the influence of the position of the artist in modern society, worldview, spiritual and moral creative aspects, realism was formed as the main base in the painting of Uzbekistan, that classical artists who have a personal method of work have been filling it with their creativity, that in the years of independence, the realist direction was manifested in the prolific work of the old and middle generation artists.
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Störzer, Melanie, and Britta Stolterfoht. "Syntactic base positions for adjuncts? Psycholinguistic studies on frame and sentence adverbials." Questions and Answers in Linguistics 1, no. 2 (2013): 57–72. http://dx.doi.org/10.1515/qal-2015-0004.
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Abstract Syntactic approaches to the positioning of adjuncts (e.g., Frey and Pittner (1998), Maienborn (2001), Frey (2003), Pittner (2004), Steube (2006)) postulate base positions for frame as well as for sentence adverbials above the entire proposition. The question arises how these two adverbial types are positioned in relation to each other. Syntactic accounts respond differently to this question. Furthermore, the role of semantic and pragmatic factors for the positioning of adverbials is disputable. The current paper presents the results of two psycholinguistic experiments that provide evidence for a base position account of frame and sentence adverbials. Furthermore, a non-syntactic factor - namely the referentiality of frame adverbials - is shown to influence position preferences.
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Chankova, Yana. "“GIVING SOMEONE FREEDOM” IN OLD ICELANDIC IN MINIMALIST SYNTACTIC TERMS." Ezikov Svyat (Orbis Linguarum), ezs.swu.v21i3 (October 30, 2023): 7–19. http://dx.doi.org/10.37708/ezs.swu.bg.v21i3.1.
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The present paper discusses the word order alternatives attested with OIce double object constructions of the type gefa einhverjum frelsi ‘give someone freedom’ found in the ONP (https://onp.ku.dk/onp/onp.php) within a largely Minimalist syntactic framework (Chomsky (1995) and beyond). Specifically, this study draws on theoretical assumptions borrowed from sources in the area of the movement approach to modified word order types in the early Germanic languages (e.g. Eythórsson (1995); Haugan (2001)). The paper starts off with an analysis of base-generated post-VP indirect object (Dat) – frelsi (Acc) order and proceeds to an account of modified orders derived by VP-internal Scrambling, short-distance Scrambling, and Topicalization, wherein the direct object frelsi is claimed to have moved leftwards from its base position. The author of the paper argues that leftward dislocation takes frelsi to various target positions, i.e. an adjunction position in the left periphery of VP (resulting from VP-internal Scrambling), an adjunction position in the left periphery of vP (as a result of shortdistance Scrambling), the specifier position of CP (consequent upon Topicalization). The objective of the paper is to analyze the conditions, under which the above displacement operations apply, the structural configurations, derived by leftward movement and the properties of the ex-situ positions, targeted by frelsi.
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Lee, Kim, and Kim. "Experimental Study on Forced Convection Heat Transfer from Plate-Fin Heat Sinks with Partial Heating." Processes 7, no. 10 (2019): 772. http://dx.doi.org/10.3390/pr7100772.
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In this study, plate-fin heat sinks with partial heating under forced convection were experimentally investigated. The base temperature profiles of the plate-fin heat sinks were measured for various heating lengths, heating positions, flow rates, and channel widths. From the experimental data, the effects of heating length, heating position, and flow rate on the base temperature profile and the thermal performance were investigated. Finally, the characteristics of the optimal heating position were investigated. As a result, it was shown that the optimal heating position was on the upstream side in the case of the heat sinks under laminar developing flow, as opposed to the heat sinks under turbulent flow. It was also shown that the optimal heating position could change significantly due to heat losses through the front and back of the heat sink, while the effects of the heat loss through the sides of the heat sink on the optimal heating position were negligible. In addition, it was shown that the one-dimensional numerical model with empirical coefficients could predict the important trends in the measured temperature profiles, thermal resistances, and optimal heating lengths.
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Meghavathu, Roopa, and Rao N. Mohan. "Multi-position and orientation analysis of spatial parallel manipulator using DE algorithm." i-manager’s Journal on Future Engineering and Technology 19, no. 2 (2024): 10. http://dx.doi.org/10.26634/jfet.19.2.20292.
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Differential Evolution (DE) is an informative and direct approach to optimization with limited control parameters. This paper presents a multi-position and orientation analysis of a Spatial Parallel Manipulator considering the influence of physical constraints, such as limb lengths and spherical joint motion. The synthesis process primarily involves determining the scopes of the permanent base and movable platform relative to the axes of the revolute joints, enabling the moving platform to traverse a predetermined range of positions. The dimensions of the moving platform and fixed base are determined by considering restrictions on joint motion to design the parallel manipulator using the DE algorithm method. The synthesis procedure is illustrated with a numerical example involving eight positions.
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Wagner, Ann E., William W. Muir, and Beverly J. Grospitch. "Cardiopulmonary effects of position in conscious cattle." American Journal of Veterinary Research 51, no. 1 (1990): 7–10. http://dx.doi.org/10.2460/ajvr.1990.51.01.7.
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SUMMARY The cardiopulmonary effects of 4 positions (standing, right lateral, left lateral, and dorsal recumbency) were evaluated in conscious cattle in which no sedatives or anesthetic drugs were given. Each position was maintained for 30 minutes, during which time there were no significant changes in heart rate, respiratory rate, mean arterial blood pressure, arterial pH, PaCO2, arterial base excess, or venous blood gas values. Significant decreases in PaO2 developed when cattle were in lateral positions and dorsal recumbency. Cardiac index was unchanged in all positions, except in dorsal recumbency at 30 minutes, when it was significantly decreased.
