Tuning Charge Order in (TMTTF)2X by Partial Anion Substitution

In the quasi-one-dimensional (TMTTF)2X compounds with effectively quarter-filled bands, electronic charge order is stabilized from the delicate interplay of Coulomb repulsion and electronic bandwidth. The correlation strength is commonly tuned by physical pressure or chemical substitution with stoichiometric ratios of anions and cations. Here, we investigate the charge-ordered state through partial substitution of the anions in (TMTTF)2[AsF6]1−x[SbF6]x with x≈0.3, determined from the intensity of infrared vibrations, which is sufficient to suppress the spin-Peierls state. Our dc transport experiments reveal a transition temperature TCO = 120 K and charge gap ΔCO=430 K between the values of the two parent compounds (TMTTF)2AsF6 and (TMTTF)2SbF6. Upon plotting the two parameters for different (TMTTF)2X, we find a universal relationship between TCO and ΔCO yielding that the energy gap vanishes for transition temperatures TCO≤60 K. While these quantities indicate that the macroscopic correlation strength is continuously tuned, our vibrational spectroscopy results probing the local charge disproportionation suggest that 2δ is modulated on a microscopic level.

Hubungan Pengetahuan dan Sikap Dengan Perilaku Pencegahan Demam Tifoid Pada Penjamah Makanan

Typhoid fever is a disease that attacks the digestive tract, caused by the bacteria Salmonella typhi. This disease can occur due to low personal hygiene, slum environmental sanitation, and habit of snacking carelessly. Typhoid fever prevention behavior in food handlers is needed to reduce the incidence of typhoid fever, where this behavior is influenced by the knowledge and attitudes of the food handlers about the prevention of typhoid fever. The purpose of this research was to determine the correlation between knowledge and attitudes about typhoid fever prevention with typhoid fever prevention behavior in food handlers in Air Hitam Sub District Payung Sekaki District Pekanbaru City. The research method used an analytic survey with a cross sectional approach. The sampling technique used accidental sampling with a sample size of 30 respondents. The data analysis used the Spearman correlation test, because the data were not normally distributed. There was a relationship between knowledge about typhoid fever prevention and typhoid fever prevention behaviors among food handlers with moderate correlation strength and positive correlation direction (p-value = 0.000; r = 0.555). There was also a relationship between attitudes about typhoid fever prevention and typhoid fever prevention behaviors among food handlers with strong correlation strength and positive correlation direction (p-value = 0.000; r = 0.674). The conclusion of this research was knowledge and attitude about typhoid fever prevention correlate with typhoid fever prevention behaviors among food handlers in Air Hitam Sub District Payung Sekaki District Pekanbaru City.

