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Cullen, Eileen M., and Frank G. Zalom. "On-Farm Trial Assessing Efficacy of Three Insecticide Classes for Management of Stink Bug and Fruit Damage on Processing Tomatoes." Plant Health Progress 8, no. 1 (January 2007): 23. http://dx.doi.org/10.1094/php-2007-0323-01-rs.
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Five foliar insecticides representing a neonicotinoid (thiamethoxam), a pyrethroid (lambda-cyhalothrin), a neonicotinoid plus pyrethroid (thiamethoxam and lambda-cyhalothrin), and two organophosphates (dimethoate and methamidophos, respectively) were evaluated for relative efficacy in managing consperse stink bug (Euschistus conspersus Uhler) on California processing tomatoes. E. conspersus density and percentage fruit damage were measured at harvest in an on-farm experiment at two locations in 2002, and small plot experiments in 2002 and 2003. Results showed that thiamethoxam plus lambda-cyhalothrin, lambda-cyhalothrin, and methamidophos can provide equivalent control of E. conspersus on processing tomatoes. Relative efficacy of the same treatments was inconsistent when applied before completion of small nymph development as estimated by the E. conspersus phenology model. Results can be utilized by growers with canning contracts that limit total organophosphate active ingredient per season, or in cases where stink bug treatment thresholds are reached within the processor preharvest interval for organophosphates. Insecticide efficacy evaluation is discussed within the context of continued research to provide IPM-compatible insecticide options to growers facing low processor tolerance for stink bug damaged fruit, and organophosphate insecticide restrictions in tomato canning contracts. Accepted for publication 22 November 2006. Published 23 March 2007.
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Xu, Z., and Z. Liao. "Optimization of Suzhou Creek Rehabilitation Project Stage I." Water Science and Technology 52, no. 9 (November 1, 2005): 69–75. http://dx.doi.org/10.2166/wst.2005.0290.
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Suzhou Creek is a seriously polluted tidal river in Shanghai, China. With the development of Shanghai, there is more and more concern over the “blackness and stink” phenomenon of Suzhou Creek. Suzhou Creek Rehabilitation Project was launched in 1998, and the planning investment of the Project Stage I was 8.65 billion yuan (about 1.05 billion US dollars). It is important to predict the effectiveness of the project and to optimize it. In this study, the USEPA's WASP model is employed to establish a water quality model of Suzhou Creek by using data from the Third Trial Low Flow Augmentation on Suzhou Creek in 1999 and other monitoring results. Based on this, Suzhou Creek Rehabilitation Project Stage I is optimized and adjusted, so the actual investment of the Project Stage I is reduced to 6.99 billion yuan. By implementing the Project Stage I, the targets of Stage I have been met, the “blackness and stink” phenomenon of the mainstream was eliminated by the end of 2000, and the ecological system was improved step by step.
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Malek, Robert, Livia Zapponi, Anna Eriksson, Marco Ciolli, Valerio Mazzoni, Gianfranco Anfora, and Clara Tattoni. "Monitoring 2.0: Update on the Halyomorpha halys Invasion of Trentino." ISPRS International Journal of Geo-Information 8, no. 12 (December 10, 2019): 564. http://dx.doi.org/10.3390/ijgi8120564.
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“BugMap” is a citizen science mobile application that provides a platform for amateur and expert scientists to report sightings of two invasive insect pests, the tiger mosquito Aedes albopictus Skuse (Diptera: Culicidae) and the brown marmorated stink bug, Halyomorpha halys Stål (Hemiptera: Pentatomidae). The latter is a notorious pest of fruit trees, vegetables, ornamentals, and row crops, inflicting severe agricultural and ecological disturbances in invaded areas. Our approach consists of coupling traditional monitoring with citizen science to uncover H. halys invasion in Trentino. The project was initiated in 2016 and the first results were reported in 2018. Here, we revisit our initiative four years after its adoption and unravel new information related to the invader dispersal and overwintering capacity. We found that our previous model predicted the current distribution of H. halys in Trentino with an accuracy of 72.5%. A new MaxEnt model was generated by pooling all reports received so far, providing a clearer perspective on areas at risk of stink bug establishment in this north Italian region. The information herein presented is of immediate importance for enhancing monitoring strategies of this pest and for refining its integrated management tactics.
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van Oosten, Roos. "The Dutch Great Stink: The End of the Cesspit Era in the Pre-Industrial Towns of Leiden and Haarlem." European Journal of Archaeology 19, no. 4 (2016): 704–27. http://dx.doi.org/10.1080/14619571.2016.1147677.
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In the nineteenth century, the continuous discharge of sewage from millions of Londoners into the River Thames caused a notorious, unbearable stench during the summer, which reached a climax in 1858 and became known as The Great Stink. In this article it is argued that such a ‘Great Stink’ also occurred in the booming and heavily populated pre-industrial town of Leiden, because cesspits were being replaced by sewers draining directly into canals. Flawed as cesspits may have been, the new, hygienic sewer infrastructure meant the advent of unsanitary conditions normally only associated with the era of the Industrial Revolution. How and why the cesspit was killed off is explained by comparing Leiden with the seventeenth-century boom town of Haarlem, where cesspits remarkably survived the ‘Golden Age’ of the seventeenth century. Using the stakeholder model it becomes clear that the shift in hygienic infrastructure was not the outcome of a single stakeholder calling the shots but was the result of interactions between tenants, housing developers, local government, and textile entrepreneurs (in the case of Leiden), or brewers (in Haarlem).
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PANIZZI, ANTÔNIO RICARDO, JOSÉ ROBERTO POSTALI PARRA, CLÁUDIA HIRT SANTOS, and DIOGO RODRIGUES CARVALHO. "Rearing the southern green stink bug using an artificial dry diet and an artificial plant." Pesquisa Agropecuária Brasileira 35, no. 9 (September 2000): 1709–15. http://dx.doi.org/10.1590/s0100-204x2000000900002.
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Laboratory and greenhouse studies were conducted with an artificial dry diet to rear nymphs, and with an artificial plant as substrate for egg laying by the southern green stink bug, Nezara viridula (L.). The artificial diet was composed of: soybean protein (15 g); potato starch (7.5 g); dextrose (7.5 g); sucrose (2.5 g); cellulose (12.5 g); vitamin mixture (niacinamide 1 g, calcium pantothenate 1 g, thiamine 0.25 g, riboflavin 0.5 g, pyridoxine 0.25 g, folic acid 0.25 g, biotin 0.02 mL, vitamin B12 1 g - added to 1,000 mL of distilled water) (5.0 mL); soybean oil (20 mL); wheat germ (17.9 g); and water (30 mL). Nymphs showed normal feeding behavior when fed on the artificial diet. Nymphal development time was longer than or similar to that of nymphs fed on soybean pods. Total nymphal mortality was low (ca. 30%), both for nymphs reared on the artificial diet, and for nymphs fed on soybean pods. At adult emergence, fresh body weights were significantly (P<0.01) less on the artificial diet than on soybean pods. Despite the lower adult survivorship and fecundity on artificial plants than on soybean plants, it was demonstrated for the first time that a model simulating a natural plant, can be used as a substrate for egg mass laying, in conjunction with the artificial diet.
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Yonow, Tania, Darren J. Kriticos, Noboru Ota, Gonzalo A. Avila, Kim A. Hoelmer, Huayan Chen, and Valerie Caron. "Modelling the Potential Geographic Distribution of Two Trissolcus Species for the Brown Marmorated Stink Bug, Halyomorpha halys." Insects 12, no. 6 (May 25, 2021): 491. http://dx.doi.org/10.3390/insects12060491.
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The brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), is native to northeast Asia. It was accidentally introduced to Europe and North America, where it has become a key pest, feeding on many important crops. Previous eco-climatic niche modelling indicates that H. halys could expand its distribution vastly, and numerous border interceptions of this pest in many countries, including Australia and New Zealand, indicate that it would be prudent to prepare for its eventual arrival. Similar niche modelling was used to assess the potential distribution of Trissolcus japonicus (Ashmead) (Hymenoptera: Scelionidae), the key parasitoid of H. halys in China. Trissolcus mitsukurii (Ashmead) is one of the main parasitoids of H. halys in Japan. It is known to have existed in Australia since the early 20th century and was also specifically introduced to Australia in the 1960s, and it has now also invaded Italy. We used CLIMEX to model the climatic niche of T. mitsukurii to estimate its global potential distribution. We found that T. mitsukurii should be able to significantly expand its range globally, and that there is a significant degree of overlap in the projected ranges of T. mitsukurii, T. japonicus and H. halys. From a biological control perspective, this implies that the two Trissolcus species may be able to help mitigate the potential impacts of H. halys.
