bluuebunny/crossref_metadata_2025 huggingface dataset:
Systemic Stress in Hunter-gatherers From the Central Pampas Dunefields (Argentina). Evaluating Linear Enamel Hypoplasia During the Holocene
Authors: Marini Narella , Flensborg Gustavo
Published: January 2023

This article aims to evaluate whether the socio-environmental changes observed in the Central Pampas Dunefields (Argentina) throughout the Holocene (ca. 11.700-350 cal yr BP) caused episodes of systemic stress in hunter-gatherer populations. Linear enamel hypoplasia was analyzed macroscopically with a 40X magnifying glass and oblique light in 337 teeth from 26 adult individuals recovered from 11 archaeological sites. Data were analyzed following three levels of observation: individual, tooth, and number of dental enamel lines. 42.3% of the individuals analyzed presented linear enamel hypoplasia. The lines affected males and females similarly. A higher frequency was observed in the Late Holocene (ca. 4200-350 cal yr. BP) about earlier periods. The age of growth-disruption events occurred between 2 and 6.05 years, and stress events are observed at earlier ages in the Late Holocene than in the Middle Holocene. The causes could be related to metabolic stress associated with weaning, variations in the availability of natural resources over time, development of infectious and parasitic diseases during changes in social organization strategies in the Late Holocene, and gastrointestinal diseases by water intake in poor conditions. Comparison at the level of the Pampas region indicates moderate to high values of linear enamel hypoplasia, suggesting the exposure of hunter-gatherer groups to recurrent episodes of stress during the early stages of postnatal life.
Multispectral Silicon Beam-Splitter for VNIR, SWIR and MWIR
Authors: MAHENDRA ROUCHIN , Chandra Ramesh
Published: January 2023

Multispectral electro-optical/infrared payloads are being developed for a variety of defence and commercial system applications. Many applications depend on its ability to detect and recognize low-contrast and distant targets in a complex environment. The development of such systems necessitates the use of specialized optical filters capable of separating different spectral bands. We have designed and developed silicon-based plate beam splitter for 45-degree angle of incidence that will be used to separate the bands from visible to MWIR. This beam-splitter separates MWIR from VNIR and SWIR. The silicon beam splitter was developed using an ion-assisted e-beam evaporation technique. An average reflection of ~ 75% in visible and ~ 83% in SWIR region was measured using double beam spectrometer 1050 from M/s Perkin Elmer. An average transmission ~ 85% in the MWIR region was measured using FTIR frontier spectrometer from M/s Perkin Elmer.
Machine Learning for the ECG Diagnosis and Risk Stratification of Occlusion Myocardial Infarction at First Medical Contact
Authors: Al-Zaiti Salah , Martin-Gill Christian , Zègre-Hemsey Jessica , Bouzid Zeineb , Faramand Ziad , Alrawashdeh Mohammad , Gregg Richard , Helman Stephanie , Riek Nathan , Kraevsky-Phillips Karina , Clermont Gilles , Akcakaya Murat , Sereika Susan , Dam Peter Van , Smith Stephen , Birnbaum Yochai , Saba Samir , Sejdic Ervin , Callaway Clifton
Published: January 2023

Patients with occlusion myocardial infarction (OMI) and no ST-elevation on presenting ECG are increasing in numbers. These patients have a poor prognosis and would benefit from immediate reperfusion therapy, but we currently have no accurate tools to identify them during initial triage. Herein, we report the first observational cohort study to develop machine learning models for the ECG diagnosis of OMI. Using 7,313 consecutive patients from multiple clinical sites, we derived and externally validated an intelligent model that outperformed practicing clinicians and other widely used commercial interpretation systems, significantly boosting both precision and sensitivity. Our derived OMI risk score provided superior rule-in and rule-out accuracy compared to routine care, and when combined with the clinical judgment of trained emergency personnel, this score helped correctly reclassify one in three patients with chest pain. ECG features driving our models were validated by clinical experts, providing plausible mechanistic links to myocardial injury.
Direct reimplantation of a transected coronary artery in acute type A aortic dissection: a case report
Authors: Song Kyungsub , Jang Woo Sung , Park Namhee , Kim Yun Seok , Kim JaeBum
Published: January 2023

Background: Retrograde aortic root dissection toward the coronary ostium is uncommon, and acute myocardial ischemia is a potentially fatal condition in this situation. Repairing dissected coronary arteries to prevent myocardial malperfusion is difficult and we introduce our technique with case presentation.
Case presentation: A 52-year-old male patient was admitted for acute type A aortic dissection. Circumferential detachment of the right coronary artery (RCA) ostium was detected intraoperatively. The proximal RCA was dissected, the intimal RCA was circumferentially detached with inner intussusception, and only adventitia was partially connected to the aortic root. Instead of performing coronary artery bypass grafting surgery to the RCA, direct RCA implantation to the ascending graft was performed after repairing the dissected lumen of the proximal RCA. Cardiopulmonary bypass weaning was smooth, and no complications related to the RCA were observed.
Conclusion: Repairing dissected coronary artery at retrograde aortic root dissection is feasible option.
Effects of Fundamental Natural Time Periods on the Seismic Performance of Base Isolated Multistory Buildings
Authors: Pandian Antony Vimal Paul , suresh sree lekhsmi , M. Vinu
Published: January 2023

This research is mainly dealt with determining the effectiveness of base isolation in multiple degree of freedom systems (MDOF) of different fundamental natural time periods (FNTP). Base isolation devices avert the detrimental ground shaking to maximum extends and mitigates the lateral forces caused by earthquakes. In this research, it is intended to study about under what circumstances base isolation system will be effective in reducing the lateral forces caused by earthquakes. Every MDOF system will be having its own FNTP with respect to its mass, stiffness and damping matrices. In order to determine the effectiveness of base isolation, five number of five-story buildings of different FNTP, i.e., 0.4 sec, 0.8 sec, 1.2 sec, 1.6 sec and 2.0 sec had been selected. Different FNTP were obtained by maintaining constant mass as well as damping matrices while changing stiffness matrix for each building. Subsequently, comparison was made between the structural responses of buildings with and without providing base isolation. Finally, it was found out that a building of lower FNTP was performing well when it was provided with base isolation.
Identify fungal diseases of cucumber (Powdery Mildew and Anthracnose) using image processing and artificial neural network approach
Authors: Hosseini Hadi , MohammadZamani Davood , Javidan Seyed Mohamad , Arbab Abbas
Published: January 2023