HUBUNGAN TINGKAT KECEMASAN DENGAN POLA TIDUR PADA LANSIA

Latar belakang : Saat ini Negara Indonesia sedang dilanda pandemi Covid-19 yang mengakibatkan perubahan baik secara fisik maupun psikologi, baik pada usia muda maupun pada lanjut usia. Kondisi ini tidak hanya berdampak pada kesehatan fisik namun juga mempengaruhi kondisi mentalitas individu, termasuk pada golongan Lansia. Hasil penelitian menunjukkan bahwa mayoritas Lansia mengalami kecemasan di masa pandemi dengan mayoritas termasuk dalam kategori sedang (48,1%). Kondisi ini bukanlah hal yang dapat dianggap sederhana karena kecemasan dikhawatirkan dapat menimbulkan ketakutan hebat dan menetap pada Lansia sehingga dapat menimbulkan gangguan baik secara fisik maupun psikologis. Tujuan : Mengetahui hubungan tingkat kecemasan dengan pola tidur pada Lansia di Panti Wredha Widhi Asih. Subyek dan Metode : Jenis penelitian ini adalah analitik observasional dengan desain korelasional melalui pendekatan crossectional. Populasi penelitian adalah semua Lansia di Panti Wredha Widhi Asih. Teknik sampling yang digunakan adalah jenuh. Data dianalisis menggunakan uji korelasi Spearman. Hasil : Skor tingkat kecemasan lansia paling banyak 4 dengan kategori ringan yaitu 19%. Namun demikian ditemukan pula lansia yang mendapatkan skor tingkat kecemasan 20 yaitu 4,8%. Pola tidur responden bervariasi, dilihat dari kuantitas tidurnya yaitu antara 5-9 jam dengan mayoritas kuantitas tidur paling sedikit 5-5,5 jam (4,8%) dan paling banyak 8 jam (38,1%). Hasil analisis uji korelasi Spearman menunjukkan korelasi antara tingkat kecemasan dengan pola tidur adalah tidak bermakna. Nilai korelasi Spearman sebesar -0,313 menunjukkan arah korelasi negatif dengan kekuatan korelasi lemah. Kesimpulan : Hubungan antara tingkat kecemasan dengan pola tidur adalah tidak bermakna. Nilai korelasi Spearman sebesar -0,313 menunjukkan arah korelasi negatif dengan kekuatan korelasi lemah. Kata Kunci : kecemasan, lansia, pola tidur RELATIONSHIP BETWEEN ANXIETY LEVELS AND SLEEP PATTERNS IN THE ELDERLY Background: Currently, the State of Indonesia is being hit by the Covid-19 pandemic which causes changes both physically and psychologically, both at a young age and in the elderly. This condition not only has an impact on physical health but also affects the mental condition of individuals, including the elderly. The results showed that the majority of the elderly experienced anxiety during the pandemic with the majority being in the moderate category (48.1%). This condition is not something that can be considered simple because it is feared that anxiety can cause severe and permanent fear in the elderly so that it can cause disturbances both physically and psychologically. Objective: To determine the relationship between anxiety levels and sleep patterns in the elderly at the Wredha Widhi Asih Home. Subjects and Methods: This type of research is analytic observational with a correlational design through a cross-sectional approach. The population of the study were all the elderly at the Wredha Widhi Asih Nursing Home. The sampling technique used is saturated. Data analysis using Spearman Correlation Test. Result: The highest score of anxiety level is 4 (19%) in the mild category. However, the elderly who got a level 20 score of 4.8% were found. The respondent's sleep pattern varies, seen from the quantity of sleep, which is between 5-9 hours, with a minimum sleep quantity of 5-5.5 hours (4.8%) and a maximum of 8 hours (38.1%). The results of the Spearman correlation test analysis showed that the correlation between anxiety levels and sleep patterns was not significant. Spearman correlation value of -0.313 indicates the direction of negative correlation with weak correlation strength. Conclusion: the correlation between anxiety levels and sleep patterns is not significant. Spearman correlation value of -0.313 indicates the direction of negative correlation with weak correlation strength. Keywords: anxiety, elderly, sleep pattern

Psychophysical interactions with entangled photons

Objective: Four laboratory studies and an online experiment explored psychophysical (mind-matter) interactions with quantum entangled photons. Method: Entanglement correlation strength measured in real-time was presented via a graph or dynamic images displayed on a computer monitor or web browser. Participants were tasked with mentally influencing that metric. Results: A statistically significant increase in entanglement strength was obtained in experimental conditions in the four lab studies (p < 0.02), with particularly strong results observed in three studies conducted at the Institute of Noetic Sciences (p < 0.0002). Modest results (p < 0.05) were observed in a high-quality subset of entanglement samples in an online experiment. Control experiments using the same equipment and protocols, but without observers present, showed results consistent with chance expectation in both the lab and online studies. Conclusion: These outcomes suggest that the fidelity of entangled states and the nonlocal resource they entail may be mutable in systems that include conscious awareness. This is potentially of interest for quantum information technologies such as quantum computation, encryption, key distribution, and teleportation. The results are also relevant for interpretations of quantum theory, especially if future studies show that entanglement strength can be mentally modulated above the Tsirelson Bound – the upper limit predicted by quantum theory. Such an outcome would suggest that quantum theory in its present form does not hold when physical systems interact with certain mental states. The results of these exploratory experiments justify continued investigation of entangled photons as targets of mind-matter interaction.

