cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Bold and the Beautiful: Portraiture in Pakistani Truck Art
Creators: name: Ali, Farah
Publisher: name: Georgia State University
Year: 2021

description: The evolution of portraiture in Pakistani truck painting is indicative of strong global influences and local folk elements coming together. Without much patronage or formal vocational guidance, truck painters have inadvertently created a contemporary pop culture phenomenon internationally recognized today as distinctly Pakistani. Truck art and its artists' role in carving out a national identity for Pakistan is a postmodernist continuation of cultural legacies. I argue that truck art has now transcended into a “glocal” entity, more in terms of subject matter than stylistic representation, mainly due to the relentless underappreciated efforts of its artists and that this fusion of the local and the global is most obvious in the burgeoning of truck portraiture.
Menudo and Lucky Charms
Creators: name: Castro, Felicia
Publisher: name: Georgia State University
Year: 2022

description: Menudo and Lucky Charms is an exhibition of videos and paintings that explores assimilation and identity within Mexican and American cultures. This body of work is rooted in my experiences growing up in a Mexican household within a predominantly white community. I have been assimilated to American culture, a fact that becomes clear when I am among people of Mexican heritage, my heritage. Menudo and Lucky Charms is an investigation and reclamation of self.  Throughout the exhibition, I seek out moments of connection and contradiction between my family history and the evolution of my identity.
a wheel inside a wheel
Creators: name: Storm, Elizabeth
Publisher: name: Georgia State University
Year: 2022

description: Getting lost in nature, I can sense the unfixity of its countless forms and processes. Recurring patterns at micro and macro scale arise from creative and destructive forces in space and time; reality appears simultaneously constant and impermanent. My thesis work, a wheel inside a wheel, explores the self in relation to contemporary conceptions of reality. I look at static and dynamic representations of stripped-down patterns modeled from nature, like circular bursts, splintering branches, or the meander of a wave. The action-based works on paper and cloth leverage invisible forces and signal permanency and physical embodiment, deepened through an engagement with archetypal materials. Time-based media renders an altogether separate point of view. Presenting documentary footage alongside artifacts of this abstraction practice, I speculate on the role sensing and recording technologies have in altering perceptions and observations of reality.
รายงานไดโนเสาร์ในช่วงระหว่างยุคไทรแอสสิก-ยุคจูแรสสิกของประเทศไทย
Creators: name: ชลิดา เหล่าจุมพล
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ช่วงระหว่างยุคไทรแอสสิก-ยุคจูแรสสิก, ไดโนเสาร์, รายงาน

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Do you remember the sun...?
Creators: name: Dodd, Travis
Publisher: name: Georgia State University
Year: 2022

description: Do you remember the sun…? is an interdisciplinary installation that explores gold’s function as a utilitarian material within technology.  Once reserved for the Gods, gold can now be found within the circuitry of cutting-edge space exploration technology or plated against the surface of mundane consumer electronics. Gold’s utilitarian shift away from adornment and capital began in the 1970s when digital technology first entered the home. First-generation personal computers and video game systems, both latent with gold, allowed access to new interactive virtual worlds that would evolve into technologies that currently dominate culture and society.   The imagery of Do You Remember the Sun…? documents gold’s fall from grace by showcasing the extraction and refinement of gold from this first wave of interactive digital technology.
Generating the Goeritz group of $S^3$
Creators: name: Scharlemann, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57K35, 57M50, 57M60

description: In 1980 J. Powell \cite{Po} proposed that five specific elements sufficed to generate the Goeritz group for any genus Heegaard splitting of the 3-sphere. Here we prove that a natural expansion of Powell's proposed generators, to include all eyeglass twists and all topological conjugates of Powell's generators does suffice.
description: v.4 contains minor clarifications throughout. To appear in Journal of the Association for Mathematical Research
Sky Garden Graduate Student Housing
Creators: name: Saavedra Rios, Maria Paula
Publisher: name: Georgia State University
Year: 2022

description: This thesis presents an on-campus graduate student housing project that aims to revitalize its Downtown Atlanta neighborhood, contribute to Georgia State University’s academic goals and campus development plans, and address aspects of the housing problem that GSU’s graduate students currently face in Atlanta, Georgia. The literature review and data collected from the graduate student survey informed the design process by understanding the urban context history and identifying graduate students’ needs and preferences. The project aims to reposition a vacant office building located on-campus and convert it into student housing serving an age-diverse population offering common areas that contribute to students’ academic and social life and restaurants/coffee shops to help generate a sense of neighborhood community.  The “city in the woods” concept inspired expanded interventions with natural vegetation and greenery, a natural and neutral interior color palette, and literal open-air punctuations through the building.
อัตราความชุกของการติดเชื้อหนอนพยาธิในทางเดินอาหารหนู (Murid) ในจังหวัดศรีสะเกษ และอุบลราชธานี
Creators: name: ญาณิศา นราพงษ์
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: อัตราความชุก, หนอนพยาธิ, หนู, จังหวัดศรีสะเกษ, อุบลราชธานี