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Sugiyatno, A., H. Ashari, T. G. Aji, and Hardiyanto. "Effect of bud position on the seedling growth of five citrus species." IOP Conference Series: Earth and Environmental Science 1133, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1755-1315/1133/1/012004.
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Abstract This research aimed to evaluate the bud position in the vegetative phase of seedling growth derived from five citrus species. The research was carried out from April to July 2018 at the Tlekung Agricultural Research Installation. Factorial Randomized Block Design with two factors is the method in this study. The bud position taken as the propagation material was the first factor consisting of the top (36-50 cm from the base part of tree), middle (16-35 cm from the base part of tree), and bottom (0-15 cm from the base part of tree). The second factor was the citrus species consisting of mandarin cv. Madura, tangerine cv. Pontianak, pummelo cv. Giri Matang, lime cv. Sweet, and orange cv. Punten. There was no significant interaction between the bud position and species on all variables. However, regardless of bud position, citrus species showed significantly different in vegetative growth. The best average of 100% for the success of bud grafting, 36.89 days after bud grafting for the budburst time, 4.5 mm for the shoot diameter, 29.81 cm for the shoot length, and 19.55 leaves for the number of leaves was shown by orange cv. Punten. The results of this research sugges that the use of buds taken from different positions is recommended for citrus grafted bud.
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Tankeliun, Tomas, Oleg Zaytsev, and Vytautas Urbanavicius. "Hybrid Time-Base Device for Coherent Sampling Oscilloscope." Measurement Science Review 19, no. 3 (2019): 93–100. http://dx.doi.org/10.2478/msr-2019-0015.
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Abstract In this paper, a hybrid time-base (HTB) device for the coherent sampling oscilloscope is presented. The HTB device makes it possible to reduce the uncertainty of determining the time position of the sample in the horizontal channel of the sampling oscilloscope. For its functioning, the proposed HTB device requires that the system-under-test, in addition to the test signal, also has a synchronous reference clock – harmonic oscillation. It should be noted that both the test signal and the harmonic reference clock are sampled simultaneously. The harmonic reference clock is connected to one of the oscilloscope channels and a special algorithm processes the clock samples and adjusts the coherent sampling mode. Two techniques of determining the position of the sample on the time axis are combined in the HTB device – the “trigonometric”, when the position is calculated by the arccosine or arcsine formula of the reference clock sampling value, and the interpolation method, according to which the time position of the sample is found by averaging the positions of two adjacent samples, obtained using said “trigonometric” technique. Primary experimental studies have shown that using the HTB device can reduce jitter of the sampling oscilloscope by several times and the drift with constant time distortion components is practically absent in this device.
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Ren, Rui. "A Distributed Algorithm Based on RSSI for Intelligent Vehicle Localization." Applied Mechanics and Materials 239-240 (December 2012): 1561–64. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.1561.
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Wireless sensor network is added on traditional GPS to realize double location in this paper. The widely used distributed distance measure algorithm of RSSI based in wireless sensor network is adopted. At the beginning work of this position system, unknown position node A broadcast its localization request, after all the base node received this request, they reply node A with its own location info and the RSSI value from other base node. Node A select the most closest base node as base to determine his own location, moreover, distance between base node and signal strength is take as reference to adjust the weight value of every base node, then the precise position is got after final calculation. In the end, precise of this algorithm is proved by simulation experiment.
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Aravindu, Kunche, Masahiko Taniguchi, David F. Bocian, and Jonathan S. Lindsey. "Synthesis of (oxo)chlorin dimers chelated with thallium(III)." Journal of Porphyrins and Phthalocyanines 28, no. 08 (2024): 527–35. http://dx.doi.org/10.1142/s1088424624500548.
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Two target dimers have been prepared for fundamental studies of hole/electron transfer. Metalation with thallium(III) enables clocking of the rate of hole/electron transfer between the two macrocycles. Each dimer contains a diphenylethyne linker joining two identical hydroporphyrins (chlorin or oxochlorin). The linker is substituted at the 4,4′-positions whereas each (oxo)chlorin is joined at the 10-position. Each (oxo)chlorin is equipped with a gem-dimethyl group at the 18-position to stabilize the hydroporphyrin chromophore toward adventitious dehydrogenation and a 3,5-di-tert-butyl group at the 5-position to achieve increased solubilization in organic media. The dimers parallel a prior set of diphenylethyne-linked (oxo)chlorin constructs containing zinc-free base, zinc-zinc, and copper-copper metalation states that have been examined in studies of electronic communication. The building block (oxo)chlorins for preparing the thallium-containing dimers have been prepared in quantities of 32–404 mg, a scale up to 14-fold larger than previously. Thallation of the free base (oxo)chlorin dimers was achieved with excess TlCl3⋅4H2O in CH2Cl2/CH3OH (3–4:1) upon overnight reaction at room temperature. The long-wavelength (Q[Formula: see text] absorption band of (oxo)chlorins lies between that of the zinc(II) and free base counterparts. Absorption spectral comparisons are provided of the thallium(III) and free base (oxo)chlorin monomers and dimers.
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Siregar, Mansur, Devi Andriani Luta, and Najla Lubis. "Increasing the Growth and Quality of Oil Palm Seeds (Elaeis guineensis Jacq) by Selecting the Position of Fruit Bunches and Dormancy Breaking Methods." JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) 5, no. 2 (2023): 311–21. http://dx.doi.org/10.36378/juatika.v5i2.3112.
