Ghost-vibrational resonance

Ghost-stochastic resonance is a noise-induced resonance at a fundamental frequency missing in the input signal. We investigate the effect of a high-frequency, instead of a noise, in a single Duffing oscillator driven by a multi-frequency signal $F(t)= \sum^n_{i=1} f_i \cos(\omega_i + \Delta \omega_0)t$, $\omega_i=(k+i-1)\omega_0$, where $k$ is an integer greater than or equal to two. We show the occurrence of a high-frequency induced resonance at the missing fundamental frequency $\omega_0$. For the case of the two-frequency input signal, we obtain an analytical expression for the amplitude of the periodic component with the missing frequency. We present the influence of the number of forces $n$, the parameter $k$, the frequency $\omega_0$ and the frequency shift $\Delta \omega_0$ on the response amplitude at the frequency $\omega_0$. We also investigate the signal propagation in a network of unidirectionally coupled Duffing oscillators. Finally, we show the enhanced signal propagation in the coupled oscillators in absence of a high-frequency periodic force

MODEL OPTIMISASI SATUAN RUANG LAHAN PARKIR PASAR PADA PERSIMPANGAN

Setiap kendaraan yang berjalan selalu membutuhkan tempat untuk parkir.Kendaraan yang parkir di Simpang Tujuh Ulee Kareng sering menghambatpergerakan lalu lintas, hal ini dikarenakan pemakaian lahan parkir yang tidakseharusnya atau tidak diparkirkan dengan benar. Dalam mengatasi masalah ini,pengelola parkir harus mampu mengelola sistem parkir secara tepat sehinggalahan yang tersedia dapat dimanfaatkan secara optimal dan efisien. Penelitian iniberusaha membangun model optimisasi satuan ruang parkir (SRP) danmenerapkannya di Simpang Tujuh Ulee Kareng. Metode Integer LinearProgramming (ILP) digunakan untuk menentukan jumlah SRP maksimum disuatu lahan parkir. Hasil penelitian menunjukkan bahwa lahan parkir yang beradapada radius 180 m dari persimpangan di Simpang Tujuh Ulee Kareng memilikiSRP optimal sebesar 4448 unit sepeda motor. Lahan yang paling banyak memilikidaya tampung SRP berada pada Jln Lamreung yaitu dengan SRP optimal 1198unit sepeda motor dan lahan yang memiliki daya tampung paling sedikit beradapada jalan Jln. Masjid Tuha yaitu dengan SRP optimal 49 unit sepeda motor.Kata Kunci: Optimisasi, Model Satuan Ruang Parkir (SRP), Metode IntegerLinear Programming

Intractable policy failure: the case of bovine TB and badgers

The failure to eliminate bovine TB from the English and Welsh cattle herd represents a long-term intractable policy failure. Cattle-to-cattle transmission of the disease has been underemphasised in the debate compared with transmission from badgers despite a contested evidence base. Archival evidence shows that mythical constructions of the badger have shaped the policy debate. Relevant evidence was incomplete and contested; alternative framings of the policy problem were polarised and difficult to reconcile; and this rendered normal techniques of stakeholder management through co-option and mediation of little assistance

Assessment of the Impact of Potential Tetracycline Exposure on the Phenotype of Aedes aegypti OX513A: Implications for Field Use

Aedes aegypti is the primary vector of dengue fever, a viral disease which has an estimated incidence of 390 million infections annually. Conventional vector control methods have been unable to curb the transmission of the disease. We have previously reported a novel method of vector control using a tetracycline repressible self-limiting strain of Ae. aegypti OX513A which has achieved >90% suppression of wild populations.We investigated the impact of tetracycline and its analogues on the phenotype of OX513A from the perspective of possible routes and levels of environmental exposure. We determined the minimum concentration of tetracycline and its analogues that will allow an increased survivorship and found these to be greater than the maximum concentration of tetracyclines found in known Ae. aegypti breeding sites and their surrounding areas. Furthermore, we determined that OX513A parents fed tetracycline are unable to pre-load their progeny with sufficient antidote to increase their survivorship. Finally, we studied the changes in concentration of tetracycline in the mass production rearing water of OX513A and the developing insect.Together, these studies demonstrate that potential routes of exposure of OX513A individuals to tetracycline and its analogues in the environment are not expected to increase the survivorship of OX513A