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Dynamical generation of solitons in one-dimensional Fermi superfluids with and without spin-orbit coupling
Creators: name: Kong, Lingchii
name: Fan, Genwang
name: Peng, Shi-Guo
name: Chen, Xiao-Long
name: Zhao, Huaisong
name: Zou, Peng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We theoretically generalize a systematic language to describe the phase-imprinting technique to investigate the dynamical generation of solitons in a one-dimensional Raman-type spin-orbit-coupled Fermi superfluid. We check our method with the simulation of time-dependent Bogoliubov-de Gennes equations and find that our method not only can generate stable dark and even gray solitons in a conventional Fermi superfluid by controlling the transferred phase jump but also is feasible to create a stable dark soliton in both BCS and topological states of a spin-orbit-coupled Fermi superfluid. We also discuss the physical implication of our method.
description: 10 pages, 12 figures
Wax and Mortality: A Transhistorical Study on Wax in Artistic Depictions of Death
Creators: name: Kirkpatrick, Mary
Publisher: name: Georgia State University
Year: 2022

description: This essay is an exploration of the medium of beeswax throughout Western art history from antiquity to the Baroque period that explores how it has consistently been used to illustrate death, decay, and violence. Examples range from funerary effigies to magical poppets to anatomical models, each displaying how the substance of wax is inherently tied to corporeality and mortality. Each example is chosen to demonstrate how either the visual appearance or the tactile properties of wax influence its use in corporeal sculpture, culminating in the work of Gaetano Giulio Zumbo to illustrate a union of the two.
Unseen
Creators: name: Grabert, Bethany
Publisher: name: Georgia State University
Year: 2022

description: Unseen is a collection of figurative sculptures that explore the multitude of physical reactions and emotional repercussions of a body living in pain. I draw my inspiration from my own chronic disease, endometriosis, and from all the people who are stigmatized for living with invisible chronic pain conditions. My work shows the invisible interior experience of extreme pain that can isolate a person from the world and leave them feeling disconnected from their own body. I am representing the everyday moments that result from the body undergoing pain or stress by exaggerating and distorting the body’s exterior, using it to communicate the interior feelings of agony, exhaustion, depression, anger, weight, fragility and disconnection caused by an invisible disease. These assemblages render visible the typically unseen physical and emotional toll taken by chronic pain and trauma.
The Persistent Homology of Dual Digital Image Constructions
Creators: name: Bleile, Bea
name: Garin, Adélie
name: Heiss, Teresa
name: Maggs, Kelly
name: Robins, Vanessa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: To compute the persistent homology of a grayscale digital image one needs to build a simplicial or cubical complex from it. For cubical complexes, the two commonly used constructions (corresponding to direct and indirect digital adjacencies) can give different results for the same image. The two constructions are almost dual to each other, and we use this relationship to extend and modify the cubical complexes to become dual filtered cell complexes. We derive a general relationship between the persistent homology of two dual filtered cell complexes, and also establish how various modifications to a filtered complex change the persistence diagram. Applying these results to images, we derive a method to transform the persistence diagram computed using one type of cubical complex into a persistence diagram for the other construction. This means software for computing persistent homology from images can now be easily adapted to produce results for either of the two cubical complex constructions without additional low-level code implementation.
Anomalies in (2+1)D fermionic topological phases and (3+1)D path integral state sums for fermionic SPTs
Creators: name: Tata, Sri
name: Kobayashi, Ryohei
name: Bulmash, Daniel
name: Barkeshli, Maissam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Given a (2+1)D fermionic topological order and a symmetry fractionalization class for a global symmetry group $G$, we show how to construct a (3+1)D topologically invariant path integral for a fermionic $G$ symmetry-protected topological state ($G$-FSPT) in terms of an exact combinatorial state sum. This provides a general way to compute anomalies in (2+1)D fermionic symmetry-enriched topological states of matter. Equivalently, our construction provides an exact (3+1)D combinatorial state sum for a path integral of any FSPT that admits a symmetry-preserving gapped boundary, including the (3+1)D topological insulators and superconductors in class AII, AIII, DIII, and CII that arise in the free fermion classification. Our construction uses the fermionic topological order (characterized by a super-modular tensor category) and symmetry fractionalization data to define a (3+1)D path integral for a bosonic theory that hosts a non-trivial emergent fermionic particle, and then condenses the fermion by summing over closed 3-form $\mathbb{Z}_2$ background gauge fields. This procedure involves a number of non-trivial higher-form anomalies associated with Fermi statistics and fractional quantum numbers that need to be appropriately canceled off with a Grassmann integral that depends on a generalized spin structure. We show how our construction reproduces the $\mathbb{Z}_{16}$ anomaly indicator for time-reversal symmetric topological superconductors with ${\bf T}^2 = (-1)^F$. Mathematically, with standard technical assumptions, this implies that our construction gives a combinatorial state sum on a triangulated 4-manifold that can distinguish all $\mathbb{Z}_{16}$ $\mathrm{Pin}^+$ smooth bordism classes. As such, it contains the topological information encoded in the eta invariant of the pin$^+$ Dirac operator, thus giving an example of a state sum TQFT that can distinguish exotic smooth structure.
description: 44+68 pages, 11+51 figures. v2: updated references, added Appendix F
Artifacts of Industry
Creators: name: Robertson, James
Publisher: name: Georgia State University
Year: 2022

description: Artifacts of Industry positions industrial plastic waste as an Anthropocene artifact that records humanity’s impact on the environment. My multimedia sculptures begin with casts of factory scraps—evidence of processes that occurred in other places and time periods. Working with the forms of these industrial remnants, I contemplate their pasts and their histories, and I imagine the experiences that imbue and shape each object. In transforming these artifacts, I aid their transition, rebirthing them into a new phase of existence.
ฤทธิ์ลดระดับนํ้าตาลและไขมันในเลือดของสารสกัดดอกกระดุมทองเลื้อย
Creators: name: กนกวรรณ กลางคาร
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: หนูเบาหวาน, ฤทธิ์ต้านอนุมูลอิสระ, ฤทธิ์ลดระดับนํ้าตาล, ฤทธิ์ลดระดับไขมัน, ดอกกระดุมทองเลื้อย