Plant disease can cause reduce quality and quantity of agriculture crops. In some countries farmers spend considerable time to consult with plant protection, while the time is an important factor to controlling of disease. Due to the fact that Powdery Mildew and Anthracnose fungal diseases cause the most damage in cucumber greenhouses, in this study, by presenting a non-destructive method based on image processing technique and artificial neural network, these two types of fungal diseases have been diagnosed. The steps related to the implementation of the proposed method are divided into three parts: segmentation, separation of damaged parts from the leaf and classification of the disease type class. After color and texture features were extracted from cucumber leaf samples, a multilayer perceptron neural network with error post-diffusion learning algorithm was used to separate different classes of images. Network input is the average of the main color components (R, G, B) of the images and the output is zero as a healthy leaf, number one as Powdery Mildew and number two as Anthracnose. The structure of this network was 24-3-4-3, which uses the tansig transfer function for the hidden and output layer, and among the educational functions. So back propagation (BP) algorithm in neural network by using lovenerg marquart (LM) function training has been successfully to diagnosis and classifies plant diseases in 6 second with 99.95% accuracy.
N-Doped Multi-shelled Ru-Co/Co3O4 Graphene-coated Nano- spheres as Bi-functional Electrocatalyst in Oxygen and Hydrogen Evolution Reactions
Authors: Kumar Sushant , Pathak Tara , Singh Ashish Ch. , Chattopadhyay Jayeeta
Published: January 2023

N-doped multi-shelled Ru-Co/Co3O4 graphene coated nano-spheres have been synthesized from metal organic frameworks (MOFs) using hydrothermal method. Annealing temperature of 250oC, 310oC, 380oC, 450oC and 530oC at heating rate of 2oC/min in presence of melamine under N2 atmosphere have resulted into multiple shell structured nano-spheres. Annealing temperature becomes the controlling factor in number of shell formation inside the nano-spherical materials and in better incorporation of nitrogen into the spherical structure. The present research work has shown the formation of quintupled shell structured nano-sphere at 530oC with greatest incorporation of nitrogen. Number of shell and nitrogen incorporation becomes the pivotal point of these materials’ electrocatalytic performance in water splitting. Therefore, quintupled shell structured nanospheres have shown remarkable electrocatalytic performance during water splitting with highest current density at lowest over-potential value in hydrogen and oxygen evolution reactions (HER and OER) under acidic media. Similarly, electrocatalytic activity gradually diminishes with decrease in the shell numbers inside nano-spheres.
Evaluation the Antimicrobial Action of Kiwifruit Zinc Oxide Nanoparticles against Staphylococcus aureus Isolated from Cosmetics Tools
Authors: Seddiq Sara H. , Zyara Alyaa M. , Ahmed Mais E.
Published: January 2023

This work is focused on the effects of kiwi zinc oxide (ZnO) nanoparticles that are prepared through green synthesis, on Staphylococcus aureus isolated from different cosmetic tools. Zinc acetate was utilized ions while kiwi peels extract was used as a reducing agent. The formation of zinc oxide nanoparticles (ZnO NPs) was confirmed by the change of the color from green to brown and the UV-visible spectral analysis which revealed a strong surface plasmon. In addition, transmission electron microscope, and Atomic Force Microscopy (AFM) characterization showed that ZnO NPs has a spherical shape with a mean diameter of 19.76 nm. Forty swab samples were taken from different cosmetics tools and were cultured. S. aureus was identified by the biochemical and molecular identification methods. Results showed powder sponge recorded the highest, among the cosmetic tools, that harbors staphylococci bacteria. The Minimum Inhibitory Concentration (MIC) with different concentrations (128, 64, 32 and 16) mg/ml of ZnO NPs, was studied. A well diffusion test was performed to detect S. aureus sensitivity towards Kiwi ZnO nanoparticles and the result showed that the lowest inhibition zone (of 17 mm) was produced by (16mg/ml) concentration and the greatest zone (of 27 mm) was recorded by (128mg/ml) concentration.
Intraocular lens power calculation accuracy in highly myopic patients implanted with negative power MA60MA
Authors: Matarazzo Francesco , Phylactou Maria , Din Nizar , Hussain Badrul , Maurino Vincenzo
Published: January 2023

Purpose
To investigate the accuracy of intraocular lens prediction formulas in highly myopic eyes that have been implanted with a negative-powered intraocular lens.
Methods
A retrospective review of 19 eyes that underwent uneventful phacoemulsification with negative power Acrysof MA60MA. A multiple comparison analysis test was used to compare three different set of formulas:(a) third generation formulas (SRK-T, Haigis, Hoffer Q and Holladay 1) with optimized constants, (b) third generation formulas with axial length (AL) adjustment and (c) fourth generation formulas (Barrett Universal II). Preoperative, intraoperative, and postoperative data were collected for analysis.
Results
Mean preoperative spherical equivalent was − 22.63D with a mean AL of 32.61mm. Among the group of third generation formulas with optimised constants, Haigis had the lowest mean numerical error (MNE) and mean absolute error (MAE) of 0.070D and 0.581D respectively. A significant difference was found compared to Holladay 1 and Hoffer Q formula(p < 0.05). Haigis Formula performed better among third generation formulas with AL adjustment as well (MNE − 0.658 D and MAE 0.354 D). But no statistical difference was found with SRK-T, Hoffer Q and Holladay1 with AL adjustment. Barrett Universal II Formula had MNE of 0.026 D, MAE 0.416 D. Paired t-test showed that Haigis Formula with AL adjustment and Barrett Universal II Formula performed statistically better than Haigis formula with optimized constant.
Conclusion
Our study recommends using Barrett Universal II formula or third generation formulas with AL adjustment in highly myopic patients that require a negative MA60MA IOL implantation for cataract surgery.
Time to interval cholecystectomy and associated outcomes in older people with mild gallstone pancreatitis
Authors: BLUNDELL JIAN D , GANDY ROBERT C , CLOSE JACQUELINE CT , HARVEY LARA A
Published: January 2023