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Stoeckli, Sibylle, Raphael Felber, and Tim Haye. "Current distribution and voltinism of the brown marmorated stink bug, Halyomorpha halys, in Switzerland and its response to climate change using a high-resolution CLIMEX model." International Journal of Biometeorology 64, no. 12 (August 28, 2020): 2019–32. http://dx.doi.org/10.1007/s00484-020-01992-z.
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Abstract Climate change can alter the habitat suitability of invasive species and promote their establishment. The highly polyphagous brown marmorated stinkbug, Halyomorpha halys Stål (Hemiptera: Pentatomidae), is native to East Asia and invasive in Europe and North America, damaging a wide variety of fruit and vegetable crops. In Switzerland, crop damage and increasing populations have been observed since 2017 and related to increasing temperatures. We studied the climatic suitability, population growth, and the number of generations under present and future climate conditions for H. halys in Switzerland, using a modified version of the bioclimatic model package CLIMEX. To address the high topographic variability in Switzerland, model simulations were based on climate data of high spatial resolution (approx. 2 km), which significantly increased their explanatory power, and identified many more climatically suitable areas in comparison to previous models. The validation of the CLIMEX model using observational records collected in a citizen science initiative between 2004 and 2019 revealed that more than 15 years after its accidental introduction, H. halys has colonised nearly all bioclimatic suitable areas in Switzerland and there is limited potential for range expansion into new areas under present climate conditions. Simulations with climate change scenarios suggest an extensive range expansion into higher altitudes, an increase in generations per year, an earlier start of H. halys activity in spring and a prolonged period for nymphs to complete development in autumn. A permanent shift from one to two generations per year and the associated population growth of H. halys may result in increasing crop damages in Switzerland. These results highlight the need for monitoring the spread and population development in the north-western part of Switzerland and higher altitudes of the valleys of the south.
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Fabichaki Paz, Matheus, Yasmin Regina Diel, Patrícia Paula Bellon, and Jonas Felipe Recalcatti. "Efficiency of insecticides on nymphs and adults of Dichelops melacanthus(Dallas, 1851) (Hemiptera: Pentatomidae)." COLLOQUIUM AGRARIAE 17, no. 2 (April 16, 2021): 16–29. http://dx.doi.org/10.5747/ca.2021.v17.n2.a426.
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Thegreen-belly stink bug, Dichelops melacanthus, stands out as one of the main pests of the corn crop, mainly for its potential damage at the beginning of crop development, due to the sap suction at the base of seedlings, causing tillering and trimming symptoms, decreasing productivity and product quality. Aiming at the control of thestink bug, the objective of the present research was to evaluate the effect of insecticides, as well as the lethal time(LT50) of these products on D. melacanthus. To perform the tests, it was used third instar nymphs and adults of D. melacanthusaged up to 72 hours, which were individualized in Petri dishes. For the application of the insecticide, corn leaves were collected and placed in plastic trays. With the aid of a pressurized spray, the insecticides Acefathe + Aluminum silicate (5 g/L), Thiamethoxam + Lambda-Cyhalothrin (1 mL/L), Imidacloprid + Bifenthrin (1.75 mL/L), Bifenthrin + Zeta-Cypermethrin (0.75 mL/L) and Azadiractin (10 mL/L) were applied. In the control, only distilled water was applied. Subsequently, the pulverized leaf pieces were individualized in the Petri dishes, where the third instar and adult bedbugs were already allocated. After application, each treatment was evaluated at 15, 30 minutes, 1, 3, 5, 24 and 48 hours, accounting for insect mortality. Tocorrect mortality, the values were transformed using the Scheneider-Orelli formula. The relationship between the periods of action of the insecticides on the mortality rate of insects was verified by nonlinear regression analysis, using the mathematical model of dose-response. All chemical insecticides evaluated were effective in controlling third instar nymphs; however, when applied to adults, Thiamethoxam + Lambda -Cyhalothrin and Acefathe + Aluminum silicate had reductions in bedbug mortality. Azadiractin showed low efficiency in controlling nymphs and adults of D. melacanthus. Insecticides showed better LT50 in nymphs when compared to adults. The insecticides Imidacloprid + Bifenthrin, Thiamethoxam + Lambda -Cyhalothrin and Bifenthrin + Zeta-Cypermethrin obtained the best LT50 responses for nymphs and adults of the green-belly stink bug. All chemical insecticides evaluated can be used in the integrated management of D. melacanthus.
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Wright, M. G., P. A. Follett, and M. Golden. "Long-term patterns and feeding sites of southern green stink bug (Hemiptera: Pentatomidae) in Hawaii macadamia orchards, and sampling for management decisions." Bulletin of Entomological Research 97, no. 6 (November 12, 2007): 569–75. http://dx.doi.org/10.1017/s0007485307005305.
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AbstractSouthern green stink bug (Nezara viridula, Hemiptera: Pentatomidae) is a pest of macadamia nuts, causing pitting to kernels by feeding. In spite of its pest status, many aspects of the ecology of this insect in macadamia orchards are poorly understood. This study analyzes long-term N. viridula damage to macadamia nuts and investigates the extent to which damage to nuts occurs in the tree canopy, prior to nut-drop. We show that there are distinct seasonal peaks in damage detected after harvest and that, over six years of data collection, mean damage levels were fairly low, albeit with spikes in damage levels recorded. Sampling nuts at peak harvest periods from different strata in the trees and from the ground showed that incidence of damaged nuts within the canopy was typically half as high as on the fallen nuts. Damage to fallen nuts may have occurred prior to nut-drop, and continued to accumulate after nut-drop. These results show that management of N. viridula within macadamia canopies, as opposed to only on fallen nuts, is important. A sampling procedure and predictive model for estimating late-season damage based on early-season damage samples is provided. The model uses January and March damage measurements (based on samples with set level of accuracy), mean temperature and month of the year for which damage is predicted. Early-season damage of 6–10% predicts late-season damage levels that should justify N. viridula suppression based on the nominal threshold (13% damage) used by kernel processors to reject nuts based on damage.
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Živković, Ivana Pajač, Slaven Jurić, Marko Vinceković, Marija Andrijana Galešić, Marijan Marijan, Kristina Vlahovićek-Kahlina, Katarina M. Mikac, and Darija Lemic. "Polyphenol-Based Microencapsulated Extracts as Novel Green Insecticides for Sustainable Management of Polyphagous Brown Marmorated Stink Bug (Halyomorpha halys Stål, 1855)." Sustainability 12, no. 23 (December 3, 2020): 10079. http://dx.doi.org/10.3390/su122310079.
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The brown marmorated stink bug (Halyomorpha halys Stål, 1855) is an invasive polyphagous species that threatens fruit growing both in the United States and Europe. Many pesticide active ingredients have been studied in H. halys management, but for sustainable fruit growing, which implies the reduction of chemical harm to the environment, new safe insecticides should be implemented into the practice. For this purpose, novel green insecticide based on natural polyphenols of species Stevia rebaudiana (Bertoni) Bertoni and Aronia melanocarpa (Michx.) Elliott 1821 was developed. Stevia leaves (SLE) and Aronia pomace (APE) aqueous extracts were prepared using the ultrasound-assisted extraction method. Optimal extraction conditions for bioactive compounds (total polyphenols, flavonoids, anthocyanins, and flavan-3-ols, respectively) and antioxidant activity were determined using response surface methodology. Bioactive compounds rich SLE and APE were encapsulated in calcium alginate microparticles by the ionic gelation method. Physicochemical characteristics (morphology, size, encapsulation efficiency, loading capacity, and swelling) of microparticles showed very good properties with especially high encapsulation efficiency. Fitting to simple Korsmeyer–Peppa’s empirical model revealed that the underlying release mechanism of polyphenols is Fickian diffusion. SLE loaded microparticles showed very good pesticidal efficiency against Halyomorpha halys, especially on younger larval stages after both contact and digestive treatment. Microparticles loaded with APE did not achieve satisfactory digestive efficiency, but a certain toxic impact has been observed at contact application on all H. halys growth stages. Microparticles loaded with SLS exhibited prolonged insecticidal action against H. halys and could be a potential candidate as a green insecticide whose application could increase fruit growing safety.