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
องค์ประกอบทางเคมีและความเป็นพิษของสารสกัดดอกกระดุมทองเลื้อยในหนูขาว
Creators: name: สุรศักดิ์ ณ อุบล
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: สารสกัดดอกกระดุมทองเลื้อย, องค์ประกอบทางเคมี, พิษเฉียบพลัน, พิษกึ่งเฉียบพลัน, พิษกึ่งเรื้อรัง

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Choose Your Own Adventure!
Creators: name: Gum, Jordan
Publisher: name: Georgia State University
Year: 2022

description: Choose Your Own Adventure! is a concoctive reaction to burnout. Born of frustration, existential crises, and career exhaustion, this project pursues an understanding of where the roots of burnout take hold, in the context of the life and journey of the creative professional. From that base of knowledge, the work seeks to subvert the binding effects of burnout through an amalgam of the experiential and the tactile. Part design experiment, part performance art, part spontaneous conversation therapy, Choose Your Own Adventure! is comprised of evolving collaborative design exercises, as well as a reflective conversation space within the gallery. The goal is not to cure burnout, but rather to serve as a potential respite from the internal and external pressures that weigh on those who pursue a career as a professional creative.
ผลของสารสกัดจากมะก่องข้าว (Abutilon indicum (L.) Sweet ต่ออวัยวะสืบพันธุ์และวงจร การเป็นสัดของหนูเพศเมีย
Creators: name: นริศรา นนทภา
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: มะก่องข้าว, รังไข่, วงจรการเป็นสัด

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
พิษเฉียบพลันและพิษกึ่งเฉียบพลันของผงคีเฟอร์จากนํ้านมข้าวกล้องขาวดอกมะลิ 105
Creators: name: สุภาพร ชื่นชม
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ข้าวขาวดอกมะลิ 105, ผงคีเฟอร์, พิษเฉียบพลัน, พิษกึ่งเฉียบพลัน

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Personal Perceptions
Creators: name: Holloway, Charnelle
Publisher: name: Georgia State University
Year: 1986

description: Every artist should be a craftsman. Every craftsman should be an artist. For some reason, a line has been drawn. The invisible line between art and craft is a dangerous and unnecessary barrier. It is detrimental to the art field as a whole. It separates all visual artists, when there shouldn't be a separation. It encourages artists, some with great vision, to become lax in the use of their tools. It encourages adept craftsmen to compromise creativity for the sake of function. It has lessened the credibility of and respect for artists in the eyes of a public that used to admire and revere this field. Thoughts and questions that I've had in the past few years have culminated into this thesis. I will show my personal perceptions and conclusions of what my art should be, according to what I've learned. And I will also explain my efforts to reach back in time and recapture an era when art and craft were one.
Exploring Diffusion Characteristics that Influence Serious Games Adoption Decisions
Creators: name: Antonopoulou, Katerina
name: Dacre, Nicholas
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: In this paper we discuss the diffusion of serious games and present reasons for why Rogers traditional approach is limited in this context. We present an alternative overview through the characteristics of relative advantage, compatibility, complexity, trialability, and observability, that reflect on the adoption decision and contributes on the commercialization of serious games.
description: Citation: Antonopoulou, K., & Dacre, N. (2015). Exploring Diffusion Characteristics that Influence Serious Games Adoption Decisions. Innovation in Information Infrastructures, Coventry, UK. https://dx.doi.org/10.2139/ssrn.3829185
ผลของสารสกัดจากใบคนทีสอ (Vitex trifolia L.) ต่อระบบสืบพันธุ์ในหนูแรทตัดรังไข่
Creators: name: วันประเสริฐ ทุมพะลา
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: สารสกัดใบคนทีสอ, สารฟีโนลิครวม, สารประกอบฟลาโวนอยด์, ระบบสืบพันธุ์, หนูแรทตัดรังไข่

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
The Seven Valleys
Creators: name: Mojtahedzadeh Fard, Darya
Publisher: name: Georgia State University
Year: 2022

description: Starting from my roots in Persian traditions, I am branching out, seeking my place in the universe, and looking for enlightenment among other belief systems. I draw inspiration from Persian poets and scholars like Rumi that form the basis of my research – and the Sufi mystic Attar in particular. Attar wrote about the steps one must complete to attain enlightenment in his tale The Conference of the Birds. In this tale, a group of birds must survive through seven challenges, or valleys, to reach spiritual perfection. The Seven Valleys combines seven screen-printed Plexiglass panels with projected video, sound, and shadow to explore spirituality. This immersive, multilayered installation is an investigation of the phenomenology of flow, unity, and transcendence and how humans can experience ecstasy in connection with the natural world.
ฤทธิ์ต้านอนุมูลอิสระของรากและใบย่านาง (Tiliacora triandra Diels.)
Creators: name: ธีรพร กทิศาสตร์
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ย่านาง, ฤทธิ์ต้านอนุมูลอิสระ