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Oil palm reproduces by seeds and will germinate to grow further into plants. This study aims to determine the effect of the position of fruit bunches and various methods of breaking dormancy on the germination of coconut seeds palm. This study used a completely randomized design (CRD) factorial consisting of 2 factors with 18 combinations and 2 replications. The first factor is the position of the fruit on the oil palm bunch which consists of 6 positions of the fruit bunch, as follows: the base of the inner fruit bunch (PT), the base of the outer fruit bunch (PL), the middle of the inner fruit bunch (TD), the middle of the inner fruit bunch outer (TL), inner fruit bunch tip (UD), outer fruit bunch tip (UL) The second factor is various methods of breaking dormancy with the symbol (P), namely Ecoenzyme Soaking (P1), Gibberellin Soaking (P2), oven system ( P3). Parameters observed included germination rate (%), percentage of normal sprouts (%), percentage of abnormal sprouts (%), radicle exit age (days), plumule exit age (days), radicle length (cm) and plumule length (cm). The results showed that the position of the oil palm fruit bunches and the dormancy breaking method gave a significant response to the germination parameters of 53.33% (fruit bunches) 49.33% (oven system), normal germination percentage 43.33% (fruit bunches) 38.89% (oven system), radicle exit age 36 days (bundle position) 37.17 days (oven system), plumule exit age 54.67 days (fruit bunches) 59.25 days (oven system), radicle length 1.98 cm (bunch position) 1.60 cm (oven system), and plumule length 1.78 cm (bunch position) 1.42 cm (oven system) and gave no significant response to the percentage of abnormal sprouts (%). The best treatment was the position of the deep base fruit bunches and oven system
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Phillips, John C. "The Integration of Central Positions in Baseball: The Black Shortstop." Sociology of Sport Journal 8, no. 2 (1991): 161–67. http://dx.doi.org/10.1123/ssj.8.2.161.
Full textAbstract:
Earlier work (Phillips, 1983) showed limited or no progress in the accessibility of central positions (catcher, shortstop, second base) to black professional baseball aspirants. A closer examination of the data reveals an interesting change during the past two decades. Blacks came to appear in numbers at second base in the mid-1970s and at shortstop during the 1976-1986 decade, but this progress was obscured when the three central positions were combined. Separation of the three positions reveals a clear pattern of progress in accessibility, first at second base, the least central of the central positions, then at shortstop, but not yet at catcher, the most central position. Another pattern of discrimination, exclusion of weak-hitting black players in favor of weak-hitting white players, seems to have disappeared. Some theoretical and practical implications of this apparent decline in discrimination are discussed.
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Silva, Patrícia A. G. C., Richard Molenkamp, Tim J. Dalebout, et al. "Conservation of the pentanucleotide motif at the top of the yellow fever virus 17D 3′ stem–loop structure is not required for replication." Journal of General Virology 88, no. 6 (2007): 1738–47. http://dx.doi.org/10.1099/vir.0.82811-0.
Full textAbstract:
The pentanucleotide (PN) sequence 5′-CACAG-3′ at the top of the 3′ stem–loop structure of the flavivirus genome is well conserved in the arthropod-borne viruses but is more variable in flaviviruses with no known vector. In this study, the sequence requirements of the PN motif for yellow fever virus 17D (YFV) replication were determined. In general, individual mutations at either the second, third or fourth positions were tolerated and resulted in replication-competent virus. Mutations at the fifth position were lethal. Base pairing of the nucleotide at the first position of the PN motif and a nucleotide four positions downstream of the PN (ninth position) was a major determinant for replication. Despite the fact that the majority of the PN mutants were able to replicate efficiently, they were outcompeted by parental YFV-17D virus following repeated passages in double-infected cell cultures. Surprisingly, some of the virus mutants at the first and/or the ninth position that maintained the possibility of forming a base pair were found to have a similar fitness to YFV-17D under these conditions. Overall, these experiments suggest that YFV is less dependent on sequence conservation of the PN motif for replication in animal cells than West Nile virus. However, in animal cell culture, YFV has a preference for the wt CACAG PN sequence. The molecular mechanisms behind this preference remain to be elucidated.
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Zhang, Wen Hui. "Adaptive Neural Network Control for X-Y NC Position Table." Key Engineering Materials 589-590 (October 2013): 654–57. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.654.
Full textAbstract:
An adaptive neural network control scheme for X-Y position table is proposed by the paper. X-Y position table model is established, controller based on neutral network is used to learn adaptive and compensate uncertainty model of X-Y position table, neutral network is used to study model. Neural network parameters base on stochastic gradient algorithm can be adjusted adaptive on line. Neural network controller base on augmented variable method is designed.
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Gustina, Mara, Widjijono Widjijono, and Endang Wahyuningtyas. "Enhancing the impact strength of acrylic resin base plate by adding non-dental E-glass fiber." Majalah Kedokteran Gigi Indonesia 6, no. 2 (2021): 106. http://dx.doi.org/10.22146/majkedgiind.42939.