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Govindan, Byju N., and William D. Hutchison. "Influence of Temperature on Age-Stage, Two-Sex Life Tables for a Minnesota-Acclimated Population of the Brown Marmorated Stink Bug (Halyomorpha halys)." Insects 11, no. 2 (February 7, 2020): 108. http://dx.doi.org/10.3390/insects11020108.
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Temperature is a critical single factor influencing insect population dynamics, and is foundational for improving our understanding of the phenology of invasive species adapting to new agroecosystems or in the process of range expansion. An age-stage, two-sex life table was therefore developed to analyze fundamental demographic features such as development, survival, and reproduction of a Minnesota-acclimated population of the invasive brown marmorated stink bug (Halyomorpha halys), in the north central USA. All salient life history parameters were estimated to better understand the population growth potential of H. halys at the current limit of its northern range in North America. We examined the effect of selected constant temperatures on immature development and survival (15–39 °C), adult reproduction and longevity (17–36 °C) of H. halys in the laboratory. The Minnesota population developed faster and survived at higher rates relative to a population that had previously established in Pennsylvania, USA. Mean generation time for the Minnesota population was minimized at 30 °C, while survival and fecundity were maximized at 27 and 23 °C, respectively. Given these findings, we assessed the effect of temperature on the intrinsic rate of increase ( r m ), the life table parameter that integrates the effects of temperature on development, survival, and reproduction. A Ratkowsky model predicted r m was maximized (0.0899) at 27.5 °C. We discuss the implications of our findings for understanding population growth rates for H. halys in the context of a warming climate, and potential to emerge as a serious crop pest in the Midwest U.S. region.
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Liu, Y. F., J. Li, Z. M. Zhang, X. H. Hu, and W. J. Zhang. "Experimental comparison of five friction models on the same test-bed of the micro stick-slip motion system." Mechanical Sciences 6, no. 1 (March 6, 2015): 15–28. http://dx.doi.org/10.5194/ms-6-15-2015.
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Abstract. The micro stick-slip motion systems, such as piezoelectric stick-slip actuators (PE-SSAs), can provide high resolution motions yet with a long motion range. In these systems, friction force plays an active role. Although numerous friction models have been developed for the control of micro motion systems, behaviors of these models in micro stick-slip motion systems are not well understood. This study (1) gives a survey of the basic friction models and (2) tests and compares 5 friction models in the literature, including Coulomb friction model, Stribeck friction model, Dahl model, LuGre model, and the elastoplastic friction model on the same test-bed (i.e. the PE-SSA system). The experiments and simulations were done and the reasons for the difference in the performance of these models were investigated. The study concluded that for the micro stick-slip motion system, (1) Stribeck model, Dahl model and LuGre model all work, but LuGre model has the best accuracy and (2) Coulomb friction model and the elastoplastic model does not work. The study provides contributions to motion control systems with friction, especially for micro stick-slip or step motion systems as well as general micro-motion systems.
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Kang, Y. J., J. H. Byun, and K. Y. Ki. "Contribution of Principal Components Based on the Broken-Stick Model." Korean Journal of Applied Statistics 23, no. 4 (August 31, 2010): 767–76. http://dx.doi.org/10.5351/kjas.2010.23.4.767.
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Martínez-Alvarado, Oscar, Florian Weidle, and Suzanne L. Gray. "Sting Jets in Simulations of a Real Cyclone by Two Mesoscale Models." Monthly Weather Review 138, no. 11 (November 1, 2010): 4054–75. http://dx.doi.org/10.1175/2010mwr3290.1.
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Abstract The existence of sting jets as a potential source of damaging surface winds during the passage of extratropical cyclones has recently been recognized. However, there are still very few published studies on the subject. Furthermore, although it is known that other models are capable of reproducing sting jets, in the published literature only one numerical model [the Met Office Unified Model (MetUM)] has been used to numerically analyze these phenomena. This article aims to improve our understanding of the processes that contribute to the development of sting jets and show that model differences affect the evolution of modeled sting jets. A sting jet event during the passage of a cyclone over the United Kingdom on 26 February 2002 has been simulated using two mesoscale models, namely the MetUM and the Consortium for Small Scale Modeling (COSMO) model, to compare their performance. Given the known critical importance of vertical resolution in the simulation of sting jets, the vertical resolution of both models has been enhanced with respect to their operational versions. Both simulations have been verified against surface measurements of maximum gusts, satellite imagery, and Met Office operational synoptic analyses, as well as operational analyses from the ECMWF. It is shown that both models are capable of reproducing sting jets with similar, though not identical, features. Through the comparison of the results from these two models, the relevance of physical mechanisms, such as evaporative cooling and the release of conditional symmetric instability, in the generation and evolution of sting jets is also discussed.
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Reandy, Brian, and Romirio Purba. "Jurnal Handayani." Jurnal Handayani 7, no. 1 (June 24, 2017): 38–45. http://dx.doi.org/10.24114/jh.v7i1.6573.
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Risnanda, Syan, Muhtarom Muhtarom, and Sutrisno Sutrisno. "Efektivitas Model Pembelajaran Kooperatif Tipe NHT dan Talking Stick Berbantu Prezi terhadap Prestasi Belajar Siswa." Media Penelitian Pendidikan : Jurnal Penelitian dalam Bidang Pendidikan dan Pengajaran 13, no. 1 (June 30, 2019): 97. http://dx.doi.org/10.26877/mpp.v13i1.5095.
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Student learning achievement in mathematics lessons and using learning models are still low and not in accordance with the material. The use of models in learning must be adapted to the material to achieve satisfactory student achievement. This type of research is quantitative and aims to determine the effectiveness of learning using the Taking Stick model and Prezi's NHT assisted model on student learning achievement. The population of this research is class VII students of SMP Negeri 29 Semarang in the academic year 2017/2018. Sampling using cluster random sampling technique so that three classes were obtained randomly, namely VII A, VII B, and VII C. The design of this study was the Posttest Only Control Design. Data obtained through multiple choice test results were then processed by ANAVA test, Sceffe Test, learning completeness test and simple linear regression test. Data analysis results show that (1) there are differences in student achievement using Prezi-assisted Taking Stick learning models, Prezi-assisted NHT learning models and conventional learning models. (2) Students' learning achievement using Prezi-assisted Taking Stick models is better than conventional learning models. (3) Learning achievement of students who use Prezi-assisted NHT models is better than conventional learning models. (4) Learning achievements of students who use the Taking Stick model and Prezi-assisted NHT achieve KKM. (5) There is a correlation between student activity and learning achievement for classes that receive Prezi Talking Stick learning model and classes that receive Prezi's NHT assisted learning model.
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Barrowman, Nicholas J., and Ransom A. Myers. "Still more spawner-recruitment curves: the hockey stick and its generalizations." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 4 (April 1, 2000): 665–76. http://dx.doi.org/10.1139/f99-282.
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Estimation of maximum reproductive rate using spawner-recruitment models involves extrapolating survival for very low spawner abundance. Existing spawner-recruitment curves often lead to biologically unreasonable extrapolations or are unable to model nondecreasing spawner-recruitment data adequately. One alternative is a piecewise linear spawner-recruitment model known as the hockey stick. We compare the fit of the Beverton-Holt with the hockey stick for 246 spawner-recruitment data sets. We show that the Beverton-Holt usually estimates a larger carrying capacity of recruits and a larger maximum reproductive rate than the hockey stick. We propose two families of generalizations of the hockey stick, one with a simple interpretation and one that is more complex but smoother. These generalized hockey sticks are more biologically plausible, less subject to numerical difficulties, and of greater utility in metaanalytic models than the hockey stick.
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Su, Meng, Chun Ting Liu, and Wan Shan Zhang. "Finite Element Modal Analyses of the WK-10B Excavator Stick." Advanced Materials Research 619 (December 2012): 39–42. http://dx.doi.org/10.4028/www.scientific.net/amr.619.39.
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To analysis the fracture mechanism and breaking location of the stick. By using ANSYS software to establish the model of excavator stick, and focus on analyzing the force changes of excavator stick in largest excavating force. By the modal analysis and transient dynamic analysis, stick stress and deformation distribution are obtained, further poses that reasonable to add the ribs, appropriate to strengthen cover thickness and the welding process of the stick will help prevent cracks. The results provide a reliable theoretical basis to improve the life of stick.