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Nonlinear Hall response in the driving dynamics of ultracold atoms in optical lattices
Creators: name: Chen, Xiao-Long
name: Zheng, Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose that a nonlinear Hall response can be observed in Bloch oscillations of ultracold atoms in optical lattices under the condition of preserved time-reversal symmetry. In the short-time limit of Bloch oscillations driven by a direct current (dc) field, the nonlinear Hall current dominates, being a second-order response to the external field strength. The associated Berry curvature dipole, which is a second-order nonlinear coefficient of the driving field, can be obtained from the oscillation of atoms. In an alternating current (ac) driving field, the nonlinear Hall response has a double frequency of the driving force in the case of time-reversal symmetry.
description: 7 pages, 6 figures
title: On Hyperelliptic Manifolds
Creators: name: Demleitner, Andreas
Publisher: name: University of Bayreuth
Year: 2020
Subjects: subject: Algebraische Geometrie
subject: 510

description: Hyperelliptic surfaces arise classically in the Enriques-Kodaira classification of compact complex surfaces as the surfaces S, which are uniquely determined through the invariants kod(S) = 0, p_g(S) = 1, q(S) = 0 and 12K_S \equiv 0. Due to the work of Enriques-Severi and Bagnera-de Franchis, these surfaces are very well understood and are all isomorphic to the quotient of an Abelian surface A by a non-trivial finite group G, which acts freely on A and contains no translations. They showed that A is isogenous to a product of two elliptic curves, which allows an explicit classification of hyperelliptic surfaces. In particular, hyperelliptic surfaces are always projective. In the '90s, Herbert Lange studied higher-dimensional analogues of hyperelliptic surfaces and in 1999, he published an article, which is dedicated to the classification of projective hyperelliptic threefolds. As it turns out, Lange's classification is incomplete, and in collaboration with Fabrizio Catanese, we describe the missing case(s) of Lange's classification. More precisely, we prove the existence of a unique complete $2$-dimensional hyperelliptic threefolds A/D_4, where D_4 is the dihedral group of order 8. Motivated by the 3-dimensional case, we decided to investigate in this thesis the case of dimension 4 in more detail as well. Using group-theoretic methods, we work out the list of exactly those abstract finite groups, which admit an embedding in the group of biholomorphic self-maps of some Abelian fourfold A in such a way that the image contains no translations and acts freely on A. We will say that such a group is associated with a hyperelliptic fourfold. The question if there exist complete families of hyperelliptic threefolds (or, more generally, hyperelliptic manifolds of arbitrary dimension), which do not contain a projective manifold, remained open in Lange's article. This is studied in more detail in this thesis: we show, together with Fabrizio Catanese and Benoît Claudon, that every hyperelliptic manifold admits arbitrarily small deformations which are projective. Furthermore, we discuss in detail a special case of this result, namely the case, in which the group action on the complex torus is rigid: in this case, we construct explicitly a polarization on the complex torus coming from a direct sum of Hodge structures on CM-fields. This is a result obtained by Torsten Ekedahl around 1999.
Sin With Me
Creators: name: Kakavas, Nicholas
Publisher: name: Georgia State University
Year: 2022

description: For my thesis exhibition, Sin With Me, I have created a series of statues that physically manifest my sexual fantasies. These sculptures expose my erotic imaginings, bringing heightened visibility to issues surrounding the repression of queer love and gay sex. With states banning public school teachers from even discussing LGBTQ+ content, it is more important than ever to normalize homosexuality and make visible these taboos that persist in American society. I am doing my part to challenge these attitudes. Sin With Me is a modern gay narrative built for everyone.
Circle actions on oriented manifolds with 3 fixed points
Creators: name: Jang, Donghoon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: Let the circle group act on a compact oriented manifold $M$ with a non-empty discrete fixed point set. Then the dimension of $M$ is even. If $M$ has one fixed point, $M$ is the point. In any even dimension, such a manifold $M$ with two fixed points exists, a rotation of an even dimensional sphere. Suppose that $M$ has three fixed points. Then the dimension of $M$ is a multiple of 4. Under the assumption that each isotropy submanifold is orientable, we show that if $\dim M=8$, then the weights at the fixed points agree with those of an action on the quaternionic projective space $\mathbb{HP}^2$, and show that there is no such 12-dimensional manifold $M$.
description: Major revision. Added the assumption on the orientability of isotropy submanifolds
ฤทธิ์ยับยั้งเอนไซม์แอลฟากลูโคซิเดสของสารสกัดไมยราบ
Creators: name: อำภา คนซื่อ
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ฤทธิ์ยับยั้งเอนไซม์แอลฟากลูโคซิเดส, เบาหวาน, ไมยราบ, อะคาโบส?

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Supplementary document for Light Trapping Gratings for Solar Cells: An Analytical Period Optimization Approach - 5868964.pdf
Creators: name: Bläsi, Benedikt
name: Hanser, Mario
name: Jaeger, Klaus
name: Hoehn, Oliver
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplemental Document
The Impact of Changes in Resolution on the Persistent Homology of Images
Creators: name: Heiss, Teresa
name: Tymochko, Sarah
name: Story, Brittany
name: Garin, Adélie
name: Bui, Hoa
name: Bleile, Bea
name: Robins, Vanessa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Geometry (cs.CG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Algebraic Topology (math.AT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 68T09, 68U03, 55N31, 62R40, 54H30, 55-08

description: Digital images enable quantitative analysis of material properties at micro and macro length scales, but choosing an appropriate resolution when acquiring the image is challenging. A high resolution means longer image acquisition and larger data requirements for a given sample, but if the resolution is too low, significant information may be lost. This paper studies the impact of changes in resolution on persistent homology, a tool from topological data analysis that provides a signature of structure in an image across all length scales. Given prior information about a function, the geometry of an object, or its density distribution at a given resolution, we provide methods to select the coarsest resolution yielding results within an acceptable tolerance. We present numerical case studies for an illustrative synthetic example and samples from porous materials where the theoretical bounds are unknown.
description: accepted for the IEEE Big Data 2021 workshop: Applications of Topological Data Analysis to 'Big Data'
ผลของสารสกัดหยาบจากผิวมะกรูด (Citrus hystrix DC) และใบตะไคร้หอม (Cymbopogon nardus (Linn.)) ต่อลูกนํ้ายุงลายบ้าน
Creators: name: ลภัสรดา โงนมะณี
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ยุงลายบ้าน, ผิวมะกรูด, ตะไคร้หอม