Full textAbstract:
Non-dental glass fiber is one of the materials that can be used to increase the impact strength of a acrylic resin base plate, containing a similar composition to that of dental e-glass fiber. Orientation and positions of fiber affect the reinforcement effectiveness. This research aimed to examine the effect of the orientation of non-dental glass fiber in the compression position on the impact strength of an acrylic resin base plate. The research was conducted on 16 acrylic resin plates with fiber (65 mm x 10 mm x 2.5 mm) addition. The samples were divided into 4 groups (combination of different woven orientation unidirectional, bidirectional woven in the compression position, and control). The material used in this study was heat-cured acrylic resin QC-20 brand, non-dental glass fiber (without any brand). Impact strength was tested using an impact testing machine. The data obtained were analyzed using one-way ANOVA test and LSD (p<0.05). In this research the impact strength of the base plate with the addition of fiber increased 8.54 ± 2.21; 13.21 ± 2.34; 16.81 ± 2.80 kJ/m2 compared to that of the control group, i.e. 4.98 ± 1.05 kJ/m2. One-way ANOVA test showed a significant effect (p<0.05) of the fiber orientation variations on the compression position. This research concluded that the addition of nondental e-glass fiber (composed of SiO252.56-56.88%), diameter 17.12–20.03 µm) in the compression zone increases theimpact strength of acrylic resin base plate. Fibers with unidirectional orientationprovides the highest increase in the impact strength of acrylic resin base plate.
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Wang, Aiqing. "Wh-P and the Intervention Effect of negation." International Journal of Language and Literary Studies 3, no. 1 (2021): 12–36. http://dx.doi.org/10.36892/ijlls.v3i1.477.
Full textAbstract:
Following the Government and Binding theory mainly developed by Chomsky (1981, 1982, 1986), I explore wh-P and the Intervention Effect of negation in Late Archaic Chinese (LAC). I propose that the inverted order of wh-P in LAC is generated via PP inversion followed by the separate preposing of wh and P. The wh-complement raises to [Spec, PP] and further moves to the specifier position of a functional projection. If the wh-PP is base-generated preverbally, the preposition moves to the head position of the functional projection directly; if the wh-PP is base-generated postverbally, the preposition must first incorporate to a V0 and then move to the head position of the functional projection through excorporation. In terms of the Intervention Effect, wh-arguments and adverbials that usually move to the Low focus position below negation are subject to a blocking effect caused by negation, so these wh-phrases have to land in the High focus position above negation which is expected to accommodate ‘high’ adverbials exclusively. I argue that the Intervention Effect in LAC is a consequence of Q-binding as feature movement of [wh], interacting with fronting into the hierarchy of clause-internal positions driven by [Focus] feature.
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Buttyán, Levente, and Péter Schaffer. "Position-Based Aggregator Node Election in Wireless Sensor Networks." International Journal of Distributed Sensor Networks 6, no. 1 (2010): 679205. http://dx.doi.org/10.1155/2010/679205.
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We introduce PANEL a position-based aggregator node election protocol for wireless sensor networks. The novelty of PANEL with respect to other aggregator node election protocols is that it supports asynchronous sensor network applications where the sensor readings are fetched by the base stations after some delay. In particular, the motivation for the design of PANEL was to support reliable and persistent data storage applications, such as TinyPEDS; see the study by Girao et al. (2007). PANEL ensures load balancing, and it supports intra and intercluster routing allowing sensor-to-aggregator, aggregator-to-aggregator, base station-to-aggregator, and aggregator to-base station communications. We also compare PANEL with HEED; see the study by Younis and Fahmy (2004) in the simulation environment provided by TOSSIM, and show that, on one hand, PANEL creates more cohesive clusters than HEED, and, on the other hand, that PANEL is more energy efficient than HEED.
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Jha, Anil Chandra. "Positional Number System." NUTA Journal 7, no. 1-2 (2020): 1–9. http://dx.doi.org/10.3126/nutaj.v7i1-2.39924.
Full textAbstract:
In a positional number system, the numerical value of each symbol depends on its position in the sequence of digits representing the number. Any integer greater than 1 may serve as a base, and in a base b system there are b digits represented conventionally by the digits 0,1,2,..., b-1. In this paper we introduce the following four positional number systems: decimal (base-10), binary (base-2), Octal (base-8) and hexadecimal (base-16). We focus on representations of these number systems together with arithmetical operations defined on them. The study of this paper ends with the conversions of number from one system into another with examples.
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Meier, Taylor, Brice Snyder, Jennifer W. Cuchna, and Johanna M. Hoch. "Serratus Anterior Muscle Activation During Different Push-up Exercises: A Critically Appraised Topic." International Journal of Athletic Therapy and Training 20, no. 2 (2015): 5–13. http://dx.doi.org/10.1123/ijatt.2014-0047.
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Clinical Question:In a healthy adult population, which push-up position produces the greatest mean serratus anterior (SA) activation, expressed as a percentage of maximum voluntary isometric contraction (MVIC)?Clinical Bottom Line:In a healthy population, there is moderate evidence to support the use of the standard push-up on an unstable surface, elbow push-ups on stable and unstable surfaces, wall push-ups on an unstable surface, the full weight-bearing position using the Cuff Link system, and all three hand positions (shoulder width, wide base, and narrow base) with and without the use of the Perfect Pushup™ handgrips for the purpose of SA strengthening. These exercises produced a mean SA activation of at least 50% of the MVIC in the four cross-sectional studies that were reviewed for this critically appraised topic.
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Muhanniah. "Quality Test of Hybrid Corn Seeds Based on the Position of the Seeds on the Cob with a Comparison of the Parental Ratios that Have Been Applied with Trichoderma sp." Jurnal Penelitian Pendidikan IPA 10, SpecialIssue (2024): 215–25. http://dx.doi.org/10.29303/jppipa.v10ispecialissue.8057.
