Detection of Hidden Object In Speech Based on Fast Fourier Transform Algorithm

In this paper steganalysis technique is proposed on the basis of spectral domain analysis using Discrete Fourier Transform, Fast Fourier Transform Algorithm (DFT_FFTA). The aim from using this algorithm is to provide robust evidence for presence of hidden object in speech segment. The Discrete Wavelet Transform (DWT) is used to decompose the speech segment, 20 seconds in length. The speech is decomposed to the third level. An image of 512x512 pixels embedded in the third level of the speech coefficients. Reverse Discrete Wavelet Transform (RDWT) is applied to get a speech with hidden object (image) called stego-speech. DFT_FFTA is used to analyze the stego-speech to discover an evidence of hidden object in the stegospeech .Experimental results shows that the proposed algorithm is comparable to previously existing techniques and give very clear and strong indication for the existence of stego-objec

Chemical Composition Of Neem Seedlings (Azadirachta Indica L.) Sprayed With Arginine, Kinetin, And Chelated Iron

A pot experiment was carried out in the canopy of the Horticulture and Landscape Department - College of Agriculture - University of Kerbala during the 2023-2024 season to study the effect of kinetin (K) (0, 50, 100 mg L-1), arginine (A) (0, 150, 300 mg L-1), and chelated iron (F) (0 and 200 mg L-1) on some qualitative characteristics of neem seedlings. The study was implemented as a factorial experiment with a completely randomized block design with three replications. The majority of chemical features were significantly impacted by kinetin spraying, with the exception of the proportion of nitrogen, potassium, and protein in the leaves. Arginine affected all traits except total chlorophyll, while chelated iron mainly impacted potassium percentage. The research factors had varying effects on the features under investigation in the binary interaction findings. Treatment K1A1 produced the greatest rate of total chlorophyll, measuring 56.19 mg g-1 fresh weight, While the Fe2A2 treatment was superior in increasing the percentage of carbohydrates (13.31 mg g dry weight-1). With an average percentage of 3.308% for nitrogen content and 0.1588% for phosphorus, treatment K0A2 and treatment K1A2 respectively yielded the greatest percentages. However, treatment K0A1 produced a substantially higher percentage of protein, at 20.67%. Only the percentage of phosphorus was significantly affected by the triple intervention; the K1A0Fe2 treatment produced the highest rate of 0.1640%. This study concludes that High kinetin levels may have adverse effects, but when combined with nutrient-rich fertilizers, they can enhance seedling characteristics of trees with medicinal benefits

Laser treatment effect on fatigue characterizations for steel alloy beam coated with nanoparticles

Link to publisher's homepage at http://ijneam.unimap.edu.my/Previous work investigated the effect of nano coating for steel beams on the fatigue characterization and calculated that the coating for beams leads to modifying the fatigue life and stress. Therefore, this work modifies the fatigue characterizations for beams by using laser treatment. The main aim of this work is to modify the fatigue properties of steel materials by using a coating surface, with nanoparticle materials, in addition to the laser treatment technique, at the same time. The experimental work was divided into three parts; first, the fabricated fatigue steel samples were coated by zinc oxide (ZnO) nanoparticle; second, treatment of the fatigue sample by laser technique using (low-high) and (high–low) loading; and finally, testing the fatigue samples to calculate the fatigue life and stress, with and without laser treatment. A scanning electron microscope (SEM) was used to study the surface morphology of the samples. In addition, the numerical technique, using the finite element, was employed to evaluate the fatigue characterizations for steel samples and the results were compared. The comparison of the numerical and experimental results shows that the maximum discrepancy did not exceed about 10.86%. Finally, the treatment of nanomaterials coated steel samples shows that the fatigue characterizations were more than 35%

Global overview of the management of acute cholecystitis during the COVID-19 pandemic (CHOLECOVID study)

Background: This study provides a global overview of the management of patients with acute cholecystitis during the initial phase of the COVID-19 pandemic. Methods: CHOLECOVID is an international, multicentre, observational comparative study of patients admitted to hospital with acute cholecystitis during the COVID-19 pandemic. Data on management were collected for a 2-month study interval coincident with the WHO declaration of the SARS-CoV-2 pandemic and compared with an equivalent pre-pandemic time interval. Mediation analysis examined the influence of SARS-COV-2 infection on 30-day mortality. Results: This study collected data on 9783 patients with acute cholecystitis admitted to 247 hospitals across the world. The pandemic was associated with reduced availability of surgical workforce and operating facilities globally, a significant shift to worse severity of disease, and increased use of conservative management. There was a reduction (both absolute and proportionate) in the number of patients undergoing cholecystectomy from 3095 patients (56.2 per cent) pre-pandemic to 1998 patients (46.2 per cent) during the pandemic but there was no difference in 30-day all-cause mortality after cholecystectomy comparing the pre-pandemic interval with the pandemic (13 patients (0.4 per cent) pre-pandemic to 13 patients (0.6 per cent) pandemic; P = 0.355). In mediation analysis, an admission with acute cholecystitis during the pandemic was associated with a non-significant increased risk of death (OR 1.29, 95 per cent c.i. 0.93 to 1.79, P = 0.121). Conclusion: CHOLECOVID provides a unique overview of the treatment of patients with cholecystitis across the globe during the first months of the SARS-CoV-2 pandemic. The study highlights the need for system resilience in retention of elective surgical activity. Cholecystectomy was associated with a low risk of mortality and deferral of treatment results in an increase in avoidable morbidity that represents the non-COVID cost of this pandemic