Background:
Cholecystectomy on index admission for mild gallstone pancreatitis (GSP) is recommended, although not always feasible.1 This study examined rates and outcomes of older people who underwent interval (delayed) cholecystectomy at increasing time points.
Methods:
Hospitalisation and death data were linked for individuals aged ≥ 50 years admitted to hospital in New South Wales, Australia with mild GSP between 2008–2018. Primary outcome was interval cholecystectomy timing. Secondary outcomes included mortality, emergency readmission for gallstone-related disease (GSRD) (28 and 180-day), and length of stay (LOS) (index admission and total six-month GSRD).
Results:
3,003 patients underwent interval cholecystectomy: 861 (28.6%) at 1–30, 1,221 (40.7%) at 31–90 and 921 (30.7%) at 91–365 days from index admission. There was no difference in 365-day mortality between groups. Longer delay to cholecystectomy was associated with increased 180-day emergency GSRD readmission (17.5% vs 15.8% vs 19.9%, p < 0.001) and total six-month LOS (5.9 vs 8.4 vs 8.3, p < 0.001). Endoscopic retrograde cholangiopancreatography (ERCP) was increasingly required with cholecystectomy delay (14.5% vs 16.9% vs 20.4%, p < 0.001), as were open cholecystectomy procedures (4.8% vs 7.6% vs 11.3%, p < 0.001). Extended delay was proportionally more likely in patients of lower socioeconomic status, regional/rural backgrounds or who presented to a low volume or non-tertiary hospital (p < 0.001).
Conclusion:
Delay to interval cholecystectomy results in increased rates of emergency readmission, overall LOS, risks of conversion to open surgery and need for ERCP. Index admission cholecystectomy is still recommended, however when not possible, interval cholecystectomy should be performed within 30 days to minimise patient risk and healthcare burden.
Intraparenchymal Meningioma in the Parieto-Occipital Region: A Case Report of a Diagnostically Challenging Tumor
Authors: Khojah Osama , Aljohani Sara , Aldahlawi Abdulaziz , Samkari Alaa , Alzahrani Moajeb Turki
Published: January 2023

Background: Intraparenchymal meningioma is a rare entity of one of the most common brain tumors. It is challenging to diagnose preoperatively due to the vague clinical presentation and absence of stereotypical radiological features. These atypical features might mislead the differential to favor high-grade gliomas or brain metastasis.
Case presentation: We describe a case of a 46-year-old male who presented with vertigo, right-sided sensorineural hearing loss, and bilateral blurred vision. Contrast-enhanced magnetic resonance imaging (MRI) of the brain revealed a large parieto-occipital contrast-enhanced mass with a multi-loculated cystic component and diffusion restriction but without dural attachment. A gross total reaction was achieved, and the histopathological results yielded a WHO grade I meningioma diagnosis. The patient exhibited no signs of recurrence after two years of follow-up.
Conclusion: Intraparenchymal meningiomas are difficult to identify without histopathological assessment. We emphasize the importance of considering this diagnosis when outlining an initial differential as it may direct management planning. Total surgical resection is the best treatment modality for such cases; however, radiotherapy is a valuable option. The prognosis of intraparenchymal meningiomas is generally favorable.
Multiplex PCR assay for identifying five species of chigger mites in the Republic of Korea
Authors: Lee Hyeon Seung , Choi Kwang Shik
Published: January 2023

Background
Molecular date of chigger mites, disease vectors of scrub typhus, are lacking; therefore, they are typically identified morphologically. However, owing to the small size of chigger mites, they are easily damaged. Moreover, factors such as spontaneous mutation and the morphological similarity of adults make accurate classification and identification difficult. Therefore, this study aimed to develop a rapid and accurate molecular method for identifying five chigger mite species (Leptotrombidium pallidum, L. palpale, L. scutellare, L. orientale, and Euschoengastia koreaensis) that transmit scrub typhus in the Republic of Korea.
Methods
Species-specific primers for multiplex polymerase chain reaction (PCR) were designed using the internal transcribed spacer regions of 106 chigger mite samples from five species.
Results
Pieces of multiplex PCR products with unique size were created as follows: L. palpale, 933 bp; L. orientale, 747 bp; L. pallidum, 567 bp; E. koreaensis, 487 bp; L. scutellare, 244 bp).
Conclusions
A multiplex PCR-based molecular method was successfully developed for identifying five chigger mite species (mainly collected from rodents) that transmit scrub typhus in Korea and are distribute nationwide. This multiplex PCR assay will complement morphological classification, providing an accurate species identification method that will be useful for monitoring chigger mites.
Prognostic value of pretreatment procalcitonin and neutrophil– lymphocyte ratio in extensive-stage small-cell lung cancer
Authors: Chen Dongfang , Xu Jianlin , Zhao Yizhuo , Han Baohui , Zhong Runbo
Published: January 2023

Purpose To investigate the influence of pretreatment neutrophil-to-lymphocyte ratio (NLR) and procalcitonin (PCT) on progression-free survival (PFS) in extensive-stage small-cell lung cancer (SCLC) patients. Methods A total of 100 extensive-stage SCLC patients were enrolled in our study. Patients were stratified according to the median values of pretreatment NLR and PCT levels: low NLR group (NLR ≤ 3.17), high NLR group (NLR༞3.17), low PCT group (PCT ≤ 0.06; ng/ml), high PCT group (PCT༞0.06; ng/ml). The Kaplan-Meier method and multivariable Cox regression model were used to reveal the prognostic effects of pretreatment NLR and PCT on PFS. Results The median PFS of the total extensive-stage SCLC patients was 6.0 months. The median PFS of low pretreatment NLR group (NLR ≤ 3.17) was not significantly different from that of high pretreatment NLR group (6.2 months vs 5.8 months; P = 0.675). Patients with low pretreatment PCT (PCT ≤ 0.06; ng/ml) had significantly better PFS than patients with high pretreatment PCT (PCT༞0.06; ng/ml) (6.9 months vs 5.7 months; P = 0.043). With the multivariable Cox regression analysis, the response to first-line chemotherapy (P ≤ 0.001) and pretreatment PCT (HR = 0.516; 95%CI 0.326–0.817; P = 0.005) were identified as independent factors associated with PFS. Conclusion Pretreatment PCT is an independent factor associated with PFS in extensive-stage SCLC patients treated with first-line chemotherapy, but pretreatment NLR reflects no significant prognostic value in our study.
Rational curves in a quadric threefold via an SL(2, C)-representation
Authors: Chung Kiryong , Huh Sukmoon , Yoo Sang-Bum
Published: January 2023