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Fajrin, Oktaviastuti Awalia. "Pengaruh Model Talking Stick terhadap Hasil Belajar IPS Siswa SD." Jurnal Bidang Pendidikan Dasar 2, no. 1A (April 25, 2018): 85–91. http://dx.doi.org/10.21067/jbpd.v2i1a.2353.
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Penelitian ini bertujuan untuk mengetahui peningkatan hasil belajar IPS siswa Sekolah Dasar. Model Talking Stick dapat melatih peserta didik untuk berpikir kritis, mengajarkan peserta didik untuk memahami materi pelajaran dengan cepat, melatih siswa agar giat belajar, melatih siswa untuk bertanya dan mengungkapkan pendapat. Selain itu dengan menggunakan model Talking Stick pembelajaran menjadi lebih menyenangkan, sehingga hasil belajar peserta didik terutama pada mata pelajaran IPS menjadi optimal atau meningkat. Penelitian ini menggunakan metode studi dokumen atas hasil penelitian sebelumnya atau disebut dengan metaanalisis. Penelususran data dilakukan melalui Google Cendekia dan diperoleh 10 jurnal terpublikasi. Hasil penelitian menunjukkan bahwa dengan menggunakan model pembelajaran Talking Stick efektif untuk meningkatkan hasil belajar peserta didik khususnya pada siswa Sekolah Dasar. Hasil belajar pada mata pelajaran IPS dengan menggunakan model Talking Stick mengalami peningkatan jika dibandingkan dengan model pembelajaran konvensional. Jika dengan model Talking Stick masih kurang meningkatkan hasil belajar peserta didik, maka solusi yang lain adalah guru dapat menyesuaikan model pembelajaran yang ada dengan kondisi dan kebutuhan peserta didik.
This study aims to determine the increase in learning outcomes of primary school students. The Talking Stick model can train learners to think critically, teach students to understand the subject matter quickly, train students to study hard, train students to ask questions and express opinions. In addition, by using the Talking Stick model of learning becomes more fun, so the learning outcomes of learners, especially on IPS subjects to be optimal or increased. Is the Talking Stick model effective for improving learners' learning outcomes on social studies subjects? This research used document study method of previous research result or called metaanalysis. Data search is done through Google Scholar and obtained 10 published journals. The results showed that by using Talking Stick learning model is effective to improve learning outcomes of students especially in elementary school students. The learning outcomes in IPS subjects using the Talking Stick model have improved when compared with conventional learning models. If the Talking Stick model is still less improve the learners' learning outcomes, then the other solution is the teacher can adjust the existing learning model to the conditions and needs of learners.
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Seidel, E. J., J. B. Pazini, V. L. D. Tomazella, A. M. C. Vieira, F. F. Silva, J. F. S. Martins, and J. A. F. Barrigossi. "Predicting Rice Stem Stink Bug Population Dynamics Based on GAMLSS Models." Environmental Entomology 49, no. 5 (September 19, 2020): 1145–54. http://dx.doi.org/10.1093/ee/nvaa091.
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Abstract The rice stem stink bug, Tibraca limbativentris Stål (Hemiptera: Pentatomidae), is one of the most harmful insects for Brazilian rice fields. Aiming to define the most appropriate time and place for pest management measures in commercial paddy fields, we adjusted regression models (Poisson, Zero Inflated Poisson, reparametrized Zero Inflated Poisson, Negative Binomial and Zero Inflated Negative Binomial) for modeling the population variation of T. limbativentris along the phenological cycle of the flooded rice cultivation. We hypothesize that the rice stem stink bug population’s size is influenced by the rice cycle (time) and geographical positions within the crop. It was possible to predict the occurrence of the rice stem stink bug in the commercial flooded rice crop. The population of the rice stem stink bug increased significantly with the time or phenological evolution of rice. Our results indicated that the start of T. limbativentris monitoring should occur up to 45 d After Plant Emergence (DAE), from the regions along the edges of the rice paddies, which are the points of entry and higher concentration of the insect. In addition, 45 and 60 DAE were considered the crucial times for T. limbativentris control decision making in flooded rice paddies.
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Liang, Jin-Wei, and Brian F. Feeny. "Wavelet Analysis of Stick-Slip Signals in Oscillators With Dry-Friction Contact." Journal of Vibration and Acoustics 127, no. 2 (June 22, 2004): 139–43. http://dx.doi.org/10.1115/1.1891819.
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Wavelet transforms were compared between various simulated friction models and real stick-slip data. While simulations of several models produced stick-slip transition oscillations seen in the real data, the wavelet features of the compliant contact model with light damping best captured the characteristics of the experimental signal. The wavelet contours were also used to estimate the contact stiffness.
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Syafi’i, Mohamad, and Kiki Fatmalawati. "PERBEDAAN HASIL BELAJAR MATEMATIKA SISWA MENGGUNAKAN MODEL PEMBELAJARAN SNOWBALL THROWING DAN MODEL TALKING STICK." Pi: Mathematics Education Journal 1, no. 3 (October 30, 2018): 100–107. http://dx.doi.org/10.21067/pmej.v1i3.2782.
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Penelitian ini dilakukan untuk mengetahui ada tidaknya perbedaan hasil belajar matematika dengan menggunakan model pembelajaran Snowball Throwing dan model pembelajaran Talking Stick. Model pembelajaran Snowball Throwing merupakan model pembelajaran yang melibatkan siswa aktif dalam proses pembelajaran dengan kegiatan memberikan pertanyaan kepada siswa lain dengan cara melempar bola kertas. Model pembelajaran Talking Stick merupakan model pembelajaran dengan media tongkat, siapa yang memegang tongkat wajib menjawab pertanyaan yang diberikan oleh guru. Penelitian ini dilakukan di SMA Asyariah Gintung, Tangerang pada bulan Maret sampai April 2017. Berdasarkan hasil penelitian, rata-rata hasil belajar matematika menggunakan model Snowball Throwing adalah 80,1 sedangkan rata-rata hasil belajar matematika menggunakan model Talking Stick adalah 60,83. Dalam penelitian komparasional ini, pengujian hipotesis statistik menggunakan uji – t. Hasil analisis data uji beda dua rata – rata hasil belajar matematika menggunakan uji – t diperoleh thitung = 6.712 dan ttabel = 2.002 dengan dk = 58 dan a = 0.05 Berdasarkan hasil tersebut dapat disimpulkan bahwa thitung > ttabel yang artinya terdapat perbedaan hasil belajar matematika siswa dengan menggunakan model pembelajaran Snowball Throwing dan model pembelajaran Talking Stick.
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Zhong, Bo Wen, Zhen Hua Wang, Zi Qi Jin, and Li Ning Sun. "The Study on the Effect of Driving Parameters on the Movement of the Stick-Slip Driving Stage." Key Engineering Materials 620 (August 2014): 212–19. http://dx.doi.org/10.4028/www.scientific.net/kem.620.212.
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In this paper, the relationship of the driving parameters and the movement of stick-slip driving was studied. Firstly, the research status and the principle of stick-slip driving was introduced. Secondly, the math model of the every step displacement and velocity of stick-slip driving was built. By using mathematical models, the relationship curve of the every step displacement and the step time was received through the simulation in Matlab software. Furthermore, in corroboration of the math model, the prototype was designed and the experiment system was built. From the testing of stick-slip prototype, the step displacement in every step time was tested 20 times and the relationship curve of the average every step displacement and step time was obtained. The simulation results are validated by the testing results and the method of reducing the time step to adjust the stick-slip driving step displacement and velocity were proved. In the future, a greater drive power should be researched for improving the movement performance of the stick-slip driving.
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Brochard-Wyart, F., and P. G. de Gennes. "Naive model for stick-slip processes." European Physical Journal E 23, no. 4 (August 2007): 439–44. http://dx.doi.org/10.1140/epje/i2007-10215-3.
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Purba, Ika Rosenta. "Talking Stick Learning Model Test on Biology Students Cognitive Learning Outcomes." International Journal of Educational Research & Social Sciences 2, no. 1 (April 7, 2021): 86–91. http://dx.doi.org/10.51601/ijersc.v2i1.33.
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The talking stick learning model is a learning model that allows students to be active and creative so that Students cognitive learning outcomes can be achieved. This learning model basically uses the help of a stick, but in practice it can be combined with appropriate learning media. In this case, the researcher only used the stick as a test of the talking stick learning model on Studentscognitive learning outcomes. The method of testing this model used a quasi-experimental design with a One-group pretest-posttest design with 3 trials. The results of the research proved that the second (71.56) and third (78.44) experiments have reached the KKM (> 70). This proves that the talking stick learning model can improve Students cognitive biology learning outcomes.