Correlation of Peak Systolic Velocity Value with Wagner Score in Diabetic Foot Ulcer patients in RSUP Dr. M. Djamil Padang

Background: Diabetic foot ulcers are one of the chronic complications of diabetes mellitus (DM) in the form of wounds on the skin surface of the feet of DM patients accompanied by internal tissue damage or tissue death, either with or without infection, which is associated with the presence of neuropathy and or peripheral arterial disease in patients with DM. The World Health Organization (WHO) states that at least 422 million people suffer from DM A new alternative parameter for assessing the degree of peripheral ischemia is ankle peak systolic velocity (PSV). The rationale for PSV is based on the observation that in the ischemic limb, blood travels at a much slower rate in the distal leg arteries than in the nonischemic limb. PSV is a quick and easy test to assess the patient's vascular status and monitor the development of diabetic foot ulcers, and can assess the degree of ischemia and predict healing of diabetic foot ulcers. This study aims to determine the Correlation of Peak Systolic Velocity Value with Wagner Score in Diabetic Foot Ulcer patients in RSUP Dr. M. Djamil Padang. Methods: This research is analytic observational with cross sectional design, the research uses primary data. This research will be conducted at the RSUP Dr. M. Djamil Padang from July 2021 to October 2021. The population in this study were diabetic foot ulcer patients who came for treatment at Dr. M. Djamil Padang. A sample of 32 patients Diabetic foot ulcer met the inclusion criteria. Univariate analysis was conducted to describe each of the variables studied. Numerical data is normally distributed, then it is presented in the form of mean ± standard deviation (SD), whereas if the numerical data is not normally distributed then it is presented in the form of median, minimum and maximum. Categorical data is presented in the form of frequency and percentage of each category. Bivariate analysis was started by using the data normality test using the Shapiro Wilk test (n<50). In testing the correlation between Peak Systolic Velocity and Wagner Score in diabetic foot ulcer patients, the Pearson correlation test is used if the data is normally distributed. Data analysis using SPSS version 22.0. Results: more than half of the subjects (65.6%) are male. The mean age of the subjects was 60.46±10.06 years. More than half of the subjects (62.5%) had a normal body mass index. The average length of suffering from diabetes mellitus was 5.48 ± 2.26 years. Half had a history of smoking (59.4%), a small proportion of subjects had hypertension (21.9%), hypercholesterolemia (6.3%) and neuropathy (12.5%). More than half of the subjects (53.1%) had immunopathies. There is a correlation between the popliteal PSV value and the Wagner score in diabetic ulcer patients (p<0.05), with a moderate correlation strength (r=-0.463) and a negative direction. There is a correlation between the PSV dorsali pedis value and the Wagner score in diabetic ulcer patients (p<0.05), with a strong correlation strength (r=-0.720) and in a negative direction. Furthermore, there is a correlation between the posterior tibial PSV value and the Wagner score in diabetic ulcer patients (p<0.05), with a moderate correlation strength (r=-0.530) and a negative direction. Conclusion: There is a correlation between the popliteal, tibialis posterior, dorsalis pedis PSV value and the Wagner score in diabetic foot ulcer patient

Initial Assessments of a Handheld Indentation Probe's Correlation with Cancellous Bone Density, Stiffness and Strength: An Objective Alternative to 'Thumb Testing'

During shoulder arthroplasty, surgeons must select the optimal implant for each patient. The metaphyseal bone properties affect this decision; however, the typical resection 'thumb test' lacks objectivity. The purposes of this investigation were: to determine the correlation strength between the indentation depth of a handheld mechanism and the density, compressive strength and modulus of a bone surrogate; as well as to assess how changing the indenter tip shape and impact energy may affect the correlation strengths. A spring-loaded indenter was developed. Four tip shapes (needle, tapered, flat and radiused cylinders) and four spring energies (0.13J-0.76J) were assessed by indenting five cellular foam bone surrogates of varying density. The indentation depth was measured and correlated with apparent density, compressive strength and modulus. Indentation depth plateaued as the bone surrogate's material properties increased, particularly for indentation tips with larger footprints and the 0.13J spring. All tip shapes produced strong (R2≥0.7) power-law relationships between the indentation depth metric and the bone surrogate's material properties (density: 0.70 ≤ R2 ≤ 0.95, strength: 0.75 ≤ R2 ≤ 0.97, modulus: 0.70 ≤ R2 ≤ 0.93); though use of the needle tip yielded the widest indentation depth scale. These strong correlations suggest that a handheld indenter may provide objective intraoperative evidence of cancellous material properties. Further investigations are warranted to study indenter tip shape and spring energy in human tissue; though the needle tip with spring energy between 0.30J and 0.76J seems the most promising.

