Single Straight Line Research Articles

Discontinuous, biphasic, ontogenetic shifts in the metabolic allometry of aquatic animals?

Several investigations in recent years have reported patterns of discontinuous, biphasic, loglinear variation in the metabolic allometry of aquatic animals. These putative shifts in pattern of allometry have been attributed to changes in the primary site for gas exchange from cutaneous to branchial as animals undergo ontogenetic changes in size, shape, and surface area. Because of the important implications of the earlier research with regard to both physiology and evolution, I re-examined data that purportedly support claims of discontinuous, biphasic allometry in oxygen consumption versus body size of American eels (Anguilla rostrata) and spiny lobsters (Sagmariasus verreauxi). I used ANCOVA to fit three different statistical models to each set of logarithmic transformations and then assessed the fits by Akaike's Information Criterion. The observations for both species were described better by a single straight line fitted to the full distribution than by a biphasic model. Eels, lobsters, and other aquatic animals undergo changes in shape and surface area as they grow, but such changes are not necessarily accompanied by changes in the pattern of metabolic allometry.

Defect bulk-boundary correspondence of topological skyrmion phases of matter

Unpaired Majorana zero-modes are central to topological quantum computation schemes as building blocks of topological qubits, and are therefore under intense experimental and theoretical investigation. Their generalizations to parafermions and Fibonacci anyons are also of great interest, in particular for universal quantum computation schemes. In this work, we find a different generalization of Majorana zero-modes in effectively non-interacting systems, which are zero-energy bound states that exhibit a cross structure -- two straight, perpendicular lines in the complex plane -- composed of the complex number entries of the zero-mode wavefunction on a lattice, rather than a single straight line formed by complex number entries of the wavefunction on a lattice as in the case of an unpaired Majorana zero-mode. These cross zero-modes are realized for topological skyrmion phases under certain open boundary conditions when their characteristic momentum-space spin textures trap topological defects. They therefore serve as a second type of bulk-boundary correspondence for the topological skyrmion phases. In the process of characterizing this defect bulk-boundary correspondence, we develop recipes for constructing physically-relevant model Hamiltonians for topological skyrmion phases, efficient methods for computing the skyrmion number, and introduce three-dimensional topological skyrmion phases into the literature.

Reconfiguration of Hamiltonian Cycles in Rectangular Grid Graphs

We study reconfiguration of simple Hamiltonian cycles in a rectangular grid graph [Formula: see text], where the Hamiltonian cycle in each step of the reconfiguration connects every internal vertex of [Formula: see text] to a boundary vertex by a single straight line segment. We introduce two operations, flip and transpose, which are local to the grid. We show that any simple cycle of [Formula: see text] can be reconfigured to any other simple cycle of [Formula: see text] using [Formula: see text] flip and transpose operations. Our result proves that the simple Hamiltonian cycle graph [Formula: see text] is connected with respect to those two operations and has diameter [Formula: see text].

Commentary: Allometric analyses of data with outlying observations: The ontogenetic shift in metabolic allometry of American eels (Anguilla rostrata)

Authors of a recent report concluded that different patterns of metabolic allometry characterize juvenile and subadult stages in the life cycle of American eels (Anguilla rostrata). This conclusion was based on a comparison of straight lines fitted to logarithmic transformations of the original observations for metabolic rate and body mass, with the line fitted to transformations for 30 juveniles having a substantially lower slope than the line describing observations for 30 subadults. However, the authors failed to account for an influential outlier in the sample of juvenile eels, and this one outlier was determinative for the outcome of the analysis. When the outlier is removed from the combined data set for juveniles and subadults, the resulting sample of 59 observations is well described by a single straight line, which implies, in turn, that untransformed observations can be described by a two-parameter power equation with lognormal error. This supposition is confirmed by a graph of the two-parameter equation against the backdrop of the untransformed data. Thus, no change in the pattern of metabolic allometry occurs during the ontogeny of American eels: the same pattern of allometric variation characterizes both juvenile and subadult animals.

Reduced Nucleophilicities ИB of Lewis Bases B: Is ИB Independent of Whether B is Involved in a Hydrogen Bond or a Halogen Bond?