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Karachevtseva, Iuliia, Arcady V. Dyskin, and Elena Pasternak. "Generation and propagation of stick-slip waves over a fault with rate-independent friction." Nonlinear Processes in Geophysics 24, no. 3 (July 11, 2017): 343–49. http://dx.doi.org/10.5194/npg-24-343-2017.
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Abstract. Stick-slip sliding is observed at various scales in fault sliding and the accompanied seismic events. It is conventionally assumed that the mechanism of stick-slip over geo-materials lies in the rate dependence of friction. However, the movement resembling the stick-slip could be associated with elastic oscillations of the rock around the fault, which occurs irrespective of the rate properties of the friction. In order to investigate this mechanism, two simple models are considered in this paper: a mass-spring model of self-maintaining oscillations and a one-dimensional (1-D) model of wave propagation through an infinite elastic rod. The rod slides with friction over a stiff base. The sliding is resisted by elastic shear springs. The results show that the frictional sliding in the mass-spring model generates oscillations that resemble the stick-slip motion. Furthermore, it was observed that the stick-slip-like motion occurs even when the frictional coefficient is constant. The 1-D wave propagation model predicts that despite the presence of shear springs the frictional sliding waves move with the P wave velocity, denoting the wave as intersonic. It was also observed that the amplitude of sliding is decreased with time. This effect might provide an explanation to the observed intersonic rupture propagation over faults.
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Nkosi, Thobile, and Lindelani Mnguni. "THE IMPACT OF PHYSICAL MOLECULAR MODELS ON STUDENTS' VISUO-SEMIOTIC REASONING SKILLS RELATED TO THE LEWIS STRUCTURE AND BALL & STICK MODEL OF AMMONIA." Journal of Baltic Science Education 19, no. 4 (August 10, 2020): 594–604. http://dx.doi.org/10.33225/jbse/20.19.594.
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Visuo-semiotic models, such as Lewis structures and ball & stick models, are widely used to enhance students’ learning. However, there is limited research about the impact of these models on specific visuo-semiotic reasoning skills. In the current research, we aimed to determine the extent to which physical molecular models could enhance specific visuo-semiotic reasoning skills among students. The research question that we explored was, “what is the impact of physical molecular models on Grade 11 students’ visuo-semiotic reasoning skills related to Lewis structures and ball & stick models of ammonia?” In this mixed-methods research, we collected data from purposively selected Grade 11 chemistry students aged between 15 and 18 from an under-resourced school in South Africa. Through a quasi-experimental design, participants in the experimental group (n = 101) used physical molecular models to learn about Lewis structure and ball & stick models of ammonia while participants in the control group (n = 100) did not. We subsequently tested students' visuo-semiotic reasoning skills. Results show that using physical molecular models significantly improved students' visuo-semiotic reasoning skills and reduced associated learning difficulties. We, therefore, recommend that these models should be used as an instructional tool to enhance learning. Keywords: ball & stick models, Lewis structures, physical models, visuo-semiotic reasoning.
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Nagara, Bunga Oktaveanry, Lelly Qodariah, and Jumardi Jumardi. "Pengaruh Model Pembelajaran Talking Stick Terhadap Hasil Belajar Peserta Didik Pada Mata Pelajaran Sejarah Kelas X di SMK Grafika Yayasan Lektur." Jurnal Pattingalloang 7, no. 1 (April 1, 2020): 58. http://dx.doi.org/10.26858/pattingalloang.v7i1.13292.
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Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran talking stick terhadap hasil belajar peserta didik pada mata pelajaran sejarah kelas X di SMK Grafika Yayasan Lektur. Metode penelitian yang digunakan adalah metode penelitian kuantitatif eksperimen. Sampel yang digunakan dalam penelitian ini yaitu kelas XA sebagai kelas eksperimen dan kelas XB sebagai kelas kontrol. Pada uji validitas instrumen menggunakan korelasi biserial dengan 25 butir soal pilihan ganda dengan 15 butir soal valid an 10 butir soal yang tidak valid. Teknik analisis data yang digunakan adalah uji normalitas, uji homogenitas dan uji hipotesis menggunakan uji t. Hasil penelitian menunjukkan bahwa: (1) terdapat perbedaan hasil belajar yang diberi perlakuan menggunakan model pembelajaran talking stick lebih tinggi daripada hasil belajar yang diberi perlakuan menggunakan model pembelajaran konvensional, dari analisis data diperoleh rata-rata kelas eksperimen 87,16 dan kelas kontrol 66,85, (2) hasil pengujian hipotesis yang diperoleh thitung>ttabel yaitu 2,107>2,002 pada taraf signifikan α=0,05. Hal tersebut berarti hipotesis dalam penelitian ini dapat diterima dan dinyatakan bahwa terdapat pengaruh model pembelajaran talking stick terhadap hasil belajar peserta didik pada mata pelajaran sejarah kelas X di SMK Grafika Yayasan Lektur. Kesimpulannya bahwa terdapat pengaruh dari model pembelajaran talking stick terhadap hasil belajar peserta didik pada mata pelajaran sejarah kelas X di SMK Grafika Yayasan Lektur.Kata kunci: model pembelajaran talking stick, hasil belajar AbstractThis study aims to determine the effect of the talking stick learning model on student learning outcomes in class X history subjects at the SMK Grafika Foundation for Literature. The research method used was an experimental quantitative research method. The sample used in this study is class XA as an experimental class and class XB as a control class. In the validity test the instrument uses biserial correlation with 25 multiple choice questions with 15 valid items and 10 invalid items. Data analysis techniques used were normality test, homogeneity test and hypothesis testing using t test. The results showed that: (1) there were differences in learning outcomes that were treated using the talking stick learning model higher than learning outcomes that were treated using conventional learning models, from the analysis of the data obtained an experimental class average of 87.16 and a control class 66, 85, (2) the results of testing the hypothesis obtained tcount> ttable is 2.107> 2.002 at a significant level α = 0.05. This means that the hypothesis in this study can be accepted and it is stated that there is an effect of the talking stick learning model on student learning outcomes in class X history subjects at SMK Grafika Literature Foundation. The conclusion that there is an influence of the talking stick learning model on student learning outcomes in classs X history subjects at SMK Grafika Literature Foundation.Keywords: talking stick learning model, learning outcomes
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Wang, Baojin, Zhongyang Wang, and Fushen Ren. "Dynamic Model and Quantitative Analysis of Stick-Slip Vibration in Horizontal Well." Shock and Vibration 2020 (July 22, 2020): 1–14. http://dx.doi.org/10.1155/2020/8831111.
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Stick-slip is very harmful to the service life of drillstring. The extended Hamilton principle is applied in the paper. Then, finite element method (FEM) is employed to describe the model. The drillstring-borehole impact and friction, fluid-structure interaction, bit-rock interaction, and gravity are considered in this model. The influence of axial and torsional excitation on stick-slip is analyzed. The nonlinear motion predicted by the model is consistent with the observation results in the experiments. The research shows that the fluctuation amplitude of the bit angular velocity also increases along with the increase of driving angular velocity (torsional excitation). However, both the ratio of the maximum angular velocity of the stick-slip vibration and the fluctuation of the angular velocity are continuously reduced. Meanwhile, the strength of the stick-slip vibration has a tendency to slow down. As the axial load (axial excitation) increases, the fluctuation of the maximum angular speed of the stick-slip vibration does not change significantly, but the smaller load causes a smaller stick duration.
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Sakinatun, Sakinatun, Muhammad Hamdani, and Dedy Setyawan. "Upaya Meningkatkan Hasil Belajar IPA dengan menggunakan Model Example non Exmple dan Model Talking Stick pada Peserta Didik Kelas IV-A SDN 3 Langkai Palangka Raya 2016/2017." Tunas: Jurnal Pendidikan Guru Sekolah Dasar 3, no. 1 (December 13, 2017): 15–20. http://dx.doi.org/10.33084/tunas.v3i1.583.
