bluuebunny/crossref_metadata_2025 huggingface dataset:
Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ ∼ 11.8 μm*
Authors: Wang Huan , Zhang Jin-Chuan , Cheng Feng-Min , Gu Zeng-Hui , Zhuo Ning , Zhai Shen-Qiang , Liu Feng-Qi , Liu Jun-Qi , Liu Shu-Man , Wang Zhan-Guo
Published: April 2021

We demonstrate a broad gain, continuous-wave (CW) operation InP-based quantum cascade laser (QCL) emitting at 11.8 μm with a modified dual-upper-state (DAU) and diagonal transition active region design. A 3 mm cavity length, 16.5 μm average ridge wide QCL with high-reflection (HR) coatings demonstrates a maximum peak power of 1.07 W at 283 K and CW output power of 60 mW at 293 K. The device also shows a broad and dual-frequency lasing spectrum in pulsed mode and a maximum average power of 258.6 mW at 283 K. Moreover, the full width at half maximum (FWHM) of the electroluminescent spectrum measured at subthreshold current is 2.37 μm, which indicates a broad gain spectrum of the materials. The tuning range of 1.38 μm is obtained by a grating-coupled external cavity (EC) Littrow configuration, which is beneficial for gas detection.
Magnetoelectric coupling effect of polarization regulation in BiFeO3/LaTiO3 heterostructures*
Authors: Jin Chao , Ren Feng-Zhu , Sun Wei , Li Jing-Yu , Wang Bing , Gu Qin-Fen
Published: April 2021

An effective regulation of the magnetism and interface of ferromagnetic materials is not only of great scientific significance, but also has an urgent need in modern industry. In this work, by using the first-principles calculations, we demonstrate an effective approach to achieve non-volatile electrical control of ferromagnets, which proves this idea in multiferroic heterostructures of ferromagnetic LaTiO3 and ferroelectric BiFeO3. The results show that the magnetic properties and two-dimensional electron gas concentrations of LaTiO3 films can be controlled by changing the polarization directions of BiFeO3. The destroyed symmetry being introduced by ferroelectric polarization of the system leads to the transfer and reconstruction of the Ti-3d electrons, which is the fundamental reason for the changing of magnetic properties. This multiferroic heterostructures will pave the way for non-volatile electrical control of ferromagnets and have potential applications.
Determination of the level of trace elements (copper, lead, cadmium, zinc) and the level of cholesterol and triglycerides in some frozen meat imported in Tikrit markets
Authors: M.Albashr Tariq Kh. , Ahmed Adnan Shakor , Khidir Zaid Khalaf
Published: April 2021

This study was conducted with the aim of identifying the chemical composition and pollution resulting in some heavy metals, as well as determining the level of cholesterol and triglycerides imported in eight types of imported meat in Tikrit markets. The results of the study showed that there were significant differences p < 0.05 in the humidity level, as it recorded the highest level of moisture in samples The sausage was 73% (%) compared to other samples, while protein and fat, as well as ash, had high rates. In this study, the element of lead (Pb), copper (Cu), cadmium (Cd) and zinc (Zn) showed the concentration of lead and copper in Gum and chicken liver have the highest proportions with a lead score of 3.81 3.74 (ppm) while copper (1.70, 2.92) ppm compared to other samples, as well as for camium and zinc, recorded high levels, and the highest level of cadmium was (2.46) ppm in chicken liver, while zinc recorded its highest level ( 4.97, 4.48) ppm in both chicken liver and meat burger, and cholesterol and triglycerides also recorded significant differences between samples used in the study p < 0.05 as the highest level of cholesterol (126.23, 127.40) reached in both sadomasochore and flesh couplers In other samples, the triglyceride level reached its highest level (113.50) in meat burger.
Effect of hookah smoking on some blood and biochemical parameters in serum of some men in Diwaniyah
Authors: Hussain Eman Mohammed , Hatem Rasha Muzahem
Published: April 2021

The current study was conducted with the aim of knowing the effect of hookah smoking on some blood and biochemical parameters in the blood serum of some men in Diwaniyah governorate, where the study was conducted in the laboratories of Diwaniyah Teaching Hospital for the period from 1/2/2020 until 1/4/2020. Of men whose average age was between (30-35) years, and they were divided into two groups:

- The first group (control) 10 people who did not use any kind of smoking.

- The second group, 30 people, who smoked hookah.