Reduced nucleophilicities ИB of axially symmetric molecules B were determined from , where De is the equilibrium dissociation energy of the complexes B⋅⋅⋅XY, NB is the nucleophilicity of B, EXY is the electrophilicity of the halogen-bond donor XY and is the minimum electrostatic surface potential of B. The series B⋅⋅⋅ClY, B⋅⋅⋅BrY, B⋅⋅⋅IY (Y=F, Cl, Br, I, CN, and CCH) as well as (B⋅⋅⋅XY, XY=F2 , Cl2 , Br2 ,and BrCl) of complexes were investigated. Molecules B were grouped so that the terminal atom involved in the halogen bond was fixed within the group. Groups having N as the terminal atom were RCN (R=CH3 , H, and F) or RN (R=N and P), those with C as the terminal atom were RNC (R=H and F) and RC (R=O, S and Se), and those with a terminal O atom were R=C=O (R=O or S). Graphs of versus EXY for each group were straight lines through the origin, with generally different gradients, hence implying different NB . By contrast, when was the ordinate the lines conflated to give a single straight line, which then defines a common (reduced) nucleophilicity ИB for that group of B. Hence it was concluded that ИB is an intrinsic property of the terminal atom, independent of the remainder of B, and only weakly dependent on the type (C, N or O) of the terminal atom. Moreover, ИB for each B was the same as determined previously from the hydrogen-bonded series B⋅⋅⋅HX, (X=F, Cl, Br, I, CN, CCH, and CP).

Expansion of beam width in exposure and crystal structure beamline (BL09) of SAGA-LS and applications using expanded beams

In this study, for high-efficiency experiments of deep X-ray lithography, radiation mutation breeding, and X-ray topography, we expanded the beam width in the exposure and crystal structure beamline (BL09) using a synchrotron beam at the SAGA Light Source facility. BL09 was divided into a straight A-line for hard X-rays and a branch B-line for soft X-rays; however, we reconstructed the new BL09 as a single straight-line by unifying the A and B-lines. Vacuum components, such as a large beam shutter, large beryllium window, acoustic delay line, and monochromator chamber were newly located in the reconstructed BL09. A white (or monochromatic) beam can be switched by removing (or inserting) the monochromator into the beam path as needed. After the reconstruction, the widths of the white and monochromatic beams at the terminal of BL09 were expanded from 110 to 395 mm and from 70 to 128 mm, respectively. The expanded white beam has the width of the world-class in synchrotron radiation facilities. Furthermore, we demonstrated the effect of the expanded beams and improvement in the experimental efficiency through deep X-ray lithography, radiation mutation breeding, and X-ray topography. The use of expanded beams is also expected to lead to the fabrication of practicable fine-structures and provide a deeper understanding of defect structures.

Employing a statistical framework to constrain orientation measurement inaccuracies from digital outcrop models: Insights from sandstone intrusions

In this study, we examine the errors and uncertainties associated with orientation measurements collected from digital outcrop models using the geometrical property, collinearity. Collinearity is expressed as the characteristics of a set of points lying on a single straight line, and is beneficial because a trace far from collinear is required for obtaining accurate orientation measurements of planar geological bodies from digital outcrop models. We, thus, demonstrate this relationship, as well as assess the impact any associated errors have on orientation distribution forms using orientation measurement traces collected from sandstone intrusions with a digital outcrop model of the Panoche Giant Injection Complex acquired through light detection and ranging and photogrammetry techniques.Our experiments highlight how in addition to sampling bias and sample size, unreliable orientation estimates can negatively affect interpretation. We show that the distribution of orientation for a network of geological structures (e.g., fractures, sandstone intrusions) in a particular region can be altered with the inclusion of erroneous measurements. From our case study, it was noted that the high proportion of unreliable orientation measurements obtained when using a digital outcrop model of the study area resulted in inconsistencies in the structural analysis that could have been attributed to other factors. Thus, without putting into consideration the reliability of the samples, a sampling issue will still be faced, regardless of using the appropriate sample size and technique.

Volumetric and viscosity data of selected oils analyzed in the density scaling regime