Source Symbol Purging-Based Distributed Conditional Arithmetic Coding

A distributed arithmetic coding algorithm based on source symbol purging and using the context model is proposed to solve the asymmetric Slepian–Wolf problem. The proposed scheme is to make better use of both the correlation between adjacent symbols in the source sequence and the correlation between the corresponding symbols of the source and the side information sequences to improve the coding performance of the source. Since the encoder purges a part of symbols from the source sequence, a shorter codeword length can be obtained. Those purged symbols are still used as the context of the subsequent symbols to be encoded. An improved calculation method for the posterior probability is also proposed based on the purging feature, such that the decoder can utilize the correlation within the source sequence to improve the decoding performance. In addition, this scheme achieves better error performance at the decoder by adding a forbidden symbol in the encoding process. The simulation results show that the encoding complexity and the minimum code rate required for lossless decoding are lower than that of the traditional distributed arithmetic coding. When the internal correlation strength of the source is strong, compared with other DSC schemes, the proposed scheme exhibits a better decoding performance under the same code rate.

Heterogeneous Correlation Map Between Estimated ENSO And IOD From ERA5 And Hotspot In Indonesia

El Nino-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) can reduce the amount of rainfall in Indonesia. The previous study found that ENSO and IOD derived from the OISST dataset have an association with hotspots in Indonesia, especially in southern Sumatra dan Kalimantan. But the correlation results are still too small, and the correlation strength between regions has not been analyzed. Therefore, this study quantifies the association of the estimated ENSO and IOD derived from the ERA5 dataset on hotspots in Indonesia based on a Heterogeneous Correlation Map (HCM) and analyzes the correlation strength between regions in Indonesia. We use a singular value decomposition method to quantify this HCM. Besides OISST, ERA5 is an estimation data often used for weather forecast analysis. Therefore, this study quantifies the association of the estimated ENSO and IOD derived from the ERA5 dataset on hotspots in Indonesia based on a Heterogeneous Correlation Map (HCM) and analyzes the correlation strength between regions in Indonesia. Based on variance explained and correlation strength, the hotspot in Indonesia is more sensitive to ENSO and IOD derived from ERA5 than OISST. Consequently, the ERA5 data more useful to statistical analysis that requiring a substantial correlation.

How Strong Should My Anchor Be For Estimating Group And Individual Level Meaningful Change? A Simulation Study Assessing Anchor Correlation Strength And The Impact of Sample Size, Distribution of Change Scores And Methodology On Establishing A True Meaningful Change Threshold.

Purpose: Treatment benefit as assessed using clinical outcome assessments (COAs), is a key endpoint in many clinical trials at both the individual and group level. Anchor-based methods can aid interpretation of COA change scores beyond statistical significance, and help derive a meaningful change threshold (MCT). However, evidence-based guidance on the selection of appropriately related anchors is lacking. Methods: A simulation was conducted which varied sample size, change score variability and anchor correlation strength to assess the impact of these variables on recovering the true simulated MCT at both the individual and group-level. At the individual-level, Receiver Operating Characteristic (ROC) curves and Predictive Modelling (PM) anchor analyses were conducted. At the group-level, group means of the ‘not-improved’ and ‘improved’ groups were compared. Results: Sample sizes, change score variability and magnitude of anchor correlation affected accuracy of the estimated MCT. At the individual-level, ROC curves were less accurate than PM methods at recovering the true MCT. For both methods, smaller samples led to higher variability in the returned MCT, but higher variability still using ROC. Anchors with weaker correlations with COA change scores had increased variability in the estimated MCT. An anchor correlation of 0.50-0.60 identified a true MCT cut-point under certain conditions using ROC. However, anchor correlations as low as 0.30 were appropriate when using PM under certain conditions. At the group-level, the MCT was consistently underestimated regardless of the anchor correlation. Conclusion: Findings show that the chosen method, sample size and variability in change scores influence the necessary anchor correlation strength when identifying a true individual-level MCT. Often, this needs to be higher than the commonly accepted threshold of 0.30. Stronger correlations than 0.30 are required at the group-level, but a specific recommendation is not provided. Results can be used to assist researchers selecting and assessing the quality of anchors.