Bisphosphonate-induced femoral fragility fractures: What do we know?

Arkan S Sayed-Noor1,2, Bakir K Kadum1, Göran O Sjödén1,21Department of Orthopaedic Surgery, Sundsvall Hospital, Sundsvall, Sweden; 2Department of Surgical and Perioperative Sciences, Norrlands University Hospital, Umeå, SwedenAbstract: Bisphosphonates (BPs), in particular alendronate, are the cornerstone of treatment for postmenopausal osteoporosis. The efficacy and safety of these drugs are well documented in the literature. However, increasing numbers of reports show a possible association between long-term treatment with BPs and the occurrence of characteristic femoral fragility fractures. In this review article, we discuss the existing reports in regard to the natural history and management of these fractures. Orthopedic surgeons and other specialists dealing with patients on BP therapy should be aware of this possible association because patients with BP-induced femoral fragility fractures warrant prompt surgical management.Keywords: bisphosphonate, alendronate, osteoporosis, fragility fractures, microdamage, bone turnove

Experimental and Simulation investigations of Micro Flexible Deep Drawing Using Floating Ring Technique

Micro metal forming has an application potential in different industrial fields. Flexible tool-assisted sheet metal forming at micro scale is among the forming techniques that have increasingly attracted wide attention of researchers. This forming process is a suitable technique for producing micro components because of its inexpensive process, high quality products and relatively high production rate. This study presents a novel micro deep drawing technique through using floating ring as an assistant die with flexible pad as a main die. The floating ring designed with specified geometry is located between the process workpiece and the rubber pad. The function of the floating ring in this work is to produce SS304 micro cups with profile radius precision as required as possible. The finite element simulations are accomplished using the commercial code Abaqus/Standard. In order to verify the simulation models, micro deep drawing experiments are carried out using a special set up developed specifically to meet the requirements of the simulations. The results revealed that the proposed technique is feasible to be adopted for producing micro cups with remarkable application capability in miniaturization technology.</jats:p

Experimental and Simulation investigations of Micro Flexible Deep Drawing Using Floating Ring Technique

Micro metal forming has an application potential in different industrial fields. Flexible tool-assisted sheet metal forming at micro scale is among the forming techniques that have increasingly attracted wide attention of researchers. This forming process is a suitable technique for producing micro components because of its inexpensive process, high quality products and relatively high production rate. This study presents a novel micro deep drawing technique through using floating ring as an assistant die with flexible pad as a main die. The floating ring designed with specified geometry is located between the process workpiece and the rubber pad. The function of the floating ring in this work is to produce SS304 micro cups with profile radius precision as required as possible. The finite element simulations are accomplished using the commercial code Abaqus/Standard. In order to verify the simulation models, micro deep drawing experiments are carried out using a special set up developed specifically to meet the requirements of the simulations. The results revealed that the proposed technique is feasible to be adopted for producing micro cups with remarkable application capability in miniaturization technology.</jats:p

Simulation of Attractive Interaction Reaction for Binary Alloys

In this research the attractive interaction reactions of binary alloy solidification have been simulated. A mean - field kinetic equations have been used in this investigation in order to simulate the crystal lattice of two metals of complete solid and liquid solubility ( compete miscibility ) with solid solution types. The simulation was conducted in a dimensionless method. The results showed that the maximum free energy f(p) decreased to the minimum level that is (-0.052) at (0.96) and (0.04)weight percentage concentration for the A and B metals respectively. On the other hand, the free energy increased until it reached its maximum level (-0.005) at a (0.5) concentration for both metals. Results also showed that the maximum free energy values gave a symmetrical trend before and after the concentration balance of the two metals used. A pseudo eutectic alloy has been formed at (0.5) concentration for the two metals at thermal energy level (KT) equal to (1). Also a symmetrical trend has been formed for concentration values of both metals before and after the eutectic alloy formation