In this paper, we have performed thorough analyses of volumetric and viscosity data for six oils. The volumetric data has been inspected by using two different equations of state, drawing a special attention to the intersection of the isothermal pressure dependences of the thermal volume expansivity, which were earlier reported for various materials in the liquid state. Each fluid is unique with respect to the other oils’ relative composition, with those being either a pure liquid (Sebacate), or mineral oil with a proprietary blend of branched paraffins, napthalenes and aromatic molecules (Normafluid) or are undisclosed composition of mineral oil (MIN-H01 and MIN-H02) or are composed of fatty acid methyl esters (soybean biodiesel and rapeseed biodiesel). We have confirmed that the intersection points evaluated for different isotherms constitute a nonlinear curve for a given tested oil, and not any single point or straight line. Consequently, we have determined the temperature–pressure areas important from the application viewpoint, within which the thermal volume expansivity behaves differently, either increasing or decreasing with increasing temperature at a constant pressure. In the viscosity analysis, the parametrizations of the temperature–pressure dependences of specific volume based on the equations of state enabled to employ the density scaling idea in its simplest form of a power law of densityγ/temperature, where γ related to an effective intermolecular potential is independent of thermodynamic conditions to a good approximation, which was successfully validated by various materials mainly in the supercooled liquid state, but also in the normal liquid and liquid crystal states in some cases. We have found that the scaling law giving prediction benefits relied on a linkage between macroscopic measurement quantities and effective molecular interactions is obeyed by the viscosity data of examined oils. Then, based on the prediction capabilities of the density scaling criterion, we have successfully explored the inflection points observed in some isothermal pressure dependences of viscosity measured for the oils in the temperature–pressure ranges that differ from those earlier reported for other materials. This intriguing finding observed in case of the experimental data for only some examined oils yields not only cognitive benefits, but it is also expected to exert an effect for instance on mechanical properties of the materials. Thus, our comparative discussion about the intersection and inflection curves provide a useful contribution to the further investigations of these thermodynamic and dynamic issues and other physicochemical properties of oils, which require gaining a better insight.

Three Crossing Limit Cycles in a 3D-Filippov System Having a T-Singularity

Our starting point is a discontinuous piecewise linear dynamical system in [Formula: see text] with two zones that present a single invisible two-fold straight line and invariant cylinders. We broke the dynamics of this vector field to obtain a new four-parameter piecewise linear vector field with a [Formula: see text]-singularity. For this vector field, we prove that the upper bound of simple crossing limit cycles (simple CLCs) is three, and provide conditions for the existence of 1, 2, or 3 simple CLCs. We also show the occurrence of three distinct bifurcations involving such simple CLCs that are derived from a bifurcation set with two parameters: (i) a Teixeira Singularity bifurcation (TS-bifurcation); (ii) a Fold bifurcation; and (iii) a Cusp bifurcation.

Scaling law for Rashba-type spin splitting in quantum-well films

We use laser-based spin- and angle-resolved photoemission spectroscopy (laser-SARPES) with high resolution and experimentally determine, for the first time, the Rashba parameters of quantum-well states (QWSs) systematically changing with the film thickness and the quantum numbers, through the observation of the Ag films grown on an Au(111) substrate. The data are very well reproduced by the theoretical calculations based on the density functional theory. Most importantly, we find a scaling law for the Rashba parameter (${\ensuremath{\alpha}}_{\mathrm{R}}$) that the magnitude of ${\ensuremath{\alpha}}_{\mathrm{R}}$ is scaled by the charge density at the interface and the spin-orbit coupling ratio between the film and the substrate, and it is expressed by a single straight line regardless of the film thickness and the quantum numbers. The new finding not only is crucial to understand the Rashba effect in QWSs but also gives a foundation of film growth engineering to fine-tune the spin splitting in 2D heterostructure systems.

Effects of the maximum Li stoichiometry in electrode on peak current densities of cyclic voltammogram

Cyclic voltammetry (CV) is widely used to study Li ion batteries. Most explanations of CV experiments, however, are based on traditional electrochemical kinetic models of all reactive species in electrolytes, possibly leading to non-physical lithium accumulation on electrode surfaces due to several orders of difference in magnitude between Li+ diffusion coefficients in electrode and electrolyte. Here, by considering size-effects of electrodes, we show that analytic expressions of the peak current density Ip of CV can be derived by combining Nernst diffusion layer model with conservation law of matter, leaving the coefficients of the analytic expressions undetermined. We then develop a complex model by considering the maximum stoichiometric intercalation sites (MSIS) of Li+ in electrode and name it as the MSIS model. Numerical simulations of the MSIS model on three shapes of electrodes confirm the validity of the analytic expressions, and the coefficients in the analytic expressions are determined from simulations. The plots of log(Ip) versus log(v) with v the scan rate show split lines, each of which can be further divided into low and high scan rate regions with two distinguished slopes, while the plots are always a single straight line in the MSIS-free model without the consideration of MSIS. The MSIS model and the present analytic and simulation results may provide a tool to characterize the MSIS effect and the Li+ diffusion coefficient in an electrode in experiments.

