Showing papers by "Military Academy published in 2013"

Process of inducing pores in membranes by melittin

Abstract: Melittin is a prototype of the ubiquitous antimicrobial peptides that induce pores in membranes. It is commonly used as a molecular device for membrane permeabilization. Even at concentrations in the nanomolar range, melittin can induce transient pores that allow transmembrane conduction of atomic ions but not leakage of glucose or larger molecules. At micromolar concentrations, melittin induces stable pores allowing transmembrane leakage of molecules up to tens of kilodaltons, corresponding to its antimicrobial activities. Despite extensive studies, aspects of the molecular mechanism for pore formation remain unclear. To clarify the mechanism, one must know the states of the melittin-bound membrane before and after the process. By correlating experiments using giant unilamellar vesicles with those of peptide-lipid multilayers, we found that melittin bound on the vesicle translocated and redistributed to both sides of the membrane before the formation of stable pores. Furthermore, stable pores are formed only above a critical peptide-to-lipid ratio. The initial states for transient and stable pores are different, which implies different mechanisms at low and high peptide concentrations. To determine the lipidic structure of the pore, the pores in peptide–lipid multilayers were induced to form a lattice and examined by anomalous X-ray diffraction. The electron density distribution of lipid labels shows that the pore is formed by merging of two interfaces through a hole. The molecular property of melittin is such that it adsorbs strongly to the bilayer interface. Pore formation can be viewed as the bilayer adopting a lipid configuration to accommodate its excessive interfacial area.

Use of washed municipal solid waste incinerator bottom ash in pervious concrete

Abstract: Washed municipal solid waste incinerator bottom ash (MSWIBA) was used in this study as a substitute for natural aggregate in pervious concrete. The mix proportions of the concrete were first determined using a vertical flow test. Other tests, including permeability, compressive strength, bending and split tensile strength tests, were also performed. The test results show that the unit weight of the fresh pervious concrete made with MSWIBA was approximately 1653–2080 kg/m 3 and increased with the ratio of cement paste filling. In specimens with the same water–cement ratio, the compressive, bending and split tensile strengths all increased with the ratio of filling paste. The split tensile and bending strengths were approximately 1/9 and 1/4 of the compressive strength, respectively. The connected porosity and permeability coefficients are linearly correlated; both decrease as the filling ratio is increased.

Virtual-Sensor-Based Maximum-Likelihood Voting Approach for Fault-Tolerant Control of Electric Vehicle Powertrains

Abstract: This paper describes a sensor fault-tolerant control (FTC) for electric-vehicle (EV) powertrains. The proposed strategy deals with speed sensor failure detection and isolation within a reconfigurable induction-motor direct torque control (DTC) scheme. To increase the vehicle powertrain reliability regarding speed sensor failures, a maximum-likelihood voting (MLV) algorithm is adopted. It uses two virtual sensors [extended Kalman filter (EKF) and a Luenberger observer (LO)] and a speed sensor. Experiments on an induction-motor drive and simulations on an EV are carried out using a European urban and extraurban driving cycle to show that the proposed sensor FTC approach is effective and provides a simple configuration with high performance in terms of speed and torque responses.

Application of dendritic cells stimulated with Trichinella spiralis excretory–secretory antigens alleviates experimental autoimmune encephalomyelitis