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
TESS Experiments: Communicating Uncertainty in the Reports of the Intergovernmental Panel on Climate Change
Creators: name: Budescu, David V.
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Time-sharing Experiments for the Social Sciences (TESS) offers researchers the opportunity to capture the internal validity of experiments. Investigators submit proposals, and TESS fields successful proposals for free on a representative sample of adults in the United States. This experiment was conducted to measure the public’s understanding of climate models as conveyed by the IPCC (Intergovernmental Panel on Climate Change) and to test methods of improving that understanding. Four experimental conditions and two control conditions were included, for a total of six conditions and 556 respondents. In each condition respondents were presented with a series of statements which described climate change-related probabilities on a scale of very unlikely to very likely and asked to estimate the probability on a numerical scale of 0-100%. Respondents in the two experimental “translation” conditions were given a table alongside each statement which charted the numerical probability ranges of each category, while respondents in the experimental “verbal-numerical” conditions were presented with these numerical guidelines as a parenthetical in the text of the statement itself. This allowed for comparison of respondents’ understanding of these two clarification methods as well as comparison against the baseline level of understanding.
ผลของสารสกัดหยาบจากผลหนามแท่งต่อลูกนํ้ายุงลายบ้าน (Aedes aegypti L.)
Creators: name: วณิชาพัชร พัชรกุลเศรษฐี
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ลูกนํ้ายุงลายบ้าน, ผลหนามแท่ง, สารสกัดด้วยเอทานอล

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Quasi Static Evolution of Compact Objects in Modified Gravity
Creators: name: Yousaf, Z.
name: Bamba, Kazuharu
name: Bhatti, M. Z.
name: Farwa, U.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, the quasi static-approximation on the hydrodynamics of compact objects is proposed in $f(R, T)$ gravity, where $R$ is the scalar curvature and $T$ is the trace of stress-energy tensor, by exploring the axial and reflection symmetric space time stuffed with anisotropic and dissipative matter contents. The set of invariant-velocities is defined to comprehend the concept of quasi static-approximation. As a consequence, the evolution of compact objects is shown by analyzing the corresponding modified field, dynamical and scalar equations in this approximation to evoke all the feasible outcomes. Furthermore, the significance of kinematical quantities, modified heat-fluxes and scalar variables are found through the proposed approximation.
description: 26 pages, version accepted for publication in General Relativity and Gravitation
Homological approximations in persistence theory
Creators: name: Blanchette, Benjamin
name: Brüstle, Thomas
name: Hanson, Eric J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: Computational Geometry (cs.CG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 55N31, 16E20 (primary), 16Z05, 18G35 (secondary)

description: We define a class of invariants, which we call homological invariants, for persistence modules over a finite poset. Informally, a homological invariant is one that respects some homological data and takes values in the free abelian group generated by a finite set of indecomposable modules. We focus in particular on groups generated by "spread modules", which are sometimes called "interval modules" in the persistence theory literature. We show that both the dimension vector and rank invariant are equivalent to homological invariants taking values in groups generated by spread modules. We also show that the free abelian group generated by the "single-source" spread modules gives rise to a new invariant which is finer than the rank invariant. They are also thankful to an anonymous referee for their thorough reading of this paper and suggestions for improvement.
description: v3: accepted manuscript, v2 (sizable update): added numerous references, reorganized paper, added new section on motivation and related work (Section 3), expanded upon the relationship between homological invariants and dimensions of hom-spaces (Theorem 1.1), extended main Theorem 1.2 (formerly Theorem 1.1), corrected errors in comparisons to other invariants (Section 7). 24 pages
PERTEMUAN 5_MARET, 17-18, 2025_POPULASI DAN SAMPEL PENELITIAN_METODOLOGI PENELITIAN_UNIVERSITAS GRESIK
Creators: name: Dr. Rusdiyanto, SE,. M. Ak,. CH,. CHt
Publisher: name: Zenodo
Year: 2025

description: Capaian Pembelajaran mata Kuliah (CPMK)

Populasi

Populasi adalah subyek penelitian secara keseluruhan, yaitu seluruh satuan analisis yang menjadi target penelitian. Selaras dengan definisi Arikunto, bahwa populasi adalah keseluruhan objek penelitian atau total kelompok subjek; baik manusia, nilai, gejala, sampai fenomena yang merupakan sumber dari penelitian.

Sebagai contoh penelitian lingkup nasional, maka yang menjadi populasi adalah masyarakat seluruh Indonesia. Riset yang dilakukan bertujuan untuk mencari kecenderungan populasi, misalnya bagaimana sikap masyarakat Indonesia terhadap suatu isu politik. Guna mengetahui hal tersebut, barulah digunakan sampel penelitian.

Sampel

Berikutnya, sampel adalah bagian dari populasi. Arikunto mendefinisikan bahwa sampel merupakan wakil dari keseluruhan populasi yang diteliti.