The MATHUSLA Test Stand

The rate of muons from LHC $pp$ collisions reaching the surface above the ATLAS interaction point is measured and compared with expected rates from decays of $W$ and $Z$ bosons and $b$- and $c$-quark jets. In addition, data collected during periods without beams circulating in the LHC provide a measurement of the background from cosmic ray inelastic backscattering that is compared to simulation predictions. Data were recorded during 2018 in a 2.5 $\times$ 2.5 $\times$ 6.5~$\rm{m}^3$ active volume MATHUSLA test stand detector unit consisting of two scintillator planes, one at the top and one at the bottom, which defined the trigger, and six layers of RPCs between them, grouped into three $(x,y)$-measuring layers separated by 1.74 m from each other. Triggers selecting both upward-going tracks and downward-going tracks were used.Comment: 18 pages, 11 figures, 1 tabl

Marine Animal Forest of the World (MAF WORLD)

Marine Animal Forest of the World (MAF WORLD

The Correlation between Self-Talk and Speaking Ability

This research used correlational quantitative research design. This research aims to find out whether there is a positive correlation between students\u27 self-talk and their speaking’s ability. The sample of this research consists of 30 students from the academic year 2021/2022 of English Education Study Program at Tadulako University. The sampling technique used in this study is simple random sampling. The instruments used to collect data were  a speaking test and a questionnaire. The method used to analyze the correlation between students\u27 self-talk and students\u27 speaking ability is the Pearson product-moment correlation and simple linear regression test. The result of this research showed that there is a significant correlation between self-talk and students’ speaking ability. This correlation is indicated by a Pearson correlation value of 0.883, which means there is a very strong correlation between the two variables. The value of t-count is 9.975, higher than the t-table 2.048. This implies that students’ self-talk can influence the development of speaking ability. The higher the positive self-talk that students have, the better their speaking ability will be. Conversely, the higher the negative self-talk that students have, the lower their speaking ability will be

Genomics of Divergence along a Continuum of Parapatric Population Differentiation

MM received funding from the Max Planck innovation funds for this project. PGDF was supported by a Marie Curie European Reintegration Grant (proposal nr 270891). CE was supported by German Science Foundation grants (DFG, EI 841/4-1 and EI 841/6-1)

Analisis Pemahaman Konseptual Siswa SMP Materi Himpunan

Penelitian ini bertujuan untuk mendeskripsikan pemahaman konseptual siswa materi himpunan. Penelitian ini merupakan penelitian kualitatif. Subjek penelitian adalah siswa kelas VIII-B MTsN 1 Jombang tahun pelajaran 2023-2024. Instrumen yang digunakan adalah tes pemahaman konseptual dan pedoman wawancara yang divalidasi oleh validator ahli. Teknik analisis data adalah reduksi data, penyajian data, dan penarikan kesimpulan. Data hasil tes dan wawancara dianalisis dengan mengacu pada indicator pemahaman konseptual. Hasil penelitian menunjukkan bahwa subjek menyatakan ulang suatu konsep yang berkaitan dengan himpunan menggunakan bahasanya sendiri. Subjek mengubah suatu konsep matematis himpunan ke dalam bentuk lain dengan tidak mengubah makna dari konsep yang ada, hampir sempurna namun siswa tidak memberikan keterangan nama himpunan. Subjek kurang sempurna dalam menjelaskan perbedaan dan persamaan antar konsep matematik pada himpunan beserta alasannya, siswa hanya menuliskan himpunannya saja tanpa memberikan keterangan alasan dari contoh himpunan dan bukan himpunan yang dituliskan. Subjek kurang sempurna dalam mengelompokkan objek-objek berdasarkan syarat perlu atau syarat cukup suatu konsep himpunan. Subjek hanya menuliskan opsi dari jawabannya saja tanpa menuliskan nama beserta anggota himpunannya dan siswa belum memahami konsep dari himpunan yang mempunyai anggota nol. Subjek menerapkan konsep himpunan dalam pemecahan masalah, namun belum optimal

The Use of Folktale to Improve Reading Comprehension of The Eighth Grade Students\u27

This research is aimed at finding out whether the use of folktales can improve the reading comprehension of the eighth-grade students of SMP Negeri 13 Sigi. The sample was selected using the random sampling technique. The sample of this research were 54 students, which were divided into 27 students of class VIII B as an experimental group and 27 students of class VIII D as a control group. The data were collected through the reading test that consisted of pre-test and post-test. The mean score of the experimental group on the pre-test was 42 and the control group was 42. Then, the mean score of the post-test for the experimental group was 67 and the control group was 59. The data were analyzed statistically using the t-test formula with degrees of freedom Nx+Ny-2-27+27-2-52. The findings show that the t-counted value is 4.364 while the t-table value is 2.006. This means that the t-counted is higher than the t-table. Therefore, the research hypothesis is accepted. These findings answered the question from the problem formulation that the use of Folktale can improve reading comprehension of the eighth-grade students of SMP Negeri 13 Sigi. The implication of this finding is that Folktale can improve students\u27 literacy, make learning more enjoyable, and boost their activeness and engagement in the learning process.