And after completing sample collection, general regulations (WBC, RBC, Hb, PCV) and biochemical standards (cholesterol, glycerides, and proteins)The results showed regarding the hematological parameters that hookah smoking led to a significant increase in the number of white blood cells, hemoglobin concentration and the volume of packed cells, while there was no noticeable difference in the numbers of red blood cells. As for the biochemical parameters of blood, there was a significant increase in The concentration of total cholesterol and triglycerides when compared with the control group. As for the low LDL and very low VLDL lipoproteins, there was a significant increase when compared with the control group, while there was a non-significant decrease in the level of HDL high-density lipoproteins when compared with the control. In blood pressure and a decrease in body weight in smokers when compared with non-smokers.
Pollution of aquatic plants with Lead and Cadmium by the effect of adding cities waste in Al-Diwaniyah River / Iraq
Authors: Jarallah Raid Shaalan , Al Husseini Huda Mahdi Haraj
Published: April 2021

This study was conducted to find out the effect of adding sewage and industrial water on the concentration of Lead and Cadmium elements in aquatic plants during different seasons of the year in Diwaniyah governorate / Iraq. Aquatic plant samples (Arundo and Ceratophyllum) were collected in three replications for all sites and during four seasons: summer (July) 2019, autumn (October) 2019, winter (January) 2020, spring (April) 2020, by three Sites where the first site is located at the entrance to the city of Diwaniyah (the Sania district), which represents the control treatment as it is located before the various pollution ports that pour into the river (such as sewage, hospital waste, factory waste, sewage … etc) and the second site in the city center (Rifaat quarter). The third site is in the Sudair district, which represents the last site of the city of Diwaniyah after the end of all the estuaries and sources of pollution. The results of the study found that the concentration of the two elements (Lead and Cadmium) in aquatic plants (Arundo and Ceratophyllum) increased with the increase of the river’s slope and the increase of the added pollutants. In the summer, the concentration of Lead in the Arundo plant was 6.79 μg.Kg−1, while its concentration in the Ceratophyllum plant was 7.80 μg.kg−1 in the third site and least in the winter season, for both plants, where the Lead concentration in the Arundo plant was 1.21 μg.Kg−1 and its concentration in Ceratophyllum plant is 1.52μg.Kg−1 in the first site. As for the highest concentration of Cadmium, it was in the summer also, it was 4.04 μg.Kg−1 in the Arundo plant, while it was 4.39 μg in the Ceratophyllum plant. in the third site and the lowest in the winter season, and for both plants, the Cadmium concentration in the Arundo plant reached 1.26 μg.Kg−1 As for its concentration in the Ceratophyllum plant, it was 1.43 μg.Kg−1 in the first site. The Ceratophyllum plant exceeded its absorption of Lead and Cadmium in all the studied sites and seasons.
Some Blood and Biochemical Parameters and Body Dimensions in Awassi Sheep
Authors: Abdel-Lattif Fallah Hassan , Al-Muhja Raed Kawkab
Published: April 2021

In this research, 15 heads of local Awassi ewes have been used to study the effect of animal age and body weight on some blood and biochemical parameters and body dimensions during 2019. The effect of the age of the animal has significantly (P <0.05) on hemoglobin concentration, eosinophils, total protein and globulin. The effect of body weight is significant (P <0.05) on the total number of white blood cells. The age of the animal and body weight has not affect the other blood and biochemical parameters (RBCs, PCV, Neutrophils, Basophils, Monocytes, Lymphocytes, Albumin, AST, ALT). The effect of body weight has significantly (P <0.01) in the breast circumference and (P <0.05) in the height at shoulder and body length, while the age of the animal does not affect the dimensions of the body. Determination coefficient for body weight prediction based on three measures of body dimensions is increased to 99% compared to two measures 91-97% and one measure 36-94%.
Effect distribution of plants and combination of fertilization (N. P. K) on some of growth, yield and its componant of safflower. (carthamus tintorius L.)
Authors: Jaffar Razaq Abd-Alrab , Al-Refai Shaimaa Ibraheem
Published: April 2021

A field experiment was conducted at AL-Diwaniyah city during the 2019-2020 winter seasons, to study the effect of the fertilizer combination of NPK and the distribution of plants on some growth, yield and yield components of safflower (Carthamus tinctorius L.) to determine the most appropriate amount of fertilizer combination and plant distance between plants. The experiment was arranged in split plot design based on RCBD, with three replications. Main plot included four levels of fertilizer combination are (F1, F2, F3, and F4), and sub plot included five plant distances as follows (D1, D2, D3, D4, and D5). The results showed a significant effect of the fertilizer combination. The treatment F4 gave the highest mean in plant height was 151.50 cm, seed yield per 118.6 g, total seed yield 4.89 tons. h−1, biological yield 15.15 tons. h−1 while for day to 75% flowering the treatment of F1 which was 153.95 day. As for the plants distribution, the treatment D1 which gave the highest mean in plant height was 157.00 cm, total seed yield 5.56 tons. h−1 and biological yield 19.94 ton.h−1, the treatment D5 gave highest mean of seed yield per plant was 145.70 g. For the interaction between the treatment, the combination of (F4 × D5) showed significant differences for day to 75% flowering and seeds yield per plant which were (148.97 day, 186.30 ton.h−1) respectively, and the combination of (F3 × D1) showed a highest mean for the total yield and biological yield which was (6.21 and 22.04 ton.h−1).
Effect Cadmium on living organisms
Authors: Mahdi Rasha Kadhim , Naji Noor Mahmmoud , Al-Mamoori Shaymaa O. H. , AL-Rifaie Zainab Imran , Ali Rasha Nayyef
Published: April 2021