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This study aims to: (1) Know how the activities of students during the learning process using the Example NonExample model and the Talking Stick Model. (2) Knowing whether there is an increase in student learning outcomes in science learning using the learning model Example NonExample and the Talking Stick Model. This research was conducted in the 1st week of April 2017 located at SDN-3 Langkai Palangka Raya, Jalan Temanggung Tandang Raya. This type of analysis is Classroom Action Research (CAR) with research subjects all IVA class students of Palangka Raya SDN-3 with 23 students, 13 men, ten women. Data collection techniques in this study used observations and tests. The data analysis techniques used qualitative and quantitative data analysis. The results of this study indicate that: (1) The activities of students both during science learning using the Example Non Example model and the Talking Stick model are shown by the acquisition of the results of observations, namely in the first cycle the total score is 91 with an average value of 3.64 and at cycle II the number of counts reached 95.5 with an average value of 3.82. (2) The use of Example Non Example learning models and Talking Stick models can improve student learning outcomes as indicated by the acquisition of an average value of 74.35 in the first cycle increased to 90.65 in the second cycle. Classical learning completeness also improved with an amount of 65.21% in the first cycle increased to 95.65% in the second cycle.
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Cha, Kyunghwan, Namgyun Kim, and Sungho Ko. "Belly Sting Model Support Interference Effect of NASA Common Research Model at Low Speed Wind Tunnel." Journal of the Korean Society for Aeronautical & Space Sciences 49, no. 3 (March 31, 2021): 167–74. http://dx.doi.org/10.5139/jksas.2021.49.3.167.
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Munifah, Munifah. "PERBANDINGAN MODEL PEMBELAJARAN KOOPERATI TIPE TALKING STICK (TONGKAT BERBICARA) DENGAN MODEL PEMBELAJARAN KOOPERATIF TIPE JIGSAW TERHADAP PRESTASI BELAJAR." APOTEMA : Jurnal Program Studi Pendidikan Matematika 2, no. 2 (July 15, 2016): 52–61. http://dx.doi.org/10.31597/ja.v2i2.117.
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Model pembelajaran Talking Stick merupakan suatu modelpembelajaran yang menggunakan alat yaitu tongkat, apabila tongkat dipegang salah satu dari anggota dari suatu kelompok maka kelompoktersebut harus menjawab pertanyaan dari guru. Model pembelajarankooperatif tipe Jigsaw merupakan model pembelajaran kooperatif yangmembentuk kelompok heterogen dengan 2 tim yaitu tim asal dan timahli. Dengan belajar secara kooperatif, diharapkan prestasi belajar siswadapat meningkat. Penelitian ini bertujuan untuk mengetahuibagaimanakah perbandingan model pembelajaran kooperatif tipeTalking Stick dengan model pembelajaran kooperatif tipe Jigsawterhadap prestasi belajar siswa kelas VII SMPN 07 Bangkalan padamateri pecahan. Jenis penelitian ini adalah eksperimen dengan datakuantitatif, sedangkan populasi dalam penelitian ini adalah seluruhsiswa kelas VII SMPN 07 Bangkalan. Sebagai sampel terpilih kelasVII-A dan VII-B dengan ketentuan bahwa kelas VII-A sebagai kelaseksperimen (model pembelajaran kooperatif tipe Talking Stick)sedangkan kelas VII-B sebagai kelas kontrol (model pembelajarankooperatif tipe Jigsaw). Metode pengumpulan data yang digunakanadalah dengan metode tes. Dari hasil data yang diperoleh dan dianalisisdiketahui bahwa kedua sampel berasal dari kelas berdistribusi normaldengan varians homogen. Selanjutnya dengan uji-t diperoleh nilai thitung= 0,352 dan t1-α = 1,684 sehingga thitung t1-α sehingga dapatdisimpulkan prestasi belajar siswa pada kelas model pembelajarankooperatif tipe Talking Stick lebih baik dari pada kelas modelpembelajaran kooperatif tipe Jigsaw.
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Margolis, D. "Fixed causality slip-stick friction models for use in simulation of non-linear systems." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 219, no. 3 (May 1, 2005): 199–206. http://dx.doi.org/10.1243/095965105x9579.
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Slip-stick friction occurs when the relative velocity between sliding surfaces approaches zero and the surfaces become ‘stuck’, requiring a force larger than the sliding friction force to break the surfaces loose, allowing sliding to resume. Mathematically, these physics are an example of ‘ideal switching’ where the velocity is zero and the force is determined by other parts of the system, or the force is set by the friction model (and could be zero), and the velocity is determined by other parts of the system. A switch in an electric circuit is another example. Including ideal switches in an overall physical system model is complicated by the inversion of causality when the switch occurs. In one state the velocity is prescribed and the force is determined, and in the other state the force is prescribed and the velocity is determined. Such causal inversions create formulation and computational problems, and these problems can be quite prohibitive if many switches are part of the model. This paper presents fixed causal models for slip-stick friction that allow a single state space model to be used regardless of the number of switches. Such a development allows simulation of multiple plate brakes and clutches, or ideal rectifiers, using an explicit first-order state space representation. It should be noted that there has been extensive work in the development of models that represent the physics of friction. One such model is the LuGre model [1] where microstructural displacements are modelled. Our intent here is not to extend the physics of slip-stick friction, but rather to reasonably represent the physics while providing a computationally convenient method for including slip-stick friction in overall system models.
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Meng, Dejian, Lijun Zhang, Xiaotian Xu, Yousef Sardahi, and Gang S. Chen. "Sensing and Quantifying a New Mechanism for Vehicle Brake Creep Groan." Shock and Vibration 2019 (February 26, 2019): 1–10. http://dx.doi.org/10.1155/2019/1843205.
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This paper investigates the creep groan of a vehicle’s brake experimentally, analytically, and numerically. Experimentally, the effects of acceleration on caliper and strut, noise, brake pressure, and tension are measured. The results show that the measured signals and their relevant spectra broadly capture the complex vibrations of creep groan. This includes the simple stick-slip, severe stick-slip vibrations/resonances, multiple harmonics, half-order harmonics; stick-slip-induced impulsive vibrations, steady/unstable vibrations, and their transitions. Analytically, a new mathematical model is presented to capture the unique features of half-order harmonics and the connections to fundamental stick-slip/resonant frequency and multiple harmonics. The analytical solution and the experimental results show that the vibro-impact of the brake pad-disc system can be triggered by severe stick-slip vibrations and is associated with instable, impulsive stick-slip vibration with wideband. The induced stick-slip vibro-impact can evolve into a steady and strong state with half-order, stick-slip fundamental, and multiple-order components. This new mechanism is different from all previously proposed mechanisms of creep groan in that we also view some type of creep groan as a stick-slip vibration-induced vibro-impact phenomenon in addition to conventional stick-slip phenomena. The new mechanism comprehensively explains the complex experimental phenomena reported in the literature. Numerically, the salient features of phase diagrams of instable stick-slip and vibro-impact are examined by using a seven-degree-of-freedom brake system model, which shows that the phase diagrams of the dynamics of creep groan with and without vibro-impact are substantially different. The phase diagram of the dynamics with vibro-impact is closer to the experimental results. In contrast to existing mechanisms, the proposed new mechanism encompasses the instable stick-slip nature of creep groan and elaborates the inherent connections and transition of the spectrogram. The new knowledge can be used to attain critical improvements to brake noise and vibration analysis and design. By applying the proposed new model in addition to existing models, all experimental phenomena in creep groan are elaborated and quantified.
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Papinska, Joanna, Harini Bagavant, Grzegorz B. Gmyrek, and Umesh S. Deshmukh. "Pulmonary Involvement in a Mouse Model of Sjögren’s Syndrome Induced by STING Activation." International Journal of Molecular Sciences 21, no. 12 (June 25, 2020): 4512. http://dx.doi.org/10.3390/ijms21124512.
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Sjögren’s Syndrome (SS), a chronic autoimmune disorder affecting multiple organ systems, is characterized by an elevated type I interferon (IFN) response. Activation of Stimulator of Interferon Genes (STING) protein induces type I IFN and in mice, several features of SS, including anti-nuclear antibodies, sialadenitis, and salivary gland dysfunction. Since lung involvement occurs in one-fifth of SS patients, we investigated whether systemic activation of STING also leads to lung inflammation. Lungs from female C57BL/6 mice injected with the STING agonist 5, 6-Dimethylxanthenone-4-acetic acid (DMXAA), were evaluated for acute and chronic inflammatory responses. Within 4h of DMXAA injection, the expression of Ifnb1, Il6, Tnf, Ifng, and Mx1 was significantly upregulated. At 1 and 2 months post-treatment, lungs showed lymphocytic infiltration in the peri-bronchial regions. The lungs from DMXAA treated mice showed an increased expression of multiple chemokines and an increase in lymphatic endothelial cells. Despite STING expression in bronchial epithelium and cells lining the alveolar wall, bone marrow chimeras between STING knockout and wild type mice showed that STING expression in hematopoietic cells was critical for lung inflammation. Our results suggest that activation of the STING pathway might be involved in SS patients with concomitant salivary gland and lung disease.