A Theoretical Method for Evaluating the Lubrication Performance of the Meshing Pair Profiles in Water Flooded Single Screw Compressors Based on the Micro Deflecting Motion Trajectory

To improve the life of the meshing pair in single screw compressor (SSC), several meshing pair profiles (MPP) were proposed for raising the lubrication properties. Therefore, it is necessary to evaluate the lubrication performance of the MPPs. In this paper, an evaluation method based on micro deflecting motion trajectory (MDMT) is proposed and the theoretical model to realize MDMT is established. The model mainly contains a geometric model, a thermodynamics model, a hydrodynamic lubrication model and corresponding algorithm. With the presented method, three kinds of MPP including single straight line type (SSLT), single column type (SCT) and multi column type (MCT) have been analyzed. Obtained results show that compared to the SSLT and SCT, the MCT generates the greatest peak value of the water film pressure. The total torque applied on the gate-rotor generated by the water films decreases with the increment of the discharge pressure and increases with the machine size. The water film stiffness firstly decreases and then increases with the micro deflecting angle increasing. The water film stiffness at trailing side is always larger than that at leading side. As the discharge pressure increases, the MDMT curves approach the leading flank, and the lubrication properties get worse. With the machine size increasing, the MDMT curves move towards the trailing side and the lubrication performance is improved. Comparing to the other two MPPs, the MCT can achieve floating mesh without contact in relatively larger machines and comparably lower discharge pressure.

The temperature of maximum density for amino acid aqueous solutions. An experimental and molecular dynamics study

The temperature of maximum density (TMD) for aqueous solutions of seven amino acids has been experimentally determined by means of density measurements versus temperature. The selected amino acids have been arginine, cysteine, glutamic acid, glutamine, lysine, methionine, and threonine. The TMD dependence against composition has been obtained from the experimental data and characterized through the Despretz constant. All amino acids induce a depression in the TMD as compared with that of pure water. If the mole fraction is selected as composition variable, a clear dependence against amino acid molar mass is observed, which disappears when TMDs are represented versus mass fraction; almost all data shrink onto a single straight line. It must be pointed out that the TMD depressions for all studied amino acids are quite larger than those previously observed for proteins. This suggests that TMDs for proteins cannot be explained as a simple, additive result of its constituents, and, therefore complex cooperative phenomena seem to take place. The partial molar volume at infinite dilution has been obtained from density data, and a consistency test between its temperature dependence and that of temperature of maximum density versus composition has been performed, obtaining satisfactory results. A molecular dynamics study for all the studied systems has been also carried out. Amino acids have been modeled through the OPLS-AA force field, whereas the TIP4P/2005 model was used for water. The temperature of maximum density and partial molar volume have been calculated from the simulated density, and the results are compared with experimental data. Although the agreement is only fair, similar qualitative trends were obtained. The simulated Despretz constants are smaller than the experimental ones, a result that was already previously observed for methanol aqueous solutions. A structural analysis of water molecules in solution along the MD trajectories showed no enhancement of ice-like structures in complete agreement with the TMD decrease with concentration.

Computational Study of the Source-Area Effect for Bubble Plumes in Stratified Environments

In this work, a large-eddy simulation of bubble plumes in linearly stratified environments is presented. The gas bubbles are treated as Lagrangian particles. The intrusion and peeling are clearly manifested in the computed flow fields. The results of about 50 simulations with different parameters reveal the importance of bubble source area for plumes on the laboratory scale. A new type of bubble plume with rapid and distinct peelings is observed which is favored by large source areas. With a proper normalization, the present data points collapse onto a single straight line after applying a virtual-source correction which reflects the source-area effect. These results provide a plausible explanation for the scatter of the previous experimental and computational data in literature. A simple relation between the trap height and the peel height is observed and its mechanism is discussed.

Carbon isotopic evolution of aqueous fluids in CM chondrites: Clues from in-situ isotope analyses within calcite grains in Yamato-791198