In this paper, we regard the smooth quadric threefold Q3 as Lagrangian Grassmannian and search for fixed rational curves of low degree in Q3 with respect to a torus action, which is the maximal subgroup of the special linear group SL(2, C). Most of them are confirmations of very well-known facts. If the degree of a rational curve is 3, it is confirmed using the Lagrangian’s geometric properties that the moduli space of twisted cubic curves in Q3 has a specific projective bundle structure. From this, we can immediately obtain the cohomology ring of the moduli space.
MSC Classification: 14E05 , 14E15 , 14M15
TCA Cycle Difference is Greatly Related to the Resistance of Bacillus thuringiensis against UV Stress
Authors: Du Xi , Zhang Yile , Wu Haonan , Tan Weilong , Huang Enjiong , Guan Xiong , Zhang Lingling
Published: January 2023

Bacillus thuringiensis (Bt) is a popular and environment-friendly biopesticide. However, similar to other microbial pesticides, Bt is limited by ultraviolet (UV) radiation during its application, which greatly reduces its toxicity and persistence. To further know the mechanism of Bt against UV radiation, metabolomic profiles between Bt LLP29 and its UV-resistant mutant LLP29-M19 were compared, analyzed, and annotated in this study, and then a total of 61 metabolites with different abundances were detected. With P < 0.05 as the standard, a total of 12 metabolic pathways were enriched, including the TCA cycle. According to the result of RT-qPCR, the expression levels of the TCA cycle key genes in Bt LL29-M19, such as icd1 citZ, citB, sdhA, sdhB, sdhC, fumA and mdh, were found down-regulated for 85.58%, 37.02%, 70.87%, 85.97%, 76.33%, 83.15%, 87.28%, and 35.77% than those in Bt LLP29. It was consistent with the down-regulation trend of the TCA cycle key enzymes activity in Bt LLP29-M19. Consistently, the enzyme activities of ICDH, SDH, and PDH in LLP29-M19 were detected 86.28%, 43.93%, and 83.03% lower than those in Bt LLP29. It was revealed that the reduced TCA cycle was required for Bt UV radiation resistance, which was also demonstrated by the addition of inhibitors furfural and malonic acid, respectively. Based on the result of RT-qPCR, the gene transcription levels of the main reactive oxygen species (ROS) generation pathways were down-regulated, such as EMP, however, the activity of the main degrading enzymes was up-regulated, which showed the reduction of ROS generation rate was a way for the TCA cycle to regulate the anti-ultraviolet resistance of Bt. All of these provide solid evidence for reprogramming metabolomics to strengthen Bt UV radiation resistance.
3D CNN Based Automatic Diagnosis of ADHD Using fMRI Volumes
Authors: TAŞPINAR Gürcan , ÖZKURT Nalan
Published: January 2023

Attention deficit hyperactivity disorder (ADHD) is one of the most common mental health disorders and it is threatening especially to the academic performance of children. Its neurobiological diagnosis is essential for clinicians to treat ADHD patients properly. Along with machine learning algorithms, and neuroimaging technologies, especially functional magnetic resonance imaging is increasingly used as biomarker in attention deficit hyperactivity disorder. Also, machine learning methods have been becoming popular at last times. This study presents an optimized 3-dimensional convolutional neural network to classify functional magnetic resonance imaging volumes into two classes to assist experts in diagnosing ADHD. To demonstrate the importance of extracting 3D relationships of data, the method has been tested on ADHD-200 public datasets and its performance on the hold-out testing datasets has been evaluated. Then the network performance has been compared with several recent ADHD detection convolutional neural networks in the literature. It has been observed that the proposed network has a promising performance.
Eksenel Yüke Maruz Çelik Boru ve Kutu T-birleşimlerinin Yangın sonrası Davranışı
Authors: ÖZYURT Emre
Published: January 2023

Bu çalışma, boru ve kutu profillerden oluşmuş kafes sistem T-birleşimlerinin eksenel yük altında yangın sonrası davranışlarını sonlu elemanlar yöntemi kullanarak incelemeyi amaçlamaktadır. Bunu için farklı geometrik özelliklere sahip T-birleşimler sonlu elemanlar programı kullanılarak modellenildi. Öncelikle ısı transfer analizi yapılarak, oluşturulan sayısal modeller ISO 834 yangın eğrisine bağlı olarak ısıtıldı ve sonra soğutuldu. Yangın sonrası artık gerilmelere ve deformasyonlara maruz kalmış birleşimlere, maksimum dayanıma ulaşıncaya kadar örgü elemanı ucundan eksenel yük uygulanıldı. Tüm birleşimlerde göçme sınır durumu başlık elemanı cidarında plastikleşme olarak tespit edildi. Yangın öncesi ve sonrası birleşimlerin dayanımları karşılaştırıldı. Sayısal sonuçlardan elde edilinen bilgilere göre yangın sonrası tübüler T-birleşimlerin dayanımları %23,5 ’a kadar düşmektedir. Ayrıca, birleşimler üzerindeki sıcaklık dağılımları, örgü-başlık eleman oranlarına ve başlık elemanının et kalınlıklarına bağlı olarak değişmektedir. Yangın sonrasında oluşan artık gerilme ve deformasyonlar boru ve kutu T-birleşimlerin dayanımlarına önemli derecede etki etmektedir.
Mikrotremor Verilerinde Çapraz Spektrum ve Güç Spektrumu Tekniği Kullanılarak Zemin Büyütmesinin Belirlenmesi
Authors: GÜRBÜZ Mustafa
Published: January 2023