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Lo, Christine, Siddharth Arora, Yoav Ben-Shlomo, Thomas R. Barber, Michael Lawton, Johannes C. Klein, Sofia Kanavou, et al. "Olfactory Testing in Parkinson Disease and REM Behavior Disorder." Neurology 96, no. 15 (February 24, 2021): e2016-e2027. http://dx.doi.org/10.1212/wnl.0000000000011743.
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ObjectiveWe sought to identify an abbreviated test of impaired olfaction amenable for use in busy clinical environments in prodromal (isolated REM sleep behavior disorder [iRBD]) and manifest Parkinson disease (PD).MethodsEight hundred ninety individuals with PD and 313 controls in the Discovery cohort study underwent Sniffin’ Stick odor identification assessment. Random forests were initially trained to distinguish individuals with poor (functional anosmia/hyposmia) and good (normosmia/super-smeller) smell ability using all 16 Sniffin’ Sticks. Models were retrained using the top 3 sticks ranked by order of predictor importance. One randomly selected 3-stick model was tested in a second independent PD dataset (n = 452) and in 2 iRBD datasets (Discovery n = 241, Marburg n = 37) before being compared to previously described abbreviated Sniffin’ Stick combinations.ResultsIn differentiating poor from good smell ability, the overall area under the curve (AUC) value associated with the top 3 sticks (anise/licorice/banana) was 0.95 in the Development dataset (sensitivity 90%, specificity 92%, positive predictive value 92%, negative predictive value 90%). Internal and external validation confirmed AUCs ≥0.90. The combination of the 3-stick model determined poor smell, and an RBD screening questionnaire score of ≥5 separated those with iRBD from controls with a sensitivity, specificity, positive predictive value, and negative predictive value of 65%, 100%, 100%, and 30%.ConclusionsOur 3-Sniffin’-Stick model holds potential utility as a brief screening test in the stratification of individuals with PD and iRBD according to olfactory dysfunction.Classification of EvidenceThis study provides Class III evidence that a 3-Sniffin’-Stick model distinguishes individuals with poor and good smell ability and can be used to screen for individuals with iRBD.
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Hernawati, Ai Rustini. "PENGGUNAAN MODEL TALKING STICK UNTUK MENINGKATKAN HASIL BELAJAR SISWA DALAM MEMBACA ARTIKEL." Jurnal Wahana Pendidikan 6, no. 2 (December 6, 2019): 93. http://dx.doi.org/10.25157/wa.v6i2.3049.
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Kompetensi siswa yang ditingkatkan melalui Penelitian Tindakan Kelas ini adalah membaca artikel dengan menggunakan model pembelajaran Talking Stick sehingga diharapkan adanya peningkatan hasil belajar siswa. Tujuan penelitian ini adalah untuk Mengetahui penggunaan model pembelajaran Talking Stick dalam meningkatkan hasil belajar siswa dalam membaca artikel. Penelitian ini menggunakan metode Penelitian Tindakan Kelas (PTK) dengan melakukan 2 (dua) siklus tindakan, yang pada setiap siklus dilakukan melalui tahapan perencanaan, pelaksanaan, observasi, dan refleksi.Teknik pengumpulan data dalam penelitian tindakan kelas ini terdapat empat teknik yaitu pengamatan, tes, dokumentasi, dan angket. Hasil penelitian ini menunjukkan bahwa Penggunaan model pembelajaran Talking Stick terbukti dapat meningkatkan aktifitas siswa dalam belajar. Hal ini dibuktikan dengan adanya peningkatan aktifitas siswa dari prasiklus ke siklus 1 sebesar 33,34 atau meningkat sebesar 28,55% dan dari siklus 1 ke siklus 2 meningkat sebesar 13,67 atau meningkat sebesar 11,39 %.Terdapat peningkatan proses belajar menggunakan model pembelajaran Talking Stick dari prasiklus ke siklus 1 sebesar 0,8 atau meningkat sebesar 20,5 % dan peningkatan dari siklus 1 ke siklus 2 sebesar 0,78 atau meningkat sebesar 19,5 %. Terjadi peningkatan pada rata-rata nilai tes dari prasiklus ke siklus 1 pertemuan ke 1 sebesar 14,67 atau meningkat sebesar 22.56 % dan meningkat pada persentase siswa yang tuntas sebesar 40 %. Dari siklus 1 ke siklus 2 terjadi peningkatan rata-rata nilai sebesar 3,6 atau meningkat sebesar 3,2 %.Penggunaan model pembelajaran Talking Stick dapat meningkatkan hasil belajar siswa kelas IX-H SMP Negeri 3 Tasikmalaya dalam membaca artikel.Pada umumnya siswa merespon dengan baik penggunaan model pembelajaran Talking Stick Kata Kunci: Hasil Belajar, Membaca Artikel, Model Pembelajaran, Talking Stick
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Hovda, Sigve. "Multi-dimensional semi-analytical model for axial stick–slip of a rod sliding on a surface with Coulomb friction." Advances in Mechanical Engineering 11, no. 3 (March 2019): 168781401983153. http://dx.doi.org/10.1177/1687814019831533.
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A multi-dimensional lumped element model of a long non-rotating rod that moves on a slick surface with both dynamic and static Coulomb friction is outlined. The rod is accelerated to a constant velocity, and the free end of the rod experiences the effect of stick and slip. This article describes a new modeling approach, where the model is able to switch between different linear semi-analytical sub-models, depending on how much of the rod is moving. Fundamental understanding of the stick–slip effect is revealed, and a potential shortcoming of the model is also discussed. The model is computationally effective and may be suitable for real-time applications in, for instance, oil-well drilling.
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Liu, Feng Jun, Lei Xie, He Hua Zhu, and Ning Yu. "3-D Numerical Analysis on Performance of Prestressed and Precast Concrete Segment Joint." Advanced Materials Research 255-260 (May 2011): 1853–56. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1853.
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The rotational angle of joint is the key factor for segment lining design. Using the nonlinear finite element program of MARC (MSC2003), the 3D numerical analysis on segment joint of prestressed concrete lining has been carried out. During the analysis, Coulomb and Stick-slip friction models were used as the friction type between the concrete and the prestressing steel strands. The selection of friction model used in the numerical analysis is very important. The study showed that the Stick-slip friction model is more suitable than Coulomb friction model for analysis of the P&PCSL joint. The value of friction coefficient should be thought over carefully.
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Pour, Agustina Novitasari, Lovy Herayanti, and Baiq Azmi Sukroyanti. "Pengaruh Model Pembelajaran Talking Stick terhadap Keaktifan Belajar Siswa." Jurnal Penelitian dan Pengkajian Ilmu Pendidikan: e-Saintika 2, no. 1 (December 31, 2018): 36. http://dx.doi.org/10.36312/e-saintika.v2i1.111.
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[Title: The Effect of a Talking Stick Learning Model on Student Learning Activities]. A fun learning environment, active and meaningful for students need to be created by applying active learning model for students that learning model talking stick. This type of research is quasi-experimental. This research aimed to know there is or no effect of talking stick learning model toward students learning activeness. This research implemented in class VIII SMP Negeri 5 Mataram in academic year 2015/2016 from March to April 2016. The technique of sample using cluster random sampling, in order to obtain first-class VIII I totalling 30 students as an experimental class and class VIII E totalling 30 students as the control class. The results of this research are students activeness learning showed by using the instrument is activeness of student learning questionnaire. Based on data analysis showed that t-test was 8.28 and t- table was 2.000 (df = 58). So, t-test > t-table (8.28 > 2.000). This means that there is an effect of talking stick learning model toward students learning activeness.
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Zhang, Huidong, Xinqun Zhu, Zhongxian Li, and Shu Yao. "Displacement-dependent nonlinear damping model in steel buildings with bolted joints." Advances in Structural Engineering 22, no. 5 (October 8, 2018): 1049–61. http://dx.doi.org/10.1177/1369433218804321.