Sampel diperlukan karena seorang peneliti tidak dapat meneliti populasi secara menyeluruh, karena besarnya dana maupun waktu yang diperlukan. Sehingga digunakan sebagian kecil dari populasi yang telah mewakili populasi tersebut.

Perbedaan Populasi dan Sampel

Dari pengertiannya, dapat dipahami bahwa perbedaan populasi dan sampel penelitian terdapat dalam lingkup atau jangkauannya.

Populasi adalah keseluruhan objek yang diteliti, sedangkan sampel adalah sebagian dari populasi tersebut.

Selain itu, populasi dan sampel penelitian juga berbeda dalam pengumpulan datanya.

Pengumpulan data populasi adalah sensus, tujuannya mendata seisi populasi untuk keperluan administrasi seperti data kependudukan atau daftar pemilih pada pemilu.

Sedangkan pengumpulan data dengan sampel adalah survei, cukup dengan bagian dalam populasi saja.
PERTEMUAN 5_MARET, 4-5, 2024_POPULASI DAN SAMPEL PENELITIAN_METODOLOGI PENELITIAN_UNIVERSITAS GRESIK
Creators: name: Dr. Rusdiyanto, SE,. M. Ak,. CH,. CHt
Publisher: name: Zenodo
Year: 2024

description: Capaian Pembelajaran mata Kuliah (CPMK)

Populasi

Populasi adalah subyek penelitian secara keseluruhan, yaitu seluruh satuan analisis yang menjadi target penelitian. Selaras dengan definisi Arikunto, bahwa populasi adalah keseluruhan objek penelitian atau total kelompok subjek; baik manusia, nilai, gejala, sampai fenomena yang merupakan sumber dari penelitian.

Sebagai contoh penelitian lingkup nasional, maka yang menjadi populasi adalah masyarakat seluruh Indonesia. Riset yang dilakukan bertujuan untuk mencari kecenderungan populasi, misalnya bagaimana sikap masyarakat Indonesia terhadap suatu isu politik. Guna mengetahui hal tersebut, barulah digunakan sampel penelitian.

Sampel

Berikutnya, sampel adalah bagian dari populasi. Arikunto mendefinisikan bahwa sampel merupakan wakil dari keseluruhan populasi yang diteliti.

Sampel diperlukan karena seorang peneliti tidak dapat meneliti populasi secara menyeluruh, karena besarnya dana maupun waktu yang diperlukan. Sehingga digunakan sebagian kecil dari populasi yang telah mewakili populasi tersebut.

Perbedaan Populasi dan Sampel

Dari pengertiannya, dapat dipahami bahwa perbedaan populasi dan sampel penelitian terdapat dalam lingkup atau jangkauannya.

Populasi adalah keseluruhan objek yang diteliti, sedangkan sampel adalah sebagian dari populasi tersebut.

Selain itu, populasi dan sampel penelitian juga berbeda dalam pengumpulan datanya.

Pengumpulan data populasi adalah sensus, tujuannya mendata seisi populasi untuk keperluan administrasi seperti data kependudukan atau daftar pemilih pada pemilu.

Sedangkan pengumpulan data dengan sampel adalah survei, cukup dengan bagian dalam populasi saja.
เชื้อแบคทีเรียก่อโรคที่ปนเปื้อนในกุ้งฝอยหลังการแช่แข็งและให้ความร้อน
Creators: name: นรินทรา บุญเขื่อง
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: กุ้งฝอย, ความร้อน, การแช่แข็ง, เชื้อแบคทีเรียก่อโรค

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Arbitrary entanglement of three qubits via linear optics
Creators: name: Blasiak, Pawel
name: Borsuk, Ewa
name: Markiewicz, Marcin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a linear-optical scheme for generation of an arbitrary state of three qubits. It requires only three independent particles in the input and post-selection of the coincidence-type at the output. The success probability of the protocol is equal for any desired state. Furthermore, the optical design remains insensitive to particle statistics (bosons, fermions or anyons). This approach builds upon the no-touching paradigm, which demonstrates the utility of particle indistinguishability as a resource of entanglement for practical applications.
description: 6 pages, 2 figures
Superfluidity of a Raman spin-orbit-coupled Bose gas at finite temperature
Creators: name: Chen, Xiao-Long
name: Liu, Xia-Ji
name: Hu, Hui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the superfluidity of a three-dimensional weakly interacting Bose gas with a one-dimensional Raman-type spin-orbit coupling at both zero and finite temperatures. Using the imaginary-time Green's function within the Bogoliubov approximation, we explicitly derive analytic expressions of the current-current response functions in the plane-wave and zero-momentum phases, from which we extract the superfluid density in the limits of long wavelength and zero frequency. At zero temperature, we check that the resultant superfluid density agrees exactly with our previous analytic prediction obtained from a phase-twist approach. Both results also satisfy a generalized Josephson relation in the presence of spin-orbit coupling. At finite temperature, we find a significant non-monotonic temperature dependence of superfluid density near the transition from the plane-wave phase to the zero-momentum phase. We show that this non-trivial behavior might be understood from the sound velocity, which has a similar temperature dependence. The non-monotonic temperature dependence is also shared by Landau critical velocity, above which the spin-orbit-coupled Bose gas loses its superfluidity. Our results would be useful for further theoretical and experimental studies of superfluidity in exotic spin-orbit coupled quantum gases.
description: 14 pages, 4 figures
การตรวจหาการติดเชื้อ Ehrlichia canis ในสุนัขจรจัดในจังหวัดมหาสารคามโดยเทคนิคทางโมเลกุล
Creators: name: ศิริอร เพ็ชรน้อย
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: Ehrlichia canis, stray dogs, Nested PCR, Thin blood smears