Abstract: The parasitic nematode, Trichinella spiralis (T. spiralis), exerts an immunomodulatory effect on the host immune response through excretory–secretory products (ES L1) released from encysted muscle larvae. Our model of combined T. spiralis infection and experimental autoimmune encephalomyelitis (EAE) in Dark Agouti (DA) rats demonstrated a significant reduction in EAE severity in infected animals. Recently, we have created an immune status characteristic for the live infection by in vivo application of dendritic cells (DCs) stimulated with ES L1 products of T. spiralis muscle larvae. Moreover, these cells were able to ameliorate EAE when applied 7 days before EAE induction. ES L1-stimulated DCs increased production of IL-4, IL-10 and TGF-β, and decreased production of IFN-γ and IL-17, both at the systemic level and in target organs. A significant increase in the proportion of CD4+CD25+Foxp3+ T cells was found among spleen cells, and CNS infiltrates from DA rats treated with ES L1-stimulated DCs before EAE induction, compared to controls injected with unstimulated DCs. Regulatory T cells, together with elevated levels of IL-10 and TGF-β, are most likely involved in restraining the production of Th1 and Th17 cytokines responsible for autoimmunity and thus are responsible for the beneficial effect of ES L1-educated DCs on the course of EAE. Our results show that ES L1 antigen-stimulated DCs are able not only to provoke, but also to sustain anti-inflammatory and regulatory responses regardless of EAE induction, with subsequent amelioration of EAE, or even protection from the disease.

Assessing Gains in Language Proficiency, Cross-Cultural Competence, and Regional Awareness During Study Abroad: A Preliminary Study

Abstract: As a critical part of the internationalization movement in college curricula, study abroad initiatives are becoming more and more popular and the need to assess their outcomes more and more evident. While numerous studies have investigated the language gain associated with study abroad, researchers are also beginning to look at potential gains in the areas of cultural and regional competence. This study presents a theoretical background for a three-tiered model for assessing student outcomes during study abroad in three domains—language proficiency, cross-cultural competence, and regional awareness—and presents the quantitative data gathered from the implementation of this model. Results show the feasibility of assessing these outcomes in a holistic manner through formal assessment instruments and participant coaching pre- and post-immersion.

Evaluation of primary stability of self-tapping and non-self-tapping dental implants. A 12-week clinical study.

Abstract: Purpose: The aim of this study was to investigate the relationship between surgical techniques and implant macro-design (self-tapping/non-self-tapping) for the optimization of implant stability in the low-density bone present in the posterior maxilla using resonance frequency analysis (RFA). Materials and Methods: A total of 102 implants were studied. Fifty-six self-tapping BlueSkyBredent® (Bredent GmbH&Co.Kg®, Senden, Germany) and 56 non-self-tapping Standard Plus Straumann® (Institut Straumann AG®, Waldenburg, Switzerland) were placed in the posterior segment of the maxilla. Implants of both types were placed in sites prepared with either lateral bone-condensing or with bone-drilling techniques. Implant stability measurements were performed using RFA immediately after implant placement and weekly during a 12-week follow-up period. Results: Both types of implants placed after bone condensing achieved significantly higher stability immediately after surgery, as well as during the entire 12-week observation period compared with those placed following bone drilling. After bone condensation, there were no significant differences in primary stability or in implant stability after the first week between both implant types. From 2 to 12 postoperative weeks, significantly higher stability was shown by self-tapping implants. After bone drilling, self-tapping implants achieved significantly higher stability than non-self-tapping implants during the entire follow-up period. Conclusions: The outcomes of the present study indicate that bone drilling is not an effective technique for improving implant stability and, following this technique, the use of self-tapping implants is highly recommended. Implant stability optimization in the soft bone can be achieved by lateral bone-condensing technique, regardless of implant macro-design.

A scalable heuristic for viral marketing under the tipping model

Abstract: In a “tipping” model, each node in a social network, representing an individual, adopts a property or behavior if a certain number of his incoming neighbors currently exhibit the same. In viral marketing, a key problem is to select an initial “seed” set from the network such that the entire network adopts any behavior given to the seed. Here we introduce a method for quickly finding seed sets that scales to very large networks. Our approach finds a set of nodes that guarantees spreading to the entire network under the tipping model. After experimentally evaluating 31 real-world networks, we found that our approach often finds seed sets that are several orders of magnitude smaller than the population size and outperform nodal centrality measures in most cases. In addition, our approach scales well—on a Friendster social network consisting of 5.6 million nodes and 28 million edges we found a seed set in under 3.6 h. Our experiments also indicate that our algorithm provides small seed sets even if high-degree nodes are removed. Last, we find that highly clustered local neighborhoods, together with dense network-wide community structures, suppress a trend’s ability to spread under the tipping model.