We report the variability in carbon and oxygen isotopic compositions, chemical compositions, and cathodoluminescence intensities within calcite grains in the Yamato-791198 CM chondrite measured by secondary ion mass spectrometry. To understand the change in carbon isotopic compositions during calcite formation, the carbon isotope-analyses were performed on a series of crystal growth bands of each calcite grain. The crystal growth of calcite grains was inferred from comprehensive analyses of oxygen isotopes, chemical compositions, and cathodoluminescence characteristics.The observed δ18O variations within individual grains are as large as 13‰. The oxygen-isotope data plot on a single straight line with a slope of 0.61 ± 0.06 (2σ) in an oxygen three-isotope diagram. This slope steeper than that of the terrestrial fractionation line indicates that the oxygen isotopic compositions of aqueous fluids evolved from higher δ18O and Δ17O to lower δ18O and Δ17O compositions due to the oxygen-isotope exchange between water and anhydrous silicates in the parent body. Thus, calcite crystals grew from higher Δ17O to lower Δ17O areas. The crystal growth inferred from oxygen isotopic compositions is corroborated by the morphology and cathodoluminescence characteristics of the calcite grains. The minor element concentrations of the calcite grains did not increase/decrease monotonically during calcite formation.The δ13C variations within individual grains are no more than 4‰ except for one grain. The intra-grain δ13C variations observed here are much smaller than inter-grain δ13C variations of ∼80‰ previously reported. These observations indicate that the carbon isotopic compositions of dissolved carbon species did not change during calcite formation and that they were locally heterogeneous which reflects variable proportions of carbon reservoirs with different isotopic compositions.

A review on mixed assembly line balancing, sequencing and scheduling in an industry

Assembly line in a production unit is a line of workers and machines. In a manufacturing unit the production of components are done on assembly line. The product moves along this line while it is being processed. The assembly lines changed with time from single models straight lines to the mixed, multi -model lines in a flexible manufacturing system and also lines with parallel work stations, U-shaped lines. The main objective of assembly line design for a system is balancing the assembly line according to the desired production volume per shift and minimizing the number of workstations. In this paper, different assembly line balancing problems (ALBP) have been reviewed and discussed. For solving the assembly line balancing and sequencing problems, the development of mathematical model may be quite helpful for the researchers.

A Single Injection Straight Line Approach to Anesthetize Inferior Alveolar Nerve, Long Buccal Nerve and Lingual Nerve: A New Technique

Pain management is central to the success of any dental procedure. Many patients choose their dentist based on perceived ability of the dentist to deliver painless dentistry. Inferior alveolar nerve block is the most commonly employed nerve block in mandibular region. Although several techniques for inferior alveolar nerve block have been advocated by various authors, effective anesthesia of the inferior alveolar nerve on a consistent basis is never an easy task particularly for inexperienced dentists. The difficulty usually LIES in the accurate localization of anatomical landmarks particularly the pterygomandibular raphe. It is also a known fact that mandibular anesthetic techniques present a lower success rate when compared to maxillary anaesthetic techniques due to greater density of the mandibular alveolar bone, limited access to the inferior alveolar nerve, marked anatomical variations, and need for deeper needle penetration into the soft tissue. Unfortunately, this nerve block has a comparatively high failure rate. In this article, we present a modification of the conventional inferior alveolar nerve block technique which is simple, easy to master, has high success rate and comfortable to patients as multiple needle penetrations are avoided. In the standard technique, following anesthesia of inferior alveolar nerve, the needle is redirected for lingual nerve anesthesia leading to potential complications which is avoided in single injection straight line technique. A clinical study of alternative inferior alveolar nerve block along with long buccal and lingual nerve blocks, by injecting local anesthesia into the pterygomandibular space by single penetration without redirecting the needle was performed on two hundred and seven patients undergoing simple extractions and surgical extractions of mandibular molars. A success rate of 97.5% was obtained

Dual substrate/solvent- roles of water and mixed reaction-diffusion control of β-Galactosidase catalyzed reactions in PEG-induced macromolecular crowding conditions

Here we studied the effect of molecular crowding on the hydrolysis of ortho- and para-nitrophenyl-β-D-galactopyranosides (ONPG, PNPG) catalysed by Escherichia coli β-Galactosidase in the presence of 0–35%w/v 6kD polyethyleneglycol (PEG6000). The Eadie-Hofstee data analysis exhibited single straight lines for PNPG at all [PEG6000] as well as for ONPG in the absence of PEG6000 so a Michaelian model was applied to calculate the kinetic parameters KM and kcat (catalytic rate constant) values. However, for ONPG hydrolysis in the presence of PEG6000, the two slopes visualized in Eadie-Hofstee plots leaded to apply a biphasic kinetic model to fit initial rate vs. [ONPG] plots hence calculating two apparent KM and two kcat values. Since the rate limiting-step of the enzymatic hydrolysis mechanism of ONPG, but not of PNPG, is the water-dependent one, the existence of several molecular water populations differing in their energy and/or their availability as reactants may explain the biphasic kinetics in the presence of PEG6000. With PNPG, KM as well as kcat varied with [PEG6000] like a parabola opening upward with a minimum at 15 %w/v [PEG6000]. In the case of ONPG, one of the components became constant while the other component exhibited a slight increasing tendency in kcat plus high and [PEG6000]-dependent increasing KM values. Sedimentation velocity analysis demonstrated that PEG6000 impaired the diffusion of β-Gal but not that of substrates. In conjunction, kinetic data reflected complex combinations of PEG6000-induced effects on enzyme structure, water structure, thermodynamic activities of all the chemical species participating in the reaction and protein diffusion.