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
การศึกษาคุณค่าทางโภชนะของกากชานอ้อยหมักร่วมกับด่าง ความร้อน และเชื้อจุลินทรีย์ที่มีประโยชน์
Creators: name: วาสนา ศิริแสน
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: โซเดียมไฮดรอกไซด์, การนึ่งความดันไอ, เชื้อราขาว (Pleurotus sajor-caju), ปริมาณโปรตีน

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Split Conformal Prediction and Non-Exchangeable Data
Creators: name: Oliveira, Roberto I.
name: Orenstein, Paulo
name: Ramos, Thiago
name: Romano, João Vitor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Split conformal prediction (CP) is arguably the most popular CP method for uncertainty quantification, enjoying both academic interest and widespread deployment. However, the original theoretical analysis of split CP makes the crucial assumption of data exchangeability, which hinders many real-world applications. In this paper, we present a novel theoretical framework based on concentration inequalities and decoupling properties of the data, proving that split CP remains valid for many non-exchangeable processes by adding a small coverage penalty. Through experiments with both real and synthetic data, we show that our theoretical results translate to good empirical performance under non-exchangeability, e.g., for time series and spatiotemporal data. Compared to recent conformal algorithms designed to counter specific exchangeability violations, we show that split CP is competitive in terms of coverage and interval size, with the benefit of being extremely simple and orders of magnitude faster than alternatives.
อิทธิพลของเชื้อจุลินทรีย์ เอนไซม์ และระยะเวลาในการหมักที่มีผลต่อการเปลี่ยนแปลงองค์ประกอบทางเคมีของกากมันสำปะหลัง
Creators: name: วาสนา ศิริแสน
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: เชื้อจุลินทรีย์โปรไบโอติก, เอนไซม์, โปรตีน, กากมันสำปะหลัง

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
title: Η επίδραση του Ακαθάριστου Εθνικού Προϊόντος (ΑΕΠ) στις εκπομπές αερίων του θερμοκηπίου CO2 από τον κατασκευαστικό και κτιριακό τομέα
title: The effect of GDP on green house emissions CO2 from manufacturing, residential and commercial buildings
titleType: AlternativeTitle
Creators: name: Ζουμπάκη, Γεωργία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Εκπομπές CO2
subject: Κατασκευαστικός τομέας
subject: Κτιριακός τομέας
subject: Χρήση ενέργειας
subject: Περιβαλλοντική καμπύλη Kuznets (EKC)
subject: Βιώσιμα κτίρια
subject: Πράσινες πιστοποιήσεις

description: Τις τελευταίες δεκαετίες οι εκπομπές διοξειδίου του άνθρακα CO2 έχουν αυξηθεί σε σημαντικά επίπεδα προσελκύοντας το ενδιαφέρον για περαιτέρω έρευνα. Πολλές έρευνες έχουν διεξαχθεί επισημαίνοντας ισχυρή αλληλεξάρτηση του ρυθμού οικονομικής ανάπτυξης και της ενεργειακής κατανάλωσης, με αποτέλεσμα η οποιαδήποτε αύξηση στην εθνική παραγωγή να προκαλεί αύξηση στις εκπομπές CO2. Με αποτέλεσμα η υιοθέτηση πολιτικών μέτρων για αύξηση του ακαθάριστου εθνικού προϊόντος (ΑΕΠ) να συνεπάγεται την περιβαλλοντική επιβάρυνση. Η διερεύνηση αυτών των σχέσεων αποτελεί αντικείμενο της θεωρίας της περιβαλλοντικής καμπύλης Kuznets (EKC), κατά την οποία η οικονομική ανάπτυξη οδηγεί σε περιβαλλοντική υποβάθμιση. Στην παρούσα εργασία εξετάζουμε συγκεκριμένα τις εκπομπές CO2 που προκαλούν ο κατασκευαστικός και ο κτιριακός τομέας στην Ελλάδα την περίοδο 1973-2014. Κατά την εξεταζόμενη περίοδο οι εκπομπές CO2 (κατασκευαστικός και ο κτιριακός τομέας) σημειώνουν σημαντικές μειώσεις τα τελευταία χρόνια. Η χρήση ενέργειας στην Ελλάδα δείχνει να αυξάνεται τις τελευταίες δεκαετίες. Η διερεύνηση αφορά την μακροχρόνια και βραχυχρόνια σχέση του ΑΕΠ, των εκπομπών CO2 και της χρήσης ενέργειας μέσω οικονομετρικών μοντέλων, συμπεριλαμβανομένης της επίδρασης που έχει η μεταβλητή του αστικού πληθυσμού στις εκπομπές CO2. Επιπλέον εξετάζουμε την σχέση αιτιότητας των μεταβλητών μέσω του μοντέλου αιτιότητας κατά Granger και μέσω Wald test.
On Angles in Higher Order Brillouin Tessellations and Related Tilings in the Plane
Creators: name: Edelsbrunner, Herbert
name: Garber, Alexey
name: Ghafari, Mohadese
name: Heiss, Teresa
name: Saghafian, Morteza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Computational Geometry (cs.CG)
subject: Metric Geometry (math.MG)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: For a locally finite set in $\mathbb{R}^2$, the order-$k$ Brillouin tessellations form an infinite sequence of convex face-to-face tilings of the plane. If the set is coarsely dense and generic, then the corresponding infinite sequences of minimum and maximum angles are both monotonic in $k$. As an example, a stationary Poisson point process in $\mathbb{R}^2$ is locally finite, coarsely dense, and generic with probability one. For such a set, the distribution of angles in the Voronoi tessellations, Delaunay mosaics, and Brillouin tessellations are independent of the order and can be derived from the formula for angles in order-$1$ Delaunay mosaics given by Miles in 1970.
Brillouin Zones of Integer Lattices and Their Perturbations
Creators: name: Edelsbrunner, Herbert
name: Garber, Alexey
name: Ghafari, Mohadese
name: Heiss, Teresa
name: Saghafian, Morteza
name: Wintraecken, Mathijs
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Computational Geometry (cs.CG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 52C22, 52C35, 05B45