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The stick–slip phenomenon is commonly found at structural connections in steel buildings. It is a major damping mechanism in a structure with bolted joints and makes a significant contribution to the total structural damping. This article reviews the stick–slip damping model of an elastic single-degree-of-freedom system with one stick–slip component. It is observed that the damping ratios of the system with the stick–slip mechanism first quickly increase when experiencing a very small displacement and then slowly decrease. After the number of activated slip surfaces is assumed to be a linear function related to the structural displacement, the equivalent damping ratios of a structural system with numerous stick–slip components are derived. However, this displacement-dependent damping model is very difficult to be used for a structural dynamic analysis due to its inherent complexity. Therefore, a new displacement-dependent damping model for a structural dynamic analysis is proposed based on the viscous damping. A high-rise steel moment resisting frame with bolted joints subjected to an earthquake ground motion is taken as an example to verify the proposed method.
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M., Noviyanti. "PENINGKATAN HASIL BELAJAR SISWA TENTANG PENGOLAHAN DATA MELALUI MODEL TALKING STICK." Journal of Mathematics Science and Education 2, no. 2 (June 29, 2020): 96–104. http://dx.doi.org/10.31540/jmse.v2i2.210.
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This study entitled "improving student learning about the results of processing of Data Through the Model of the Talking Stick".The problem in this research is "How does the Talking Stick learning model can improve the learning results of students in learning mathematics?".The purpose of this research is to find out how the learning model talking stick can improve student learning outcomes.As well as your long-term goal is this model can motivate students in learning and improving the results of his studies.This research uses research class. The method used is a Model of the Talking Stick.Its population is a whole grade VI SDN 51 Lubuklinggau Year Lesson 2018/2019 of 27 students.Data collection techniques to techniques and tests can be concluded that the results of the study on the Data processing through the model of the Talking Stick can be increased.
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Tóth, Tibor I., and Silvia Daun. "A kinematic model of stick‐insect walking." Physiological Reports 7, no. 8 (April 2019): e14080. http://dx.doi.org/10.14814/phy2.14080.
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Sato, Katsuhiko. "Analysis of a Statistical Stick-Slip Model." Progress of Theoretical Physics 102, no. 1 (July 1999): 37–50. http://dx.doi.org/10.1143/ptp.102.37.
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Wilkinson, M., B. Mehlig, and V. Bezuglyy. "Stick-breaking model for variable-range hopping." Philosophical Magazine Letters 88, no. 5 (May 2008): 327–34. http://dx.doi.org/10.1080/09500830801971462.
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Jang, Min Gyu, Chul Hee Lee, and Seung Bok Choi. "Stick-Slip Compensation of Micro-Positioning Using Elastic-Plastic Static Friction Model." Advanced Materials Research 47-50 (June 2008): 246–49. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.246.
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In this paper, a stick-slip compensation for the micro-positioning is presented using the statistical rough surface contact model. As for the micro-positioning structure, PZT (lead(Pb) zirconia(Zr) Titanate(Ti)) actuator is used to drive the load for precise positioning with its high resolution incorporating with the PID (Proportional Integral Derivative) control algorithm. Since the stick-slip characteristics for the micro structures are highly nonlinear and complicated, it is necessary to incorporate more detailed stick-slip model for the applications involving the high precision motion control. Thus, the elastic-plastic static friction model is used for the stick-slip compensation considering the elastic-plastic asperity contact in the rough surfaces statistically. Mathematical model of the system for the positioning apparatus was derived from the dynamic behaviors of structural parts. Since the conventional piezoelectric actuator generates the short stroke, a bridge-type flexural hinge mechanism is introduced to amplify the linear motion range. Using the proposed smart structure, simulations under the representative positioning motion were conducted to demonstrate the micro-positioning under the stick-slip friction.
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Irdina, Siti Hafizah, and Arta Ekayanti. "Efektivitas Model Pembelajaran Make A Match dan Talking Stick Terhadap Kemampuan Pemecahan Masalah Matematika." UNION: Jurnal Ilmiah Pendidikan Matematika 8, no. 1 (March 20, 2020): 21. http://dx.doi.org/10.30738/union.v8i1.5433.
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Penelitian ini bertujuan untuk mengetahui pengaruh Model Pembelajaran Make A Match dan Talking Stick terhadap kemampuan pemecahan masalah matematika. Juga untuk mengetahui apakah Model Pembelajaran Make A Match lebih efektif terhadap kemampuan pemecahan masalah matematika daripada Talking Stick. Penelitian ini merupakan penelitian eksperimen semu dengan sampel kelas VIII B dan VIII D dari seluruh siswa kelas VIII SMP Negeri 1 Babadan Ponorogo sebagai populasi. Kelas VIII B diberi pembelajaran Make A Match dan kelas VIII D diberi pembelajaran Talking Stick. Data penelitian diperoleh dari hasil tes kemampuan pemecahan masalah matematika yang kemudian dianalisis menggunakan Uji Wilcoxon, Uji Paired Sample t-Test, dan Uji Mann Withney. Diperoleh hasil bahwa Model Pembelajaran Make A Match dan Talking Stick berpengaruh terhadap kemampuan pemecahan masalah matematika. Model Pembelajaran Make A Match lebih efektif terhadap kemampuan pemecahan masalah matematika dibandingkan Talking Stick.
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Tran, Xuan Bo, Van Lai Nguyen, and Khanh Duong Tran. "Effects of friction models on simulation of pneumatic cylinder." Mechanical Sciences 10, no. 2 (October 30, 2019): 517–28. http://dx.doi.org/10.5194/ms-10-517-2019.
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Abstract. This study examines effects of three friction models: a steady-state friction model (SS model), the LuGre model (LG model), and the revised LuGre model (RLG model) on the motion simulation accuracy of a pneumatic cylinder. An experimental set-up of an electro-pneumatic servo system is built, and characteristics of the piston position, the pressures in the two-cylinder chambers and the friction force are measured and calculated under different control inputs to the proportional flow control valves. Mathematical model of the electro-pneumatic servo system is derived, and simulations are carried out under the same conditions as the experiments. Comparisons between measured characteristics and simulated ones show that the RLG model can give the best agreement among the three friction models while the LG model can only simulate partly the stick-slip motion of the piston at low velocities. The comparison results also show that the SS model used in this study is unable to simulate the stick-slip motion as well as creates much oscillations in the friction force characteristics at low velocities.
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Arifin, Zainal. "Perbandingan Model Pembelajaran Discovery Learning dan Talking Stick terhadap Hasil Belajar." EDURELIGIA; JURNAL PENDIDIKAN AGAMA ISLAM 2, no. 2 (June 27, 2018): 77–81. http://dx.doi.org/10.33650/edureligia.v2i2.457.
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Based on the statement of the problem how the comparison of students learning out comes used Learning model Discovery Learning and Talking Stick. Cooperative Learning model Discovery Learning and Talking Stick are one of model that are usually used in the mathematic Learning the advantage of them are can stimulate the development ability to think creatively and comprehensive, and stimulate student in order to more achre study. The purpose of this research was to know what it is there or no the comparison cooperative learning model Discovery Learning and Talking Stick of learning out come. The kind of this research was quantitative research with using the true experimental design post-test only control design. Before The researcher analysis data, I used the normality test and homogeneity test hypothesis test in data’s analysis. From the analysis result obtained the average value of class that was given cooperative Learning model type Talking Stick (control class) was higher than average role of class that was given cooperative learning model Discovery Learning (experiment class) by using the 5% error test then obtained -0,74<1.68, so t count t-table. The conclusion Ho was accepted, it mean that there was comparison cooperative Learning model Discovery Learning and Talking Stick to learning outcome.
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Alkaragoolee, MYA, KM Ebrahimi, and R. Whalley. "A hybrid model for a drilling process for hydrocarbon well-boring operations." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 231, no. 4 (March 7, 2017): 726–38. http://dx.doi.org/10.1177/1464419317697854.
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In hydrocarbon well-drilling operations, self-excited, stick-slip vibration is considered as a source of drilling equipment failures, which also causes a reduction in the drilling penetration. This leads to delays and increase in the operational and equipment costs. A new approach using distributed-lumped (hybrid) modelling is considered as the first step in understanding the stick-slip phenomena in order to determine a solution to this problem. In this paper, a hybrid modelling scheme is the advocated modelling method proposed in contrast to the conventional lumped modelling. Three case studies are used to show that hybrid modelling is an accurate technique in the representation of stick-slip oscillations, particularly when the length of the drill string is high. The results show that the modelling technique adopted in this work can more accurately present the phenomena associated with stick-slip process.