AN IDEOLOGICAL PRINCIPLE FORMING THE MARKET LOGISTICS THEORY

Topicality. In the conditions of a developed market economy and the deepening of the specialization of business entities, the theory of logistics is more oriented towards enterprises, and not to markets, and needs some market reorientation. Under the pressure of market processes, scientists are trying to generalize the market logistics processes of goods through the introduction of such concepts as: "logistics system", transport, marketing logistics. Further analysis of the theory of logistics requires attention to the main element of the market - the product, given that all economic actors in a market economy operate in a market environment, that is within the relevant commodity markets. That is, any business entity belongs to a certain commodity market ie it operates within a defined commodity market. Note that the product is precisely the element that determines the market - the commodity market. Consequently, the realization of the functions of the commodity movement combines the respective economic entities among themselves into the logistic chain of the commodity market. The logistic chain is a clearly defined route of a commodity wheel with logistic transitions, in which there are changes in the nature of the flow of goods, as well as changes in ownership. Aim and tasks. The purpose of this article is to develop approaches to the formation of the theory of market logistics on the reproductive principle. Research results. Development of proposals for the formation of the theory of market logistics on the reproductive principle. The definition of the category "market logistics" is given, the principles on which effective logistic chains of commodity markets should be organized and their reproductive processes must be formed. Conclusions. Construction of an effective reproduction market logistics is also provided by the minimum costs associated with the flow of material flow from the supplier to the consumer at the minimum possible date. However, the real process of movement of goods in the market is associated with the appearance on its way of some obstacles (barriers), or points of logistical gaps, which, on the one hand, leads to increased opium and increased costs for overcoming it, and on the other hand, to forced warehousing (delay) when there is a lack of bandwidth of the market chain links. Therefore, the task of the next research of market logistics is to determine ways to overcome these obstacles or gap, which impair the ideal conditions for the movement of material flows, channels of commodity movement as a deviation from a single straight line.

Dielectric and impedance properties of three dimension graphene oxide-carbon nanotube acrylonitrile butadiene styrene hybrid composites

In this work, comparison of dielectric and impedance studies of multi-walled carbon nanotube (MWCNTs), graphene oxide-carbon nanotube (GCNTs) reinforced acrylonitrile–butadiene–styrene (ABS) composites prepared by twin-screw extruder with back flow channel have been carried out. The dielectric relaxation and impedance behavior of these polymer composites have been studied with varying wt. % of MWCNTs and GCNTs reinforced ABS matrix in the frequency range of 102–106 Hz. The results showed that the real part of the impedance of the composites with MWCNTs content of 7 wt % or higher exhibits frequency independent behavior at the low-frequency region, and GCNTs-ABS demonstrates frequency dependent. Also, the relaxation time decreases with increase in wt. % of carbon nanofillers due to the formation of an interconnecting path within the polymer matrix. The Nyquist plots for MWCNTs-ABS composites showed the appearance of a single semicircular arc, whose radius of curvature decreases with increase in MWCNTs loading, suggest the decrease in overall impedance of the composite with high amount of filler loading. The radius of arc in impedance spectra decreases with increasing the percentage of fillers indicating the occurence of conducting behavior. In GCNTs-ABS composites Nyquist plots showed the appearance of a single straight line. The dielectric responses of MWCNTs, GCNTs reinforced ABS composites were investigated. The dielectric constant of MWCNTs-ABS composites gets enhanced significantly with addition 0 to 3 wt % MWCNTs. Room temperature AC conductivity increased with increase in the wt. % of MWCNTs and GCNTs from 10−12 S/cm for the unfilled polymer to 10−5 S/cm for 10 wt % of MWCNTs-ABS and 10−7 S/cm for 10 wt % of GCNTs-ABS composites. The decrease in impedance and enhancement of dielectric properties were due to the interfacial polarization between MWCNTs and ABS. Improved conductivity of MWCNTs-ABS and GCNTs-ABS composites may be useful in electromagnetic interference (EMI) shielding and antistatic materials.