description: For a locally finite set, $A \subseteq \mathbb{R}^d$, the $k$-th Brillouin zone of $a \in A$ is the region of points $x \in \mathbb{R}^d$ for which $\|x-a\|$ is the $k$-th smallest among the Euclidean distances between $x$ and the points in $A$. If $A$ is a lattice, the $k$-th Brillouin zones of the points in $A$ are translates of each other, which tile space. Depending on the value of $k$, they express medium- or long-range order in the set. We study fundamental geometric and combinatorial properties of Brillouin zones, focusing on the integer lattice and its perturbations. Our results include the stability of a Brillouin zone under perturbations, a linear upper bound on the number of chambers in a zone for lattices in $\mathbb{R}^2$, and the convergence of the maximum volume of a chamber to zero for the integer lattice.
การประเมินคุณค่าทางโภชนะและการย่อยได้ปรากฏของโภชนะของปลายข้าวเจ้าปลายข้าวเหนียว และรำละเอียดในไก่เนื้อ
Creators: name: วาสนา สมประสงค์
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: คุณค่าทางโภชนะ, การย่อยได้ปรากฏของโภชนะ, ปลายข้าวเจ้า, ปลายข้าวเหนียว, รำละเอียด, ไก่เนื้อ

description: ฉบับพิเศษ, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
The comparison of development between Piraeus port and Haikou port
Creators: name: Baohua, Zhang
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Piraeus port
subject: Haikou port
subject: Development
subject: Infrastructure
subject: Volume

description: Η Ελλάδα και η Κίνα είναι και οι δύο αρχαίοι πολιτισμοί και μεγάλες ναυτιλιακές χώρες. Η συνεργασία μεταξύ των δύο χωρών γίνεται όλο και πιο στενή τα τελευταία χρόνια, ιδιαίτερα στον ναυτιλιακό τομέα. Σε αυτή τη διατριβή, επιλέγω δύο τυπικά λιμάνια αυτών των δύο χωρών: το λιμάνι του Πειραιά της Ελλάδας και το λιμάνι Χαϊκού της Κίνας. Στην παρούσα διπλωματική εργασία θα παρουσιαστεί και θα γίνει η σύγκριση τωνυποδομών καθώς και της ανάπτυξης όγκου μεταξύ του λιμανιού του Πειραιά και του λιμένα Χαϊκού. Η σύγκριση βασίζεται σε στοιχεία των λιμανιών, συμπεριλαμβανομένης της χωρητικότητας, του μήκους της προβλήτας, του βάθους νερού, της διεκπεραίωσης, την προβλήτα των τερματικών σταθμών, του εξοπλισμού χειρισμού κ.λπ. Η μεθοδοδολογία της SWOT analysis, που θα χρησιμοποιηθεί σε αυτή την μελέτη θα δώσει την ευκαιρία να έχουμε μια καλή κατανόηση της λειτουργίας και ανάπτυξης των διεθνών λιμένων, με αποτέλεσμα τη βαθιά γνώση της διεθνούς ναυτιλιακής βιομηχανίας. Πιο συγκεκριμένα, υπάρχουν ομοιότητες μεταξύ του λιμανιού του Πειραιά και του λιμανιού Χαϊκού όπως: • Η στρατηγική θέση ως κόμβος • Ίδιες δραστηριότητες, συμπεριλαμβανομένης της διακίνησης εμπορευματοκιβωτίων και της διαχείρισης επιβατών κρουαζιέρας και πορθμείων • Υπηρεσία logistics • Διοίκηση υπό την ίδια πλειοψηφία μετόχου κ.λπ. Κάνοντας μια ιστορική αναδρομή και παρουσίαση των λιμένων , η παρούσα διατριβή θα εστιάζεται στη σύγκριση και ανάπτυξη κάθε συγκεκριμένης δραστηριότητας. Η μελέτη θα επικεντρωθεί κυρίως στον τομέα διακίνησης εμπορευματοκιβωτίων και επιβατηγού φορτίου, που αποτελούν τις κύριες επιχειρηματικές δραστηριότητες του λιμανιού του Πειραιά και του λιμανιού Χαϊκού. Επωφελούμενοι από την πολιτική της Κίνας “One Belt – One Road” και το Hainan Free Trade Island, τα λιμάνια του Πειραιά και Haikou Port γίνονται καταλύτες για τις υπηρεσίες του μέλλοντος, αγκαλιάζοντας την ψηφιοποίηση σε κάθε λειτουργία της. Υπό την αιγίδα της COSCO Shipping, και τα δύο λιμάνια χρησιμοποιούν την x πιο προηγμένη, εξελιγμένη και πλήρως ασφαλή τεχνολογική υποδομή και υπηρεσίες για να αυξήσουν ολιστικά τις δυνατότητες εξυπηρέτησης των τελικών πελατών μας.