A new digital signature scheme based on chaotic maps

Abstract: In the present e-commerce and e-government era, digital signatures have become more and more important. Digital signature algorithms can be categorized based on the type of security suppositions, for example discrete logarithm, factorization hard-problems, and elliptic curve cryptography, which are all currently believed to be unsolvable in a reasonable time period. Recently, cryptosystems based on chaotic maps have been proposed. Due to some subtle and close relationships between the properties of traditional cryptosystems and chaotic systems, the idea of chaotic systems with applications to cryptography has received a great deal of attention from researchers from a variety of disciplines. Therefore, to enhance system security, we explore the implementation of a digital signature algorithm based on both cryptographic and chaotic system characteristics. We also give a proof that the security of the proposed scheme can protect against the known key attacks.

Ar I and Ne I spectral line shapes for an abnormal glow discharge diagnostics

Abstract: We report the results of an Ar I and Ne I line shape study in an abnormal glow discharge operating in argon and neon. The spectral lines were observed along the axis of a cylindrical glow discharge parallel (side-on) and perpendicular (end-on) to the cathode surface. The side-on spectra show spectral line shifting and sometimes simultaneous shifting and splitting in the cathode fall region of the glow discharge. The results of the measured line shift with available data for the dc Stark effect are used for measurement of electric field strength in the cathode fall region of the glow discharge. Electron temperatures of 2860 K and 4770 K in the negative glow region of argon and neon discharges, respectively, were determined from the relative intensities of Ar I or Ne I lines using the Boltzmann plot technique. An electron number density of ≈1020 m−3 (±25%) in the negative glow region of the argon discharge was determined from the widths of two plasma-broadened Ar I lines using theoretical Stark broadening data. The end-on recorded line profiles show 10–40% larger half-widths than the side-on recorded line profiles from the negative glow. This effect is a result of the superposition of line emission in the cathode fall region under the influence of the dc Stark effect on the line profile from the negative glow.

Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water

Abstract: In this work multiwalled carbon nanotubes (MWCNTs) modified by oxidation (o-MWCNTs) and by aminofunctionalization (e-MWCNTs) were examined as potential adsorbents for arsenate removal from water. Adsorption characteristics of raw and modified MWCNTs were investigated in batch adsorption experiments. The influence of solution pH (pH range 3–10), contact time, and temperature (25, 35, and 45°C) were studied. Ethylenediamine-functionalized MWCNTs have the greatest affinity for arsenate ions, followed by o-MWCNTs and raw-MWCNTs. The obtained experimental data for raw- and o-MWCNTs fitted Sips isotherm model, while for the e-MWCNTs, the Freundlich model provided the best fit to the experimental points. The maximum adsorption capacity for arsenate ions was achieved using e-MWCNTs, 12.18 mg g−1. The presence of the arsenate on the adsorbent is confirmed by FTIR spectroscopy. Thermodynamic studies indicated the spontaneity and endothermic nature of the adsorption. Sodium hydroxide solution (0.1 M) was found to de...

Electrochemical production, characterization, and application of MWCNTs

Abstract: The subject of this study is production of carbon nanotubes (CNTs) using an original procedure of reduction of lithium molten salts onto graphite cathode; their structural characterization and application as support material for electrocatalysts aimed for hydrogen evolution. As-produced CNTs were characterized by means of scanning and transmission electron microscopy (SEM and TEM), Raman spectroscopy, and thermogravimetric and differential thermal analysis (DTA). SEM and TEM images have shown that nanotubes are mostly of curved shape with length of 1–20 μm and diameter of 20–40 nm. Raman peaks indicate that the crystallinity of produced nanotubes is rather low. The obtained results suggest that formed product contains up to 80 % multiwalled carbon nanotubes (MWCNTs), while the rest being non-reacted graphite and fullerenes. DTA curves show that combustion process of the nanotubes takes place in two stages, i.e., at 450 and 720 °C. At the lower temperature, combustion of MWCNTs occurs, while at higher one, fullerenes and non-reacted graphite particles burn. As-produced MWCNTs were used as electrocatalyst’s support materials and their performance was compared with that of traditional carbon support material Vulcan XC-72. MWNTs have shown almost twice higher real surface area, and electrocatalyst deposited on them showed better catalytic activity than corresponding one deposited on Vulcan XC-72.