Zemin büyütmesi ve etkin frekansların belirlenmesinde en çok tercih edilen yöntem Nakamura HVSR tekniğidir. Çapraz Spektrum ve Güç Spektrumu tekniği; yatay ve düşey bileşenin çapraz spektrumunun, düşey bileşenin güç spektrumuna oranlanması temeline dayanan bir tekniktir. Bu çalışmada, Burdur İl Merkezinde yapılan mikrotremor çalışmalarına ait sonuçlar HVSR Tekniği ile birlikte Çapraz Spektrum ve Güç Spektrumu Tekniğini kullanarak veriler değerlendirilmiş ve karşılaştırılmıştır. Her iki yöntemde elde edilen etkin frekanslar % 96 ile %100 arasında değişen bir oranda uyumlu sonuçlar vermiştir. Buna karşın bu frekanslarda, HVSR spektrumları zemin büyütmesi değerleri %20 ile % 60 daha büyük değerler vermiştir. HVSR tekniğinden hesaplanan hasar görebilirlik katsayıları 0,7 ile 4,3 arasında değişen değerler verirken, Çapraz Spektrum ve Güç Spektrumu tekniğinden hesaplanan hasar görebilirlik katsayıları ise 0,1 ile 4,8 arasında değişen değerler vermiştir. Genel olarak her iki yöntemde de yüksek frekanslarda büyütme değerlerinde bir artış olduğu görülmüştür. Zemin büyütmesi ve hasar görebilirlik değerlerinin büyük olduğu noktalar, Burdur İl merkezini etkileyecek bir deprem anında yüksek yapısal hasar riski olan alanları göstermesi bakımından önemlidir.
Genelleştirilmiş Kuantum Işınlama Protokolü
Authors: KAYA Emir Oğuz
Published: January 2023

Bu çalışma kapsamında literatürde var olan tek kubit(kuantum bit) ışınlanma/telenakil (quantum teleportation) protokolünün çok kubit sistemlere genellenmesi incelenmiştir. Ardından, birden fazla hedefe telenakil olanakları tartışılarak, buna dair bir protokol önerilmiştir. Geliştirilen teorik çerçeve kapsamında, kubitler üzerinde değişiklik yapan kuantum mantık kapılarının da genellenmesi tartışılmıştır. Söz konusu kuantum mantık kapılarının genel versiyonları oluşturulmuş olup, literatürdeki özel durumlar için çalıştıkları gösterilmiştir. Işınlanmanın çok kubit-çok hedefe genellenmesi sonucu kurulan teorik çerçevede oluşan denklemlerin bir örüntü içerdiği belirlenmiş olup, bu örüntü aracılığı ile karmaşık tensör çarpımları ile tek tek uğraşmaksızın da protokolün gerçekleştirilebileceği bir yol önerilmiştir.

Çalışma kapsamında çok kubit - tek hedef, çok kubit – çok hedef protokollerine yönelik Python bilgisayar programları oluşturulmuştur. Oluşturulan programların, sunulan teorik çerçevenin ön gördüğü sonuçları başarılı bir şekilde ürettiği gözlenmiştir. Bu programlar aracılığı ile, uzun ve hata yapma olasılığı yüksek matematiksel işlemlerin kısa sürede ve hatasız yapılabilmesinin olanağı yaratılmıştır. Oluşturulan program sonuçları aynı zamanda, yukarıda bahsedilen örüntünün varlığını kanıtlamaktadır.
Tip-2 Montaj Hattı Dengeleme ve İşgücü Atama Problemi için Doğrusal Programlama Yaklaşımı: Bir Vaka Çalışması
Authors: DEMİRKOL AKYOL Şebnem
Published: January 2023

Montaj hattı dengeleme problemi belirli işlem sürelerine sahip olan işlerin, öncelik ilişkileri göz önünde bulundurularak, çeşitli amaçları eniyileyecek şekilde iş istasyonlarına atanmasıdır. Bilimsel yazında montaj hattı dengeleme problemini çözebilmek amacıyla birtakım varsayımlarda bulunulmuştur. Bunlardan bir tanesi, hat dengelenirken işçilerin özdeş olduğu ve bir işin işlem süresinin işçiden işçiye değişmeyip sabit kaldığı varsayımıdır. Ancak gerçek hayat montaj hatlarında çalışan işçilerin özdeş olduğunu varsaymak mantıklı bir yaklaşım değildir, çünkü her bir işçinin kendine has bilgi birikimi, fiziksel kapasitesi, beceri düzeyi gibi özellikleri vardır. Dolayısıyla, aynı işi farklı işçilerin işleme süreleri eşit olmamaktadır. Gerçek hayat uygulamalarıyla bilimsel yazın arasındaki bu kopukluğu gidermek amacıyla montaj hattı dengeleme ve işgücü atama problemi sunulmuştur. Montaj hattı dengeleme ve işgücü atama problemi, aynı anda hem işlerin işçilere, hem de işçilerin istasyonlara atandığı bir çifte atama problemidir. Bu çalışmada, endüstriyel buzdolabı üretimi yapan bir firmaya ait montaj hattında dengeleme ve işgücü atama çalışması yapılmıştır. Çalışma kapsamında, tamsayılı bir doğrusal matematiksel model önerilmiş ve Lingo çözücüsü yardımıyla çözülmüştür. Elde edilen sonuçlar, hattın çevrim süresinin 4784sn’den 2725sn’ye düşürüldüğünü ve aynı zamanda hattın etkinliğinin de %66’dan %94’e yükseldiği göstermiştir. Burada önemli olan nokta ise, bu iyileştirmelerin hiçbir ekstra maliyet ortaya çıkarmadan sağlanmış olmasıdır.
Örenli metamorfitlerinin jeokimyası, kökeni ve tektonik yerleşimi (Çanakkale, Biga Yarımadası, KB Türkiye)
Authors: ŞENGÜN Fırat
Published: January 2023