Full textAbstract:
Seeds are a means of production whose quality must be guaranteed and maintained. The seed production, quality testing is an important part. This research aims to determine the effect of seed position on the cob, ratio comparison, and application of Trichoderma sp. on the quality of hybrid corn seeds. This research was carried out in BALITSEREAL, Maros Regency from September to October 2018. This research used a 3-factor factorial design method with a Completely Randomized Basic Design with each treatment combination consisting of 3 replications. The results showed that the position of the base seed had an effect on PK 11.63cm, JAS 4.51. The position of the middle seed has an effect on BKKN 12.31g, DHL 8.19 (cm-2). A ratio of 1:2 has an effect on a JAS of 4.47. A ratio of 1:3 has an effect on a PAP of 16.84cm. Trichoderma sp. 108 has an effect on DHL 9.56 (cm-2). The interaction of the position of the middle seed with a ratio of 1:2 has an effect on BKKN 12.85g. The interaction of base seed position with a ratio of 1:2 has an effect on JAS 4.77. The interaction of base seed position with a ratio of 1:3 had an effect on DB of 99.33%. The interaction between middle seed position and Trichoderma sp. 104 has an effect on BKKN 12.89g. The interaction between seed base position and Trichoderma sp. 104 had an effect on JAS 4.83, PK 12.29cm. The interaction ratio of 1:3 with Trichoderma sp. 10 4 has an effect on BKKN 12.39g. The interaction ratio of 1:3 with Trichoderma sp.10 8 has an effect on PK 11.82cm. The interaction ratio of 1:2 with Trichoderma sp.10 8 has an effect on JAS I4.86, DHL 8.97 (cm-2). Interaction of seed base position, ratio 1:2 and Trichoderma sp. 108 has an effect on JAS 5.60. The interaction of base seed position, ratio 1:3 and Trichoderma sp.10 8 has an effect on PK 13.15cm. Interaction of middle seed position, ratio 1:3 and Trichoderma sp. 10 4 has an effect on BKKN 13.80g on the quality of hybrid corn seeds.
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Poudel, P., and S. Dahal. "Cephalometric Assessment of Condylar Position among Individuals with Different Skeletal Malocclusion Patterns." Journal of Nepalese Prosthodontic Society 6, no. 1 (2023): 18–26. http://dx.doi.org/10.3126/jnprossoc.v6i1.58350.
Full textAbstract:
Introduction: There are variations in growth and orientation of cranial base region where the maxilla and mandible articulate. This leads to differential movement of the maxilla and mandible causing changes in glenoid fossa and condylar position. Therefore, this study was conducted to determine the condylar position in patients with different skeletal sagittal malocclusion patterns. Methods: An analytical cross-sectional study was conducted among 165 individuals, having skeletal Class I, Class II and Class III relationship (55 in each group) selected by convenience sampling method after receiving ethical approval and informed consent. Lateral cephalograms were taken and measurements for determining condylar position were done and compared among three groups. Data were analyzed in SPSS version 16. Kruskal-Wallis H test was used to determine the mean difference in between condylar positions of three skeletal malocclusion patterns and Mann-Whitney U test was done for their pairwise comparison. Results: There was no significant difference in posterior cranial base length (P=0.200) and saddle angle (P=0.517) in three skeletal malocclusion class groups. However, the three malocclusion patterns showed significant differences in gonian angle (P=0.001) and articular angle (P=0.013). Significant moderate negative correlation in saddle angle and articular angle (P<0.001) was observed. Conclusion: The findings of this study concluded that condylar position based on posterior cranial base length was not associated with different skeletal malocclusion patterns. However, articular angle was significantly lower in skeletal class III than in class II.
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Sidorova, E. A., O. N. Vaganova, and A. Yu Slastenin. "Methods for determining the position of the curve in the plan and the influence of the geometry of the track on the indicators of interaction between the track and the rolling stock." VNIIZHT Scientific Journal 79, no. 6 (2021): 365–72. http://dx.doi.org/10.21780/2223-9731-2020-79-6-365-372.
Full textAbstract:
The article substantiates the necessity of supplementing the existing estimate of the track position in the plan by the difference of adjacent bending arrows with an estimate of deviations from the fixed initial position, which ensures the constancy of the characteristics of a single-radius curve or the components of a multi-radius curve along their entire length. As a fixed initial position of the reference base (base position), it is proposed to accept the design position or the position of the track after the repair performed according to the project, and in the absence of the project, the calculated position obtained using verified programs. The question of determining the values of the deviation of the position of the curves at individual points from the base position and their ranking for different variants of recording the curves is considered. As possible options for surveying are considered Geodetic measurement methods using Cartesian and polar coordinate systems, methods of obtaining information from transformed data from sensors of track measuring cars, as well as the classical method of measuring the arrows of the bend of a curve.The article presents the results of calculating the indicators of the interaction between the track and the rolling stock (frame and horizontal transverse forces, lateral deflections of rails) when modeling the motion of a freight car along curves, the parameters of which were obtained on the basis of analysis of data from experimental sections. The calculation results are correlated with the analyzed data on the presence of deviations from the base position in the curves.
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Hensen, Karl, Alexander Lemke, and Michael Bolte. "Lewis-Säure/Base Addukte von TiCl4 und Methylpyridinen / Lewis Acid/Base Adducts of TiCl4 and Methylpyridines." Zeitschrift für Naturforschung B 55, no. 9 (2000): 877–81. http://dx.doi.org/10.1515/znb-2000-0912.