Colloidal stability of gadolinium-doped ceria powder in aqueous and non-aqueous media

Abstract: We would like to thank grants PSE-120000-2008-0040 and MAT2009-14324-C02-01, financed by the Spanish Government (Ministerio de Ciencia e Innovacion) and Feder Program of the European Community, and PI/116, financed by the Aragon Government.

Energy consumption in mechanical systems using a certain nonlinear degenerate model

Abstract: In modern engineering materials used for creating effective ballistic shields, the issues of evaluation of their energy consumption are extremely important. The paper presents a new way of solving this problem using a certain degenerate model with dry friction. This method involves the use of specially derived identification equations which describe the decrease in potential energy of the system during its vibratory motion induced by a single pulse load. Analytical considerations have been verified using a computer simulation technique for selected examples.

Global Content in Global Coursebooks: The Way Issues of Inappropriacy, Inclusivity, and Connectedness Are Treated in Headway Intermediate

Abstract: This study aims at exploring the issue of “globality” in global coursebooks as manifested in investing features of connectedness, avoiding inappropriacy, and preserving inclusivity. To do this exploration, two research methods, content analysis and the questionnaire, were adopted. The content of an example of global coursebooks, Headway Intermediate (H/I), in addition to the perception of 251 of its users at Institute Bourguiba for Living Languages (IBLV) were investigated. The results obtained revealed that “globality,” in terms of connectedness, inappropriacy, and inclusivity is partial in H/I as learners’ perceptions of it do not map with the content in the coursebook. This study raises questions about the suitability of global coursebooks to globally diverse learners and reveals the necessity of taking measures in the direction of localizing the content of English as a foreign language (EFL) coursebooks.

A model for the pavement temperature prediction at specified depth

Abstract: B. Matić, D. Matić, Đ. Ćosić, S. Sremac, G. Tepić, Faculty of Technical Sciences, University of Novi Sad, Serbia P. Ranitović, University of Defense, Military Academy, Belgrade, Serbia This paper examines the existing models for predicting pavement temperatures at a certain depth and formulates a new one using the regression equation to predict the minimum and maximum pavement temperatures at the specifi ed depth depending on the surface pavement temperature and its depth.

Integration of INS, GPS, Magnetometer and Barometer for Improving Accuracy Navigation of the Vehicle

Abstract: This paper describes integrated navigation system that is based on a low cost inertial sensor, global positioning system (GPS) receiver, magnetometer and a barometer, in order to improve accuracy of complete attitude and navigation solution. The main advantage of integration consists in availability of reliable navigation parameters during the intervals of absence of GPS data. The magnetometer and the barometer are applied for the attitude calibration and vertical channel stabilization, respectively. The acceptable accuracy of inertial navigation system (INS) is achieved by the proper damping of INS errors. The integration is made by the implementation of an extended Kalman filter (EKF) with control signal that is designed appropriate for low accuracy sensors noise characteristics. The analysis of integrated navigation system performances is made experimentally and the results show that integrated navigation system provides continuous and reliable navigation solutions. Defence Science Journal, 2013, 63(5), pp.451 -455 , DOI:http://dx.doi.org/10.14429/dsj.63.4534

Experimental techniques for ballistic pressure measurements and recent development in means of calibration

