Effect of mother’s position in active phase of labour on length of labour

زمینه و هدف: استفاده از روشهایی که بتواند الگوی انقباضات رحمی را نظم بخشیده و به تسریع لیبر کمک کند، همیشه مدنظر بوده است. یکی از این روشها استفاده از پوزیشن‌های مختلف در طی لیبر می‌باشد. هدف از این مطالعه بررسی وضعیت قرار گرفتن مادر در مرحله فعال زایمان بر طول مدت فاز فعال، آپگار نوزاد و نوع زایمان بود. روش بررسی: در این مطالعه کارآزمایی بالینی 200 نفر از زنان باردار که برای انجام زایمان طبیعی به زایشگاه بیمارستان امام خمینی فلاورجان مراجعه و بستری شده بودند به روش در دسترس انتخاب و به صورت تصادفی در چهار گروه: وضعیت خوابیده به پهلو، نشسته، در حرکت و آزاد (هر گروه 50 نفر) تقسیم بندی شدند. اطلاعات با استفاده از پرسشنامه شامل اطلاعات دموگرافیک و اطلاعات مربوط به زایمان و نوزاد جمع آوری و به کمک آزمون های آماری کای دو و آنالیز واریانس تجزیه و تحلیل گردید. یافته‌ها: میانگین طول مدت مرحله فعال زایمان در گروه خوابیده به پهلو، نشسته، در حرکت و گروه آزاد به ترتیب 52/0±57/3، 31/0±23/2، 25/0±46/2 و 16/0±25/2 ساعت بود. در گروه خوابیده به پهلو طول مدت مرحله فعال زایمان بیشتر از سه گروه دیگر بود (01/0

On the Conceptualization of the Concept Map Limit the Case of Mathematics Students

In new teaching-learning approaches, it is emphasized in meaningful learning versus rote learning .So assessment and evaluation as an inseparable part of the educational process should also be altered to suit the new educational approaches. One of the new tools for assessment and evaluation of conceptual knowledge is conceptual scheme. Conceptual scheme contains concepts or phrases that are set in a circle or other geometric shapes and lines connecting with the significant relationship together. Conceptual scheme is a useful tool for education, curriculum development, assessment and evaluation of learning. In this study, using the conceptual scheme, understanding of 25 third-year students who major in mathematics teacher in the Shahid Rajaee Teacher Training University was evaluated about limit concept. After familiarizing students with the conceptual scheme in three stages, students come with software to draw a conceptual scheme of “limit” individually and in groups. The findings show that misunderstanding and errors was reduced at each stage compared to a previous stage. Width and length relations get closer, more, and more complex respectively. Some misunderstanding of students that were identified in this way includes: (2) Definition of limit to a point where some students thought that the point should be in the function domain. (2)Some of them knew “limit’ ’for sequence divergence. (3)All asymptotic have not stated using the limit. Identify the misunderstanding of students using the traditional tools of evaluation was not possible. Moreover, according to the standard connections in learning, the relationship represents a deeper conceptual understanding of the concept when relations increase. The results can provide a basis for revision of assessment methods and improving the quality of educational designin

Accuracy of working length determination with root ZX apex locator and radiography: An in vivo and ex vivo study

The purpose of this study was to clinically compare working length (WL) determination with root ZX apex locator and radiography, and then compare them with direct visualization method ex vivo. A total of 75 maxillary central and lateral incisors were selected. Working length determination was carried out using radiographic and electronic apex locator methods. Subsequently, the tooth under study was extracted and actual working length was determined directly under a stereomicroscope. Data were analyzed by Wilcoxon signed-rank, Spearman’s correlation coefficient and intra-class correlation tests. All the statistical analyses were set with a significance level of α = 0.05. The absolute measurement errors of the two methods were compared using Wilcoxon signed test, exhibiting no statistically significant difference in measurement errors between the two methods. Descriptive evaluation revealed that in 72% (n = 54) of the specimens, both methods had errors in the same direction and in 28% (n = 21) of the specimens, the two methods had errors in opposite directions. Intra-class correlation coefficient test demonstrated a high degree of agreement between the two methods. In conclusion, this study did not show any difference between radiography, root ZX and direct visualization in WL determination.Key words: Working length, electronic apex locator, root ZX, radiography

Herbal-based drugs for dry eye; treatment and adverse reaction

33-40Dry eye syndrome is one of the most common types of eye diseases. Due to the significant prevalence of the disease, there is an important need for treatment of dry eye in a simple but efficient way. Artificial tears are the most common agents used for treating dry eye but are not very useful. In recent years, the use of herbal remedies has attracted much attention, because the process of producing most herbal remedies is simple, inexpensive and has fewer side effects. In many clinical studies, the potential interactions between medicines and herbs have been demonstrated. According to reports, some herbal products have the potential to be used for the treatment of dry eye while the use of certain products can lead to this syndrome. In this review, we have listed some of the herbal drugs and components which can prevent or treat the dry eye or cause it

Progress and Perspectives Beyond Traditional RAFT Polymerization.

The development of advanced materials based on well-defined polymeric architectures is proving to be a highly prosperous research direction across both industry and academia. Controlled radical polymerization techniques are receiving unprecedented attention, with reversible-deactivation chain growth procedures now routinely leveraged to prepare exquisitely precise polymer products. Reversible addition-fragmentation chain transfer (RAFT) polymerization is a powerful protocol within this domain, where the unique chemistry of thiocarbonylthio (TCT) compounds can be harnessed to control radical chain growth of vinyl polymers. With the intense recent focus on RAFT, new strategies for initiation and external control have emerged that are paving the way for preparing well-defined polymers for demanding applications. In this work, the cutting-edge innovations in RAFT that are opening up this technique to a broader suite of materials researchers are explored. Emerging strategies for activating TCTs are surveyed, which are providing access into traditionally challenging environments for reversible-deactivation radical polymerization. The latest advances and future perspectives in applying RAFT-derived polymers are also shared, with the goal to convey the rich potential of RAFT for an ever-expanding range of high-performance applications

Chemical-free lysis and fractionation of cells by use of surface acoustic waves for sensitive protein assays

We exploit the mechanical action of surface acoustic waves (SAW) to differentially lyse human cancer cells in a chemical-free manner. The extent to which cells were disrupted is reported for a range of SAW parameters, and we show that the presence of 10 μm polystyrene beads is required to fully rupture cells and their nuclei. We show that SAW is capable of subcellular fractionation through the chemical-free isolation of nuclei from whole cells. The concentration of protein was assessed in lysates with a sensitive microfluidic antibody capture (MAC) chip. An antibody-based sandwich assay in a microfluidic microarray format was used to detect unlabeled human tumor suppressor protein p53 in crude lysates, without any purification step, with single-molecule resolution. The results are digital, enabling sensitive quantification of proteins with a dynamic range >4 orders of magnitude. For the conditions used, the efficiency of SAW-induced mechanical lysis was determined to be 12.9% ± 0.7% of that for conventional detergent-based lysis in yielding detectable protein. A range of possible loss mechanisms that could lead to the drop in protein yield are discussed. Our results show that the methods described here are amenable to an integrated point-of-care device for the assessment of tumor protein expression in fine needle aspirate biopsies

Association between proximal femoral geometry and incidence of proximal femoral fractures

Introduction: Recently, proximal femur geometry has been identified as a risk factor for hip fracture, and studies about the association of proximal femoral geometric indices with these fractures worldwide have reported inconsistent results. In this study, this association was studied in an Iranian population. Materials and Methods: In this case control study that was performed in Ayatollah Kashani Hospital in 1395 in Shahrekord, 81 patients with proximal femur fracture were trained with low energy and 83 healthy subjects over 50 years old. After recording the demographic data, the pelvic radiograph was taken and femoral neck width (FNW), femoral Shaft Diameter (FSD), femoral neck axis length (FNAL), hip axis length (HAL) and neck shaft angle (NSA) parameters were measured in both groups using orthopedic ruler. Data analysis was performed using stata software. Results: The mean age of case group (70.81±13.86 years) was significantly higher than control group (61.35±9.89 years) (P=0.00). Intrestingly, the mean height and weight of case group were lower than control group (P0.05). Conclusion: In this study older age, female sex, shorter heights, and less weight were associated with the incidence of proximal femoral fractures. Conclusively, FNAL, HAL, FSD, and NSA could not predict proximal femoral fractures in our samples. However, FNW reduction significantly increased the risk of femoral neck fractures in both male and female patient

Implementing Grover Oracles for Quantum Key Search on AES and LowMC

Grover's search algorithm gives a quantum attack against block ciphers by searching for a key that matches a small number of plaintext-ciphertext pairs. This attack uses $O(\sqrt{N})$ calls to the cipher to search a key space of size $N$. Previous work in the specific case of AES derived the full gate cost by analyzing quantum circuits for the cipher, but focused on minimizing the number of qubits. In contrast, we study the cost of quantum key search attacks under a depth restriction and introduce techniques that reduce the oracle depth, even if it requires more qubits. As cases in point, we design quantum circuits for the block ciphers AES and LowMC. Our circuits give a lower overall attack cost in both the gate count and depth-times-width cost models. In NIST's post-quantum cryptography standardization process, security categories are defined based on the concrete cost of quantum key search against AES. We present new, lower cost estimates for each category, so our work has immediate implications for the security assessment of post-quantum cryptography. As part of this work, we release Q# implementations of the full Grover oracle for AES-128, -192, -256 and for the three LowMC instantiations used in Picnic, including unit tests and code to reproduce our quantum resource estimates. To the best of our knowledge, these are the first two such full implementations and automatic resource estimations.Comment: 36 pages, 8 figures, 14 table

Evaluation of sesamum gum as an excipient in matrix tablets

In developing countries modern medicines are often beyond the affordability of the majority of the population. This is due to the reliance on expensive imported raw materials despite the abundance of natural resources which could provide an equivalent or even an improved function. The aim of this study was to investigate the potential of sesamum gum (SG) extracted from the leaves of Sesamum radiatum (readily cultivated in sub-Saharan Africa) as a matrix former. Directly compressed matrix tablets were prepared from the extract and compared with similar matrices of HPMC (K4M) using theophylline as a model water soluble drug. The compaction, swelling, erosion and drug release from the matrices were studied in deionized water, 0.1 N HCl (pH 1.2) and phosphate buffer (pH 6.8) using USP apparatus II. The data from the swelling, erosion and drug release studies were also fitted into the respective mathematical models. Results showed that the matrices underwent a combination of swelling and erosion, with the swelling action being controlled by the rate of hydration in the medium. SG also controlled the release of theophylline similar to the HPMC and therefore may have use as an alternative excipient in regions where Sesamum radiatum can be easily cultivated