Full textAbstract:
By the reaction of 2-methyl- and 2,6-dimethylpyridine the first neutral TiCl4L complexes (L = single bonded ligand) could be synthesized. The structures have been determined by single crystal X-ray methods. The best description of the molecular structure is a distorted trigonal bipyramid with the nitrogen base occupying an equatorial position. With 2,4-dimethylpyridine, a 1:2 adduct is formed, where the nitrogen bases are in trans-positions of a TiCl4N2-octahedron, as also confirmed by an X-ray analysis
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Wipusitwarakun, Komwut. "A Distributed Topology Adjustment Algorithm for Wireless Networks with Mobile Base Stations." ECTI Transactions on Electrical Engineering, Electronics, and Communications 7, no. 1 (2008): 24–33. http://dx.doi.org/10.37936/ecti-eec.200971.171801.
Full textAbstract:
Improper static network topology can reduce the capacity of wide area wireless access networks in which the distribution of subscribers' population often changes. This paper focuses on "fully wireless cellular networks" with mobile base stations, where the network topology can be dynamic due to the mobility of the base stations. In such environment, network topology can be properly controlled by the adjustment of mobile base stations' positions. A novel distributed topology adjustment algorithm is proposed in this paper. The proposed algorithm tracks subscriber's population by moving mobile base stations toward the center of their nearby groups of subscribers. At the same time, mobile base stations are also drawn outward their neighboring base stations in order to solve the "oversupply base station" problem. The balance between 2 movement forces determines the proper position of mobile base stations. The performance evaluation of the proposed algorithm shows that the proposed algorithm performs well, even in rapidly changes of subscribers' population or in the presence of failure of base stations.
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Urakawa, Hidetoshi, Peter A. Noble, Said El Fantroussi, John J. Kelly, and David A. Stahl. "Single-Base-Pair Discrimination of Terminal Mismatches by Using Oligonucleotide Microarrays and Neural Network Analyses." Applied and Environmental Microbiology 68, no. 1 (2002): 235–44. http://dx.doi.org/10.1128/aem.68.1.235-244.2002.
Full textAbstract:
ABSTRACT The effects of single-base-pair near-terminal and terminal mismatches on the dissociation temperature (T d) and signal intensity of short DNA duplexes were determined by using oligonucleotide microarrays and neural network (NN) analyses. Two perfect-match probes and 29 probes having a single-base-pair mismatch at positions 1 to 5 from the 5′ terminus of the probe were designed to target one of two short sequences representing 16S rRNA. Nonequilibrium dissociation rates (i.e., melting profiles) of all probe-target duplexes were determined simultaneously. Analysis of variance revealed that position of the mismatch, type of mismatch, and formamide concentration significantly affected the T d and signal intensity. Increasing the concentration of formamide in the washing buffer decreased the T d and signal intensity, and it decreased the variability of the signal. Although T ds of probe-target duplexes with mismatches in the first or second position were not significantly different from one another, duplexes with mismatches in the third to fifth positions had significantly lower T ds than those with mismatches in the first or second position. The trained NNs predicted the T d with high accuracies (R 2 = 0.93). However, the NNs predicted the signal intensity only moderately accurately (R 2 = 0.67), presumably due to increased noise in the signal intensity at low formamide concentrations. Sensitivity analysis revealed that the concentration of formamide explained most (75%) of the variability in T ds, followed by position of the mismatch (19%) and type of mismatch (6%). The results suggest that position of the mismatch at or near the 5′ terminus plays a greater role in determining the T d and signal intensity of duplexes than the type of mismatch.
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Ren, Shunan, Xiangdong Yang, Jing Xu, Guolei Wang, Ying Xie, and Ken Chen. "Determination of the base position and working area for mobile manipulators." Assembly Automation 36, no. 1 (2016): 80–88. http://dx.doi.org/10.1108/aa-11-2015-101.
Full textAbstract:
Purpose – The purpose of this paper is to determine the base position and the largest working area for mobile manipulators. The base position determines the workspace of the mobile manipulator, particularly when the operation mode is intermittent (i.e. the mobile platform stops when the manipulator conducts the task). When the base of the manipulator is in the intersection area of the Base’s Workable Location Spaces (BWLSes), the end effector (EE) can reach all path points. In this study, the intersection line of BWLSes is calculated numerically, and the largest working area is determined using the BWLS concept. The performance of this method is validated with simulations on specific surface segments, such as plane, cylinder and conical surface segments. Design/methodology/approach – The BWLS is used to determine the largest working area and the base position in which the mobile manipulator can reach all path points with the objective of reducing off-line planning time. Findings – Without considering the orientation of the EE, the base position and the working area for the mobile manipulator are determined using the BWLS. Compared to other methods, the proposed algorithm is beneficial when the planning problem has six dimensions, ensuring the reachability and stability of the EE. Originality/value – The algorithm needs no manual configuration, and its performance is investigated for typical surfaces in practical applications.
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Venegas, J. G., Y. Yamada, C. Burnham, and C. A. Hales. "Local gas transport in eucapnic ventilation: effects of gravity and breathing frequency." Journal of Applied Physiology 68, no. 6 (1990): 2287–95. http://dx.doi.org/10.1152/jappl.1990.68.6.2287.