Abstract: This paper presents a study carried out with the commonly used experimental techniques of ballistic pressure measurement. The comparison criteria were the peak chamber pressure and its standard deviation inside specific weapon/ammunition system configurations. It is impossible to determine exactly how precise either crusher, direct or conformal transducer methods are, as there is no way to know exactly what the actual pressure is; Nevertheless, the combined use of these measuring techniques could improve accuracy. Furthermore, a particular attention has been devoted to the problem of calibration. Calibration of crusher gauges and piezoelectric transducers is paramount and an essential task for a correct determination of the pressure inside a weapon. This topic has not been completely addressed yet and still requires further investigation. In this work, state of the art calibration methods are presented together with their specific aspects. Many solutions have been developed to satisfy this demand; nevertheless current systems do not cover the whole range of needs, calling for further development effort. In this work, research being carried out for the development of suitable practical calibration methods will be presented. The behavior of copper crushers under different high strain rates by the use of the Split Hopkinson Pressure Bars (SHPB) technique is investigated in particular. The Johnson-Cook model was employed as suitable model for the numerical study using FEM code

Research on durability of composite materials used in repairing aircraft components

Abstract: The paper presents methodology and results of research on durability of composite materials, which were applied to expedient repair of damaged aircraft components. Numerical calculation and experimental tests were conducted during research. The obtained results proved that failure of aircraft components is connected with local loss of stability in case of aircraft’s skin and stiffness in case of girders and beams. The damaged components were repaired with the use of a metal insert and a composite patch. The use of a metal insert, which had the same stiffness as repaired elements, was a solution which allowed to restore local stiffness of repaired components. Composite patches which were formed with glass, carbon or aramid fabrics impregnated with epoxy resins, also created an adhesive bonds and joined all elements of repaired zone. The experimental tests proved that the executed repairs whose time was limited to 120 minutes improved stability, stiffness and fatigue life of the repaired components.

Application of adaptive neuro fuzzy inference system in the process of transportation support

Abstract: The possibility for more confidential predictions, leaning on scientific methods and accomplishments of information technology leaves more time for the realization of logistic needs. Longstanding ambitions to acquire desired levels of efficiency within the system with minimal costs of resources, materials, energy and money are the features of executive structures of logistic systems. A successful logistic process is based on validation of technological development, indicating the need for a faster and more confidential integration of logistic systems and "instilling confidence" with military units that provide critical support (supply, transport and maintenance) will be reliably realized according to relevance and priority. Conclusions like these impose the necessity that the decision-making process of logistic organs is accessed carefully and systematically, since any wrong decision leads to a reduced state of readiness for military units. To facilitate the day-to-day operation of the Army of Serbia and the completion of both scheduled and unscheduled tasks it is necessary to satisfy the wide range of transport requirements. In this paper, the Adaptive Neuro Fuzzy Inference System (ANFIS) is described, thus making possible a strategy of coordination of transport assets to formulate an automatic control strategy. This model successfully imitates the decision-making process of the chiefs of logistic support. As a result of the research, it is shown that the suggested ANFIS, which has the ability to learn, has a possibility to imitate the decision-making process of the transport support officers and show the level of competence that is comparable with the level of their competence.

Lithuanian manufacturing trends in the context of developed and developing countries

Abstract: The purpose of this paper is to assess the main aspects of the Lithuanian manufacturing industries in the global context. Two approaches are prevailing in the scientific studies analyzing structural changes of economy. The first seeks to identify statistically certain change in economic structure using three-sector hypothesis. The second approach focuses on in-depth structural analysis of the particular sector over time. This study supports the second approach and examines the structural changes in the manufacturing industry of developed and developing countries and draw the Lithuanian picture on the basis of 2000-2009. To this end, two economics tools, namely, the structural changes indicators and Finger-Kreinin dissimilarity index are applied for this purpose. The main findings related to the manufacturing sector's structural tendencies of the Lithuanian economy in the context of developed and developing countries. First of all, the manufacturing industry is looked from the point of view of three economies, such as developed, developing countries and Lithuania's. The author highlights the main trends of manufacturing industry in global context. After further in-depth analysis of the Lithuanian manufacturing structural changes in the context of developed and developing countries has been carried out and new evidence on manufacturing distribution profiles has been provided, concluding remarks have been made. The insights from this study could be useful guide to the Lithuanian manufacturing industry for the need to promote sustainable development in the global context.