Örenli metamorfitleri (Çanakkale) KB Türkiye’de Biga Yarımadası’nın güney kesiminde yüzlek vermektedir. Makroskobik ve petrografik gözlemlere dayanarak bu kayalar başlıca metapelit. metabazit ve mermer ardalanmasından oluşmaktadır. Örenli metamorfitlerinde baskın litolojiyi oluşturan şistler sarımsı kahverenkli. iyi foliasyonlu ve ince-orta kristallidir. Petrografik analizler şistlerin başlıca kuvars, Klorit, feldspat ve mika mineralleri içerdiğini göstermektedir. Klorit minerallerinin biyotit minerallerinden dönüşmüş olarak gözlenmesi Örenli metamorfitlerinin yeşilşist fasiyesinde metamorfizma geçirmiş düşük dereceli metamorfik kayalar olduğunu işaretler. Şistler içerisindeki feldspatların bolluğu yakındaki kaynak kayalarından hızlı bir sediment çökeliminin olduğunu belirtir. Bu metamorfik kayalardan kaynak alanlarının. çökelme havzalarının ve tektonik ortamlarının ortaya çıkarılması amacıyla ana. iz ve nadir toprak elementi analizleri yapılmıştır. Ana element jeokimyası ve iz element oranları (örneğin Th/Sc, La/Th, Cr/V ve Y/Ni) ise bu tür kayaların baskın olarak ortaç-felsik bileşimde olan kaynak kayalarından türediğini ifade etmektedir. Benzer şekilde Örenli metamorfitlerinin olası kaynak alanları Devoniyen ve Karbonifer yaşlı kayalardan oluşan Sakarya Zonu’nun kristalin temelidir. Ana ve hareketsiz iz elementlere (örneğin Th-Co-Zr/10 ve Th-Sc-Zr/10) ve La/Y-Sc/Cr oranlarına dayanılarak oluşturulan tektonik ortam ayrım diyagramlarında metapelitik kayalar pasif kıta kenarı ve okyanusal ada yayı ortamlarında çökelmiştir. Petrografik ve jeokimyasal sonuçlara göre metapelitik kayalar iki farklı kaynaktan türemiş olabilir. Birincisi. kıtasal kaynaktan kuvars ve metamorfik kırıntılar gelmiştir. Diğeri ise volkanik bir yaydan feldspat. plajioklas ve volkanik kırıntılar gelmiştir. Diğer bir deyişle metapelitik kayalar yay gerisi havzada hem aktif volkanik yaydan hem de kıtadan malzeme almıştır.
Saman Takviyeli Yüksek Yoğunluklu Polietilen Kompozitlerin Mekanik Özellikleri ve Su Emme Kapasitelerindeki Değişimlerin İncelenmesi
Authors: KISMET Yılmaz , DOĞAN Akar
Published: January 2023

Bu çalışmada, poliolefinler grubunun önemli bir üyesi olan yüksek yoğunluklu polietilen ile saman bitkisinden oluşan kompozitler üretilmiştir. Kompozit malzemeler, yüksek yoğunluklu polietilen içerisine saman takviyesi ağırlıkça %5, %10 ve %20 oranlarında takviye edilerek üretilmiştir. Bu karışımlar öncelikle mekanik olarak karıştırılmış daha sonra homojen bir karışım oluşturabilmek için 160 ila 180 oC sıcaklıklar arasında ekstrüzyondan geçirilmiştir. Ekstrüzyon sonrası elde edilen karışım önce soğutma havuzunda soğutulmuş daha sonra kırıcıdan geçirilerek granül hale getirilmiştir. Elde edilen bu granüller plastik enjeksiyon makinasında kalıplara basılarak standart test numuneleri üretilmiştir. Üretilen kompozitlerin takviye malzemesi oranı ile mekanik özelliklerindeki ve su emme kapasitelerindeki değişimler incelenmiş ve sonuçlar grafik ve tablo olarak verilmiştir. Kompozit malzemlerin çekme mukavemtleri, üç nokta eğilme mukavemetleri ve izod darbe dayanımları analiz edilmişdir. Malzemelerin çekme ve izod darbe dayanımları azalırken, eğilme mukavemetinde iyileşme gözlenmiştir.
Fotovoltaik Modüllerde Elektrostatik Temizleme Yöntemiyle Tozlanma Kayıplarının Azaltılması Üzerine Deneysel Bir Çalışmanın Değerlendirilmesi
Authors: GÜMÜŞ Harun , ÇUBUKÇU Mete
Published: January 2023

Bu çalışma, bir fotovoltaik modül için tasarlanmış bir elektrostatik temizleme sistemini analiz etmektedir. Elektrostatik temizleme yönteminin performansını değerlendirmek için katlanır bir ızgara mekanizması oluşturulmuştur. Bu mekanizmaya yerleştirilen iletkenler, artı ve eksi kutuplar birbirine dik olacak şekilde konumlandırılmıştır. Çalışma kapsamında gerilim, toz yoğunluğu ve temizleme işleminin süresi olmak üzere üç değişken analiz edilmiştir. Uygulanan gerilimin temizleme performansı için en belirleyici faktör olduğu görülmüştür. Gerilim miktarı yükseltildikçe, temizleme veriminin de arttığı tespit edilmiştir. 30 g/m2 toz ve 3 dk. boyunca yapılan temizleme işlemlerinde bakır iletkenlere 2,5 kV, 3 kV ve 3,5 kV gerilim uygulanmıştır. Elde edilen temizleme verimleri sırasıyla % 59,52, % 71,39 ve % 83,36’dır. En iyi temizleme verimi ise belirli bir toz yoğunluğunda (30 g/m2) ortaya çıkmıştır. Üç dakikayı aşan temizleme sürelerinde verim artışı ihmal edilebilir seviyededir.
Mikrodenetleyici Tabanlı Esnek, Güçlü Dijital Gecikmeli Darbe Üreteci Sistem Tasarımı ve Optoelektronik Uygulamaları
Authors: GÜNGÖR Tayyar , GÜNGÖR Ebru
Published: January 2023