Full textAbstract:
The effects of body position and respiratory frequency (f) on regional gas transport during eucapnic conventional ventilation (CV) and high-frequency ventilation (HFV) were assessed from the washout of nitrogen 13 (13NN) using positron-emission tomography. In one protocol, six dogs were ventilated with CV or HFV at f = 6 Hz and tidal volume (VT) selected supine for eucapnia. A coronal cross section of the lung base was studied in the supine, prone, and right and left lateral decubitus positions. In a second protocol, six dogs were studied prone: apical and basal cross sections were studied in CV and in HFV with f = 3 and 9 Hz at eucapnic VT. Regional alveolar ventilation per unit of lung volume (spVr) was calculated for selected regions and analyzed for gravity-dependent cephalocaudal and right-to-left gradients. In both CV and HFV, nonuniformity in spVr was highest supine and lowest prone. In CV there were vertical gradients of spVr in all body positions: nondependent less ventilated than dependent regions, particularly in the supine position. In HFV there was a moderate vertical gradient in spVr in addition to a preferentially ventilated central region in all body positions. Overall lung spV was unaffected by body position in CV but in HFV was highest supine and lowest prone. Nonuniformity in eucapnic prone HFV was unaffected by f and always higher than in CV.(ABSTRACT TRUNCATED AT 250 WORDS)
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Pritykin, Fedor Nikolaevich. "Using computer simulation of the hand movement of an anthropomorphic robot to determine the position of its base relative to objects of manipulation." Программные системы и вычислительные методы, no. 1 (January 2025): 1–12. https://doi.org/10.7256/2454-0714.2025.1.70232.
Full textAbstract:
The subject of the study is the use of an intelligent hand movement control system of an anthropomorphic robot when performing operations of placing objects of manipulation in a container of specified dimensions. The object of the study is the process of determining the parameters of the relative position of the base of the hand in relation to the objects of manipulation and the container, in which it is possible to perform motor tasks. The author examines in detail the algorithm for determining the position of the base of the arm of an anthropomorphic robot using the synthesis of movements along the velocity vector when solving the problem of installing manipulating objects specified in the form of rectangular prisms into a container. Special attention is paid in the article to the methodology of determining the center of the coordinate system associated with the base of the robot in a fixed space and calculating the target points to which the center of the output link moves at various positions of previously installed manipulation objects in the container. The essence of the method is to use computer simulation of the movement of an anthropomorphic robot using the synthesis of movements along the velocity vector with an assessment of the relative position of the arm mechanism and restricted areas. Previously installed manipulation objects located inside the container and the side walls of the container itself act as restricted areas. The main conclusions of the presented study are the possibility of using the developed algorithm to test the synthesis of hand movements with given geometric parameters that set the position of an anthropomorphic robot, conveyor and container, in which there is no occurrence of deadlocks. The novelty of the research consists in the development of a method based on an iterative search for the values of the parameters of the mutual position of the base of the arm, conveyor and container at each iteration in case of deadlock situations. The results of calculations of the position of the base of the robot arm and intermediate configurations constructed using computer simulation of movements based on the use of the developed algorithm are presented. The conducted research can be used in the development of information and control complexes of mobile objects, in particular in the development of intelligent control systems for autonomously functioning anthropomorphic robots in organized environments.
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Brown, Rebecca Nelson, and Peter D. Ascher. "452 PB 297 COTYLEDON POSITION AS A SPECIES CHARACTER IN PHASEOLUS." HortScience 29, no. 5 (1994): 496b—496. http://dx.doi.org/10.21273/hortsci.29.5.496b.
Full textAbstract:
The methods of Wall and York (1957) were used to measure cotyledon position in two populations of three species interspecific Phaseolus hybrids and in the single species cultivars and accessions of P. coccineus, P. acutifolius, and P. vulgaris used as parents. Cotyledon position was represented by the length of the epicotyl as a percentage of the total length of the seedling's stem from the first root initial to the base of the primary node. Progeny of interspecific crosses between P. coccineus and P. vulgaris have been shown to inherit the cotyledon position of the cytoplasmic parent. The objectives of this study were to determine if three species hybrids also inherited the cotyledon position of the cytoplasmic parent, and to determine if P. acutifolius could be distinguished from P. vulgaris by its cotyledon position. Results indicated that the cotyledon positions of the three species hybrids did not differ significantly from the cotyledon positions of cultivars of the species used as the cytoplasmic parent for both P. vulguris cytoplasm and P. coccineus cytoplasm. Further, the cotyledon position of the P. acutifolius accessions did differ significantly from the cotyledon positions of both the P. vulgaris cultivars and the three species hybrid with P. vulgaris cytoplasm. These results suggest that cotyledon position may indeed be a species-specific trait for Phaseolus in Lamprecht's sense of the term.
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Pittner, Karin. "Position and interpretation of adjuncts : process, event and 'wieder' 'again'." ZAS Papers in Linguistics 17 (January 1, 2000): 203–16. http://dx.doi.org/10.21248/zaspil.17.2000.47.
Full textAbstract:
This paper deals with restitutive and repetitive 'wieder'. Proceeding from the assumption that adverbial adjuncts have base positions which reflect their semantic relations to the rest of the sentence, it is shown that repetitive 'wieder' belongs to the class of event adverbs minimally c-commanding the base positions of all arguments whereas restitutive 'wieder' has many properties in common with process adjuncts, minimally c-commanding the final verb.
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Ковалев, Анатолий, and Anatoliy Kovalyev. "ENTERPRISE PROPERTY COMPLEX PROFIT POTENCIAL HARMONIZATION FROM THE POSITION OF VALUE ANALYSIS THEORY." Advances in management & marketing 1, no. 1 (2013): 18–21. http://dx.doi.org/10.12737/1468.
Full textAbstract:
The article suggests to use the profit potencial conception,
 well known from the value appraisal theory, at base value appraisal
 by profitable approach. Discount net profit method allows to determine
 enterprise property complex value as a whole. Farther from
 the find property complex value singles out base value by the method
 of residues. It is shown that the value result is adequate only when
 there is a harmonicity or correspondence by profit potencial between
 the base and building in which the base is exploited.
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Wu, Li, Ya Wu, Hongwei Jin, Liangren Zhang, Yujian He, and Xinjing Tang. "Photoswitching properties of hairpin ODNs with azobenzene derivatives at the loop position." MedChemComm 6, no. 3 (2015): 461–68. http://dx.doi.org/10.1039/c4md00378k.
Full textAbstract:
Photoisomerization of an azobenzene moiety modulates the thermodynamic stability of hairpin ODNs by interfering with stacking interation between azobenzene and neighbouring base pair and dihedral angle of the neighbouring base pair.
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Syafriana, Vilya, Sukma Nuswantara, Wibowo Mangunwardoyo, and Puspita Lisdiyanti. "Beta-Glucosidase 1 (bgl1) Gene Analysis in Mutant and Wild-type of Penicillium sp. ID10-T065." Jurnal Riset Biologi dan Aplikasinya 4, no. 1 (2022): 1–8. http://dx.doi.org/10.26740/jrba.v4n1.p1-8.
Full textAbstract:
In the previous study, Penicillium sp. ID10-T065 has been mutated using ultraviolet (UV), ethyl methyl sulfonate (EMS) and the combination of UV-EMS to increase Beta-glucosidase (bgl) activity. There were three mutants selected, UV13 (UV mutant), EM31 (EMS mutant), and UM23 (UV-EMS mutant). This study examined the mutations in the bgl gene encoding (bgl1) as well as sequence differences between mutants and wild-type of Penicillium sp. ID10-T065. The gene analysis was performed by PCR amplification and sequencing of the bgl1 gene. The results of bgl1 gene sequences (600 bp) from mutants were aligned with the wild-type, it was discovered that there were base alterations from position 2025 to 2050. Mutant UV13 showed the highest base alterations (7 bases) which occurred at position 2027 (T→C); 2036 (T→G); 2040 (T→G); 2047 (G→C); and 2048-2050 (TTG→GGA). Mutant EM31 showed alterations in five bases at positions 2034 (G→A), 2036 (T→G), 2037 (G→C), 2044 (G→C), and 2047 (G→T). Mutant UM23 showed two base alterations at position 2025 (T→A) and 2037 (G→C). UV irradiation and EMS mutation resulted in transition and transversion DNA, whereas the combination of UV-EMS mutation resulted in transversion mutations. Base alterations in UV13 and EM31 mutants, causing missense and silent mutation, while in UM23 mutant only silent mutations occur. The bgl1 gene analysis showed that mutation using UV light was more effective than using EMS or a combination of UV-EMS in Penicillium sp. ID10-T065.
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Wu, Si-Min, Ming Li, Jiang-Feng Xiang, Liang-Jie Yuan, and Ju-Tang Sun. "Ethylenediammonium thiophene-2,5-dicarboxylate dihydrate, an acid–base complex with a three-dimensional hydrogen-bonding system." Acta Crystallographica Section E Structure Reports Online 62, no. 7 (2006): o2951—o2952. http://dx.doi.org/10.1107/s1600536806022343.
Full textAbstract:
The crystal structure of the title compound, C2H10N2 2+·C6H2O4S2−·2H2O, is built of ethylenediammonium dications, occupying a special position on an inversion center, thiophene-2,5-dicarboxylate dianions, in a special position on the twofold axis, and water molecules in general positions. All residues are involved in an extensive hydrogen-bonding system, which links them into a three-dimensional supramolecular arrangement.
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Endo, Yoshio. "Variation in wh-expressions asking for a reason." Linguistic Variation 18, no. 2 (2018): 299–314. http://dx.doi.org/10.1075/lv.00024.end.
Full textAbstract:
Abstract In this paper, I will discuss some types of variation in wh-expressions asking for reasons such as why, what…for and how come with special attention to their base-generated positions in the framework of the cartography of syntactic structures. I will first discuss why and what…for to illustrate variation in the base-generated position of wh-expressions asking for reasons. I will next explore a new dimension in the cartography of syntactic structures by discussing some variation in the use of how come and the complementizer that among speakers.
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Friedemann, Marc-Ariel. "Inversion stylistique et position de base du sujet." Canadian Journal of Linguistics/Revue canadienne de linguistique 42, no. 4 (1997): 379–413. http://dx.doi.org/10.1017/s0008413100017151.
Full textAbstract:
AbstractThis article advances two main claims. First, it argues that [Spec, VP], the base position of the external argument, is right-branching in French. It is shown that some surprising restrictions imposed on the order of complements in stylistic inversion can then be interpreted in terms of an adjacency condition restricting the occurrence of lexical material between the postverbal subject and its Case checker. Second, it asserts that [Spec, IP], the derived subject position, is occupied by a null expletive, pro. The limited distribution of the construction then follows from the licensing conditions governing the null expletive in French. Further, the proposed analysis sketches a possible interpretation of adjacency phenomena and of the notion of expletives within recent developments of generative grammar.