Chemoselective esterification of α-hydroxyacids catalyzed by salicylaldehyde through induced intramolecularity

Abstract: A new, direct and chemoselective esterification of α-hydroxyacids was developed using a reversible covalent-binding strategy. By taking advantage of acetal chemistry, simple aldehydes can be used to efficiently catalyze the esterification of α-hydroxy carboxylic acids in the presence of β-hydroxyacid moieties or other carboxylic acids in amounts equal to or in excess of the alcohols. A diverse array of α-aryl, α-alkyl, α-heteroaryl, and functionalized α-hydroxyacids were smoothly esterified with 1° and 2° alcohols catalyzed by 10 mol% inexpensive and commercially available salicylaldehyde, furnishing the resultant esterification products in 83–95% yields after a simple basic aqueous workup to remove the unreacted hydroxyacids. In addition, the salicylaldehyde can be recovered through vacuum distillation or silica gel purification, thereby meeting the standards of green chemistry. A mechanistic study proved that the formation of covalent adduct III during our proposed catalytic cycle (Scheme 1A) is responsible for the real catalysis.

An Experimental Study of the Tribological Characteristics of Engine and Gear Transmission Oils

Abstract: During the past few decades, special attention has been devoted to developing modern instruments and methods of monitoring the tribomechanical characteristics of technical systems. Today, various physical, chemical and tribological methods are used in tribomechanical systems diagnosis. Scientific experience in technical system exploitation and maintenance has shown that the most effective way to predict failure is based on parameters that are reliable indicators of wear. Analysis of oil samples, which contain particles due to the wear process, enables an evaluation of the tribology condition of the system in the early phases of its use. This paper deals with tribological tests that are part of the oil analysis and are used to access the condition of the system. Furthermore, the results of experimental research on the tribological characteristics of the oil sampled from engines and gear transmissions of the vehicles (Mercedes O 345, PUCH 300GD and PINZGAUER 710M) are shown. All of these road vehicle were in regular use by the Serbian armed forces. The performed research has revealed some significant changes in the tribological characteristics of oil for engine and gear transmission lubrication.. These changes directly depend on the condition of the entire engine and transmission elements, i.e. depend on their functional characteristics. The presented method of oil analysis should contribute to an early detection of failures due to friction and wear processes in vehicle engines and reduce the need for preventive maintenance.

Spinal Textiloma (Gossypiboma): A Report of Three Cases Misdiagnosed as Tumour

Abstract: Background: Textile products commonly used in surgery (e.g., sponges or gauze) have been known to cause complications after spinal surgery. Associated complications usually arise months or even years after the primary surgery. In case of spine surgery, these bodies are often detected during neuroradiological evaluations to investigate reported back pain; however, this complication often remains asymptomatic. Aims: The research is intended to increase awareness among both spinal surgeons and neuroradiologists of this potential complication. Study Design: Retrospective study. Methods: This study is a retrospective case series of three patients with retained surgical textile products who had been misdiagnosed with spinal tumour. The medical records of the patients were reviewed and demographic data, clinical aspects, initial diagnosis, surgical procedures, time interval between previous operation and onset of symptoms, laboratory findings, radiological findings, treatment, and outcome were analysed. Results: The three patients included two women and one man aged between 64 and 67 years. All patients had a previous surgery for lumbar disc herniation. The time from the previous surgical procedures to presentation ranged from 3 to 17 years. All patients presented with non-specific lower back pain and/or radiculopathy without clinical findings of infection. Laboratory parameters were otherwise normal. All three cases had been misdiagnosed as a spinal tumor based on magnetic resonance imaging findings. During new surgical procedures, gauze bandages, i.e., surgical textiles left during a previous operation, were found. Conclusion: Textiloma is an important and rarely mentioned potential neurosurgical complication that may remain asymptomatic for years. They are more common in obese patients, after emergency surgery, and with unplanned changes in surgical procedure such as bleeding and unintended neurosurgical complications. Neuroradiological findings are variable and non-specific; thus, patients could be misdiagnosed with a spinal tumor or abscess. Likewise, in patients with a history of spinal surgery, spinal abscesses, haematomas, hypertrophic scars, fibrosarcomas, rhabdomyosarcomas, and schwannomas should definitely be considered in the differential diagnosis and considered when planning diagnostic procedures. Appropriate antibiotic therapy is recommended when a suppurative complication is present or suspected. Textiloma is a medico-legal complication that can be prevented by the education of surgical staff, the counting method (preoperatively, at closure, and at the end), and use of products with radiopaque barcodes. Turkish Baslik Spinal Tekstiloma (Gossipiboma): Tumor Olarak Yanlis Tani Konan Uc Olgu Sunumu Arkaplan: Cerrahide yaygin olarak kullanilan tekstil urunlerinin (or. sungerler veya gazli bezler) spinal cerrahi sonrasi komplikasyonlara neden oldugu bilinmektedir. Iliskili komplikasyonlar genellikle ilk ameliyattan aylar, hatta yillar sonra ortaya cikmaktadir. Omurga cerrahisi durumunda, bu cisimler genellikle bildirilen sirt agrisini arastirmak icin yapilan nororadyolojik degerlendirmeler sirasinda tespit edilir, bununla birlikte bu komplikasyon siklikla asemptomatik olarak kalmaktadir. Amac: Arastirma hem spinal cerrahlar hem de nororadyologlar arasinda bu potansiyel komplikasyona farkindaligi artirmayi amaclamaktadir. Calisma Tasarimi: Retrospektif calisma. Yontemler: Bu calisma, spinal tumor olarak yanlis tani konmus olan, cerrahi tekstil urunleri kalmis uc hastanin retrospektif bir olgu serisidir. Hastalarin tibbi kayitlari incelendi ve demografik veriler, klinik yonleri, ilk tani, cerrahi islemler, onceki ameliyat ve semptomlarin baslamasi arasindaki sure, laboratuvar bulgulari, radyolojik bulgular, tedavi ve sonuclari analiz edildi. Bulgular: Uc hasta, yaslari 64 ve 67 yil arasinda olan iki kadin ve bir adamdan olusmaktaydi. Tum hastalar lomber disk hernisi icin onceden ameliyat olmustu. Onceki cerrahi islemlerden basvuruya kadar gecen sure 3 ila 17 yil arasinda degismekte idi. Tum hastalar enfeksiyonun klinik bulgulari olmaksizin radikulopati ve/veya non-spesifik bel agrisi ile basvurdu. Bunun disinda laboratuvar parametreleri normaldi. Her uc olgu da manyetik rezonans goruntuleme bulgularina dayanarak bir spinal tumor olarak yanlis tani almisti. Yeni cerrahi islemler sirasinda, gazli bezler, yani bir onceki islem sirasinda birakilan cerrahi tekstil bulundu. Sonuc: Tekstiloma yillarca asemptomatik kalabilen, onemli ve nadiren bahsedilen potansiyel bir norosirurji komplikasyonudur. Obez hastalarda, acil cerrahi sonrasi siktir ve cerrahi islemde kanama gibi planlanmamis bir degisiklik ile birliktedir ve istenmeyen norosirurji komplikasyonlaridir. Nororadyolojik bulgular degiskendir ve non-spesifiktir; boylece, hastalar spinal tumor veya apse olarak yanlis tani alabilir. Ayni sekilde, spinal cerrahi oykusu olan hastalarda, spinal apse, hematom, hipertrofik skar, fibrosarkom, rabdomyosarkom ve svannom kesinlikle ayirici tanida dusunulmelidir ve tani prosedurleri planlanirken dikkate alinmalidir. Supuratif komplikasyon mevcut veya supheli oldugunda uygun antibiyotik tedavisi onerilir. Tekstiloma bir mediko-legal komplikasyondur ve cerrahi personelin egitimi, sayma yontemi (preoperatif olarak, kapama sirasinda ve sonunda) ve radyoopak barkodlu urun kullanimi ile onlenebilir.