Cadmium is one of the most toxic elements to humans, animals, plants and microorganism. In human Cadmium also has toxic effects on the skeleton, respiratory system and nervous system. In microorganism catalysts in enzymatic reactions and the regulation of osmotic balance, while in animal present cause a marked increase in blood pressure, blood iron deficiency, liver disease, and nerve and brain damage. Also found that lead to high mobility and toxicity at low concentrations in plants.
Response of Swiss chard cultivars (Beta vulgaris L.) to chelated Iron, nano Iron and Glomus mosseae
Authors: Ali Abbas Fadhil , Salim Hussein Ali , Bader Basem Rahem , Abed Asmaa Hussein
Published: April 2021

In order to investigate the effect of chelated Iron, nano Iron and Glomus mosseae on three cultivars of Swiss Chard (Beta vulgaris L.), a factorial experiment with two factors and three replications was conducted in the Directorate of Diyala agriculture, Baqubah nursery, Iraq during the season 2019-2020. The results showed that a superiority of the cultivar B. vulgaris 2 in a mean of the total yield (2715.2 g) followed by B. vulgaris 1 (2154.4 g) as compared with local cultivar B. vulgaris 3 (402.5 g), also B. vulgaris 2 was better than B. vulgaris 1 in increase of leaf area (first harvest, 384.7 cm) and (final harvest, 772.0 cm), whereas B. vulgaris 1 caused a significant increase in total chlorophyll 0.448 mg/g and carotene 9.7 μg / 100g compared to B. vulgaris 1. Chelated Iron, nano Iron and G. mosseae recorded highest significant in the mean of the total yield (1975.7 g), leaf area (final harvest, 706.1 cm), total chlorophyll (0.457 mg / g ) and carotene (9.9 μg / 100g ) as compared with control.
Effect of Foliar Application of Nano Nutrients and Amino Acids as a Complementary Nutrition on Quantity and Quality of Maize Grains
Authors: Alzreejawi Safa A. M. , Al-Juthery Hayyawi W. A.
Published: April 2021

In order to study the effect of foliar application of nano-NPK, nano-micronutrients, and nano-amino acids on the growth and yield of maize (Hybrid F1 Furat), a field experiment was carried out during the autumn season (2019) with an area of 1500 m2g within the district of (41)–Al-Husseiniyah / Al-Talea’a district / Babylon Governorate according to Randomized Complete Block Design (RCBD) for two factors with three replicates. The first factor (nano-NPK) included three treatments: control, nano-NPK (20-20-20), and nano-NPK (12-12-36), while the second factor (nano-micronutrients and nano-amino acids) included four treatments: control, nano-micronutrients, nano-amino acids, nano-micronutrients + nano-amino acids. The studied indicators on maize plant included estimation of nutrient absorption in grains and total absorption (kg H-1), estimation of fertilizer application efficiency (%). The results showed the significant superiority of NPK (12-12-36) spraying in achieving the highest averages of the studied indicators by an increase of (61.53%) in comparison with the comparison treatment for the total absorbed potassium, and an increase of iron and copper absorbed in the grains reached (3.938% and 22.321%), respectively, in comparison with the comparison treatment. And the application of the integrated nano-element fertilizer + nano amino acids achieved The highest averages of iron, manganese and copper absorbed in grains increased by (39.010%, 28.409%, 60.577%), respectively, comparing with the comparison treatment. and the interaction of the two study factors gave the combination of nano NPK (20-20-20) with integrated nano micro elements + nano amino acids the highest averages of nitrogen and phosphorus total absorption and for iron, manganese and copper with an increase of (110.06%, 81.83%, 64.251%)., 74.065%, 109.375%), respectively, by comparison with the comparison treatment. The highest nitrogen and phosphorous utilization efficiency was recorded at 55.12 and 36.65%, respectively, in comparison with high-potassium nano NPK, which corresponds to the combination of high-potassium NPK nano with nano (trace elements + amino acids) in recording the highest potassium utilization efficiency of 58.51% in comparison with the balanced nano NPK.
Effect of addition mineral, organic and bio-fertilizers on nitrogen, phosphorous, potassium concentration and protein of corn crop (Zea mays L.)
Authors: Al-Budeiri Montazer Hammadi , Oudah Al-Shami Yahya Ajib
Published: April 2021

A field experiment was conduct in Agricultural Research Office fields / Al-Dibuni Research Station in Wasit-at spring season of 2020 in Clay Loam soil. The study aim effect of different fertilizers types in nitrogen, phosphorous, potassium concentrations and protein content in corn. A Factorial Experiment Design was used, including three levels of phosphorous fertilizer DAP (0, 25, 50 KgP2O5ha-1) representing levels P0 P1 P2, two levels of organic fertilizer were 0, 4 ton ha−1 representing M0, M1 and two levels of bio fertilizer which were B0, B1 respectively, According to the RCBD design with three replications. Corn seeds class 106 (Zea mays L.) sowed in plots (2*2m2) at amount of (120 Kg seeds ha−1). The Results showed that mineral, