Clinico-radiological evaluation of oligohydramnios with special reference to pregnancy outcome

Background: Oligohydramnios is defined as amniotic fluid index of less than 5cm. It is thought to be associated with increased fetal and maternal morbidity. Studies are not clear whether the adverse perinatal outcome merely reflects the sequel of other conditions or if, reduced amniotic fluid volume itself contributes to adverse outcomes.Methods: A total of 150 pregnant women with gestational age >34 weeks having clinically diagnosed oligohydramnios were enrolled in this observational prospective clinical study, during the study period of 12 months,1June 2020 to 31May 2021. Patients were first subjected to ultrasonographic AFI estimation, divided into two groups (oligohydramnios and borderline AFI) and then followed up for maternal and fetal outcome. Data was statistically analyzed.Results: A total 72.66% had AFI less than 5 cm. 97 (64.66%) were primigravida. 68% were prepared for Caesarean section irrespective of gestational period, the most common indication being fetal distress. 66.66% babies had good APGAR score at 1 minute after birth.41.06% delivered babies who required NICU admission, although only 2% neonatal deaths were recorded.Conclusions: Our study shows that isolated decreased AFI after 34 weeks of gestation is associated with satisfactory perinatal outcome. Both groups in the study, when compared statistically, were relatively similar in their pregnancy outcome. Significant association was found between oligohydramnios and increased rate of caesarean section, NICU admission and abnormal fetal heart rate tracing.

Comparison of efficacy of visual inspection with 4% acetic acid, visual inspection with Lugol's iodine, Pap smear and colposcopy in screening cervical precancerous lesions

Background: Cervical malignancy is the fourth most common cancer in women worldwide. Screening of high-grade cervical intraepithelial neoplasia aids in early detection and their effective treatment which constitutes the most effective and widely used strategy to prevent cervical carcinoma throughout the world. Objectives of the study were to: screen women with visual inspection with 4% acetic acid (VIA), visual inspection with Lugol's iodine (VILI), Pap smear and colposcopy who have abnormal symptoms for unhealthy cervix; and to evaluate the sensitivity and specificity of VIA, VILI, Pap smear and colposcopy.Methods: This was a hospital based cross sectional study conducted at Jorhat Medical College, Assam at the department of obstetrics and gynaecology from June 2020 to May 2021, carried out on 60 women. This study was done on 60 women who fulfilled the inclusion and exclusion criteria, were first subjected to Pap smear followed by VIA, VILI, colposcopy and biopsy for confirmation of lesion, if needed. Data was obtained and statistically analyzed.Results: VIA showed sensitivity 96.15%, specificity 62.50% and diagnostic accuracy 88.23%. VILI showed sensitivity 89.65%, specificity 40% and diagnostic accuracy 82.35%. Colposcopy showed sensitivity 96.66%, specificity 25% and diagnostic accuracy 88.23%. Pap smear showed sensitivity of 86.66%, specificity 75% and diagnostic accuracy of 85.29%.Conclusions: Our study shows that VIA, VILI, Pap smear and colposcopy has comparable sensitivity. Pap smear shows better specificity. Therefore, use of combination of these tests gives better sensitivity and specificity for early detection of cervical carcinoma.

An Adaptive Non-linear Statistical Salt-and-Pepper Noise Removal Algorithm using Interquartile Range

This paper presents a salt-and-pepper noise removal scheme using modified mean filter. The proposed method is based on a simple basic concepts of mean filter, where each mean value is calculated from the mathematical formula of interquartile range (IQR). It replaces the noisy pixels using IQR based mathematical formula applied on the filter window. Experimental results are presented to demonstrate the efficiency (quality of the image) of the method compared to other existing different types of impulse noise removal techniques

A Novel Approach for Room-Temperature Intersubband Transition in GaN HEMT for Terahertz Applications

Terahertz (THz) technology has attracted tremendous attention recently due to its promising applications in various domains such as medical, biological, industrial imaging, broadband, safety, communication, radar, space science, and so on. Due to non-availability of powerful sources and highly sensitive and efficient detectors, the so-called THz gap remains largely unfilled. Despite seamless efforts from electronics and photonics technology researchers, the desired level of technology development to fill the THz gap still remains a challenge. GaN-based HEMT structures have been investigated as potential THz sources and detectors by a number of researchers. This chapter presents a very new and versatile mechanism for electrical tuning of intersubband transitions (ISBT) GaN high electron mobility transition (HEMT) devices. ISBT phenomena are usually demonstrated in photonic devices like a quantum cascade laser (QCL). Here we explore ISBT in an electronic GaN HEMT device. Conventional photonic devices like a QCL are operated at cryogenic temperature to minimize thermal effect. Tuning the conduction band through external gate bias is an advantage of an HEMT device for room temperature (RT) THz applications. This chapter demonstrates the theoretical and experimental novel ISBT phenomenon in GaN HEMT is for potential ambient applications in the THz range

Efficacy of pre- and post-emergence herbicide combinations on weed control in no-till mechanically transplanted rice

No-till mechanized-transplanted rice was evaluated for different combinations of pre- and post-emergence herbicides to determine feasible, economically viable weed management options to control complex weed flora in rice fields. All pre-emergence herbicides significantly reduced the population of grassy weeds; of these, pendimethalin resulted in the greatest reductions (83%) at 15 days after transplanting (DAT). Among five post-emergence herbicide treatments, the combination of bispyribac-sodium (10%SP) + pyrazosulfuron (10%WP) was found to be the most effective in controlling all weed flora at both 35 and 55 DAT. The sequential application of pendimethalin (pre-emergence) followed bispyribac-sodium + pyrazosulfuron (post-emergence) resulted in significantly higher rice grain yield (4.4 t-ha−1) and relative gross-margin (417 USD-ha−1) than all other treatments. A strong negative correlation was observed between rice grain yield and weed biomass, and a strong positive correlation between rice grain yield and weed control efficiency. Our findings demonstrate the potential to combine pre- and post-emergence herbicides in no-till mechanized-transplanted rice; these findings have applications globally in regions where rice is established by no-till or mechanized transplanting

One-pot reductive acetamidation of aryl nitro compounds

The present invention provides a method for the reductive acetamidation of an aryl nitro compound by reacting a substituted acid with an aryl nitro compound and adding a catalytic amount of a base with the substituted acid and the aryl nitro compound to form an acetamidation aryl nitro compound. The acetamidation aryl nitro compound is then purified.U

One-pot reductive acetamidation of aryl nitro compounds

The present invention provides a method for the reductive acetamidation of an aryl nitro compound by reacting a substituted acid with an aryl nitro compound and adding a catalytic amount of a base with the substituted acid and the aryl nitro compound to form an acetamidation aryl nitro compound. The acetamidation aryl nitro compound is then purified.U

An Adaptive Non-linear Statistical Salt-and-Pepper Noise Removal Algorithm using Interquartile Range

This paper presents a salt-and-pepper noise removal scheme using modified mean filter. The proposed method is based on a simple basic concepts of mean filter, where each mean value is calculated from the mathematical formula of interquartile range (IQR). It replaces the noisy pixels using IQR based mathematical formula applied on the filter window. Experimental results are presented to demonstrate the efficiency (quality of the image) of the method compared to other existing different types of impulse noise removal techniques