Bu çalışmada, esas olarak mikrodenetleyici tabanlı çok kanallı ve kanal genişliği ayarlanabilen bir dijital geçikmeli darbe üreteci (DGDÜ) tasarımı gerçekleştirilmiştir. Bu sistemde mikrodenetleyici (PIC18F4550), kristal osilatör (8 MHz) ve 4 giriş 16 çıkışlı kodlayıcı/kodçözücü entegresi (74LS154) kullanarak 1µs-1s arasında 25 farklı genişlikte zaman-taban sinyalleri üretilmiştir. Tetikleme sinyalinden sonra seçilen zaman-taban genişliğinde ardışık olarak 32 kanallı zaman-geçiktirme dijital darbe sinyalleri elde edilmiştir. DGDÜ sistemi, ilk olarak genlik-zaman bağımlılığı bilinen referans üçgensel sinyalin bir tam periyodu içinde seçilen iki zaman pencere değerine karşı gelen sinyal genlik değerlerinin 2-kanallı örnekle-tut devresinin de bulunduğu Sinyal Analiz Birimi (SAB) ile test edilmiştir. Elde edilen sonuçların bilinen gerçek değerler ile karşılaştırılması yapılmıştır. Sonuçların uyumlu olduğu gözlenmiştir. Daha sonra ticari bir ürün olan ve ışığa duyarlı bir direnç (LDR) için oda sıcaklığında, kesikli aydınlatma ile oluşan foto-akımın zamanla matematiksel formunun belirlenmesi için kullanılmıştır. Sonuç olarak, bu yeni mikrodenetleyici tabanlı çok kanallı DGDÜ ve SAB ile hızlı, işlevsel ve esnek özellikleri olan bir otomatik veri toplama sistemi gerçekleştirilmiştir. Ayrıca derin seviyeli transient spektroskopi (DLTS), foto-uyarımlı akım transiyent spektroskopisi (PICTS) gibi yarıiletken mazlemelerin karakterizasyonları için kullanımı kolay ve ticari çift-örnekleme sistemlerine göre daha ucuz olması nedeniyle tercih edilebilir bir sistemdir.
PERSPECTIVES OF TEACHERS ONLINE AND PRACTICAL KNOWLEDGE IN COVID -19 PANDEMIC ERA
Authors: Wahyuni Sri
Published: January 2023

Exploration of task preparation for teaching learning process TLP on online for educational time by the time remains high agenda for seeking new ways and means to improve the TLP. This is the challenges for the teacher to be presented in the implementation of teacher education programme that is convenient for the learners in TLP, as solution to the challenges in Education System in the era digital. Teachers prepare role of implementation step by step to learn and practice the necessary knowledge skills and attitudes to become teachers’ competence  in the education system. Hopefully they are able to channel information to others for digital online. This research based on the covid-19 pandemic Era,  that all activieties have done from home ( WFH),  teachers must be proactive individually to expand their skill and  join mentoring,  training and briefing technical also seminar/workshop online for their ability in a pedagogical social, attitude, and professionalism. There are  merits and demerits classes conducted via zoom and Google Classroom  in  TLP. Where as  anything can be accomplished in the traditional classroom done electronically, information / material in TLP could be stored via technology but construction of knowledge especially  a teacher cannot be replicated online. The aim of the study was examine the  online media  are applied  in TLP for senior high school using zoom and google classroom as a medium, It also explored  their beliefs about merits and demerits and investigated  their   practical knowledge do the  teachers use, for meaningfulness of classes conducted via zoom on  TLP  in Covid -19 pandemic era as opposed to face to face classes. Qualitative data were collated and analyzed  using descriptive statistics to . The conclusion were that zoom and google classroom classes were satisfying and convenient for teachers and others perceived them a litle resistance,  and for the students 66,7 % like daring and 33,3 % didn’t like daring .
Dynamic obstacle avoidance and trajectory planning of five-axis redundant industrial manipulator
Authors: Ma Jian
Published: January 2023

Aiming at the problem that five axis redundant industrial manipulator dynamic obstacle avoidance and trajectory planning algorithm does not consider the minimum difference of each joint of the manipulator, which leads to low success rate of obstacle avoidance planning, slow convergence speed of path cost and long time of obstacle avoidance planning, a simulation study on dynamic obstacle avoidance trajectory planning of five axis redundant industrial manipulator is proposed. According to the D-H rule, the coordinate system of each link joint of the five axis redundant industrial manipulator is established, and the forward and inverse kinematics of the five axis redundant industrial manipulator is analyzed. AABB's hierarchical bounding box tree algorithm is used to detect the collision of five axis redundant industrial manipulator. This paper uses harmony search algorithm to plan the obstacle avoidance path of five axis redundant industrial manipulator, determines the objective function and constraints of the optimization problem, sets algorithm parameters, initializes harmony memory, creates new harmony, updates harmony memory, checks and searches the target state, achieves the maximum number of iterations, and realizes the dynamic obstacle avoidance and trajectory planning of five axis redundant industrial manipulator. The experimental results show that the path cost of the proposed algorithm converges faster, and can effectively improve the success rate of obstacle avoidance planning and shorten the time of obstacle avoidance planning.
Top-dressing treatment of spring barley to modify its quality
Authors: Noskova Evgenia , Lisitsyn Eugene , Shchennikova Irina , Svetlakova Elena
Published: January 2023

New barley products can be developed by modifying the content of bioactive components in the grain through breeding, as well as improving its quality at lower fertilizer costs. We aimed to study the effects of the genotype, growth conditions, and top-dressing application of nitrogen and organo-mineral fertilizers on the chemical composition of barley grain. The barley varieties Novichok, Rodnik Prikamya, and Pamyaty Rodinoy were grown under normal (2020) and dry (2021) field conditions. The plants were top-dressed with mineral (CAS; SpetsKhimAgro, Kirovo-Chepetsk, Russia) or organo-mineral (Amino Start and Alfastim; Polydon® Agro, Moscow, Russia) fertilizers in the tillering or heading phases. The contents of protein, starch, fat, and crude fiber in the grain were analyzed with an INFRAMATIC 8620 instrument (Perten Instruments, Stockholm, Sweden). The CAS fertilizer reduced protein, fat, and fiber by 4.5–8.3% (Novichok) during the drought and increased starch by 2.1% (Novichok), fiber by 14.2% (Rodnik Prikamya), and fat by 18.9% (Pamyaty Rodinoy) under normal humidity. Amino Start applied under normal conditions increased starch by 2.9% and reduced protein and fat by 7.8–8.9% in Rodnik Prikamya, as well as increased protein and fat by 14.4 and 6.3%, respectively, but reduced starch by 5.1% in Pamyaty Rodinoy. Alfastim applied under normal conditions reduced the content of protein by 10.7% (Rodnik Prikamya), but increased it by 3.6–7.2% in the other cultivars. It also increased fiber by 22.8% in Rodnik Prikamya, but decreased it by 18.6% in Pamyaty Rodinoy. Finally, this fertilizer decreased fat by 12.7% in Rodnik Prikamya, but increased it by 9.8% in Pamyaty Rodinoy. In the drought, the fertilizers Alfastim and Amino Start increased the protein content by 5.2–12.2% in Rodnik Prikamya and Pamyaty Rodinoy. Top-dressing barley plants with mineral or organo-mineral fertilizers can modify the grain composition (up to 10.4% of fiber, 3.6% of starch, and 7.5% of protein and fat), depending on the consumer’s requirements.
Manejo de plagas de sésamo en Etiopía: una revisión
Authors: Alemu Zemedkun , Taye Workishet
Published: January 2023

Sesame is Ethiopia’s most significant oil crop, especially Tigray, Amhara, and some lowland Oromia, Somalia, and the Gambella region. Consequently, the crop is exposed to a wide range of insect pests feeding on leaves, flowers, pods, and seeds affecting sesame yields. This article review provides information on the biology, nature of the damage, and management methods of economically important sesame pests. Sesame webworm, Antigastra catalaunalis (Duponchel) is the most common and frequently encountered pre-harvest pest of sesame. Sesame seed bugs, Elasmolmus sordidus (Fabricus) is also the most serious under field and storage conditions. Gall fly, Asphondylia sesami (Felt) could become a severe insect issue because of sesame gall formation, and Indian meal moth, Plodia interpunctella (Hubner) is a critical stored pest and a significant challenging of crop sesame in Ethiopia. Reports on minor pests are also listed. This paper summarizes current knowledge on pest management strategies, including cultural, biological, and botanical methods, and pesticide applications. The information gathered here indicates that the bioecology, host range, host plant resistance, the occurrence of insecticide resistance, and the development of integrated pest management methods for economical insect pests need to be addressed.
La distancia euclidiana puede reconocer el mejor genotipo y entorno de Stevia para producir rebaudiósido y esteviósido en condiciones controladas
Authors: Tapia y Figueroa María de Lourdes , Gómez Pando Luz R.
Published: January 2023

Stevia rebaudiana se considera una importante planta medicinal que posee edulcorantes glucósidos bajos en calorías. El presente trabajo describe la comparación de tres genotipos de stevia (IBT 1, IBT 2 e IBT 3) en dos ambientes contrastantes simulados bajo condiciones controladas: Sullana en Perú; y Misiones en Paraguay (considerado como el centro de origen de la Stevia). Exploramos la distancia euclidiana como un indicador integrador para la selección simultánea de varios rasgos de stevia. Los científicos de plantas suelen registrar múltiples indicadores morfológicos, fisiológicos y bioquímicos en sus experimentos. Las evaluaciones de datos estadísticos comunes implican análisis univariados como la prueba t, Mann-Whitney y el análisis de varianza seguido de Tukey HSD. Sin embargo, dichos análisis no evalúan integralmente los efectos de los tratamientos experimentales porque cada indicador se analiza de forma independiente. Se calculó la distancia euclidiana de cada combinación de tratamientos al fenotipo ideal de las plántulas de stevia. IBT 2 cultivado en condiciones ambientales de Sullana presentó los mejores resultados integrales, mientras que IBT 1 mostró los peores resultados. El análisis indica que el uso de la distancia euclidiana podría contribuir a establecer una evaluación más integrada de los genotipos contrastantes de Stevia. Así también, puede ayudar a comparar diferentes rasgos fenotípicos.
Patrick Declerck, un écrivain chez les clochards. Projet et objet littéraire nonidentifié
Authors: Almeida José Domingues de
Published: January 2023

In this article, we will discuss a particular case of engagement of a French-speaking Belgian writer (Partick Declerck) who, in addition to a literary activity, was interested in the social, psychoanalytic, and therapeutic question of the tramps of Paris whose precarious existence he followed empirically for some time. Les Naufragésis the account
Le témoignage entre le « je » et le « nous » ou quand l’intime devient politique dans l’oeuvre d’Annie Ernaux et Chahdortt Djavann
Authors: Coelho Ana Beatriz
Published: January 2023

This study offers a critical reading of several contemporary modalities of engagement outlined in the socio-literary trajectories of writers Annie Ernaux and Chahdortt Djavann. In the works of these writers, the dimensions that arise from a desire to renew how the writer intervenes are visible through a writing style which continually blurs the borders between fiction and documentary, individual perceptions of the world and the collective dimension of events. In doing so, it will interrogate the power of witnessing as a means of making possible the interchangeability of that which is private and that which is public.
Sitting Position and Low Back Pain (LBP) Incidents in Online Learning During the Pandemic of Covid-19: A Correlational Study
Authors: Wilandika Angga , Firdaus Zainab Zakiyah Zahrotul , Rahmat
Published: January 2023

COVID-19 has an impact on the education sector. Transitioning from face-to-face to online learning puts students at risk for back pain as they must perform most tasks in a sitting position with a non-ergonomic posture. The aim was to analyze the relationship between the sitting position and low back pain during online learning. In this study, we used a cross-section design. A total of 224 nursing students participated in the study. Sampling was done randomly, and data collection using online questionnaires. Data analysis was done descriptively and inferentially. The Chi-Square test was used to determine the correlation between sitting position and low back pain. The results showed that almost half (49.1%) of students sat down when learning online, and the incidence of low back pain in students was as much as 45.1%. In addition, the results also showed no significant association (p-value = 7,035 ≥ 0.05; r = 0.030) between sitting position and low back pain incidence in nursing students during online learning during the COVID-19 pandemic. The sitting position factor is not the primary determinant of low back pain. Therefore, further research is needed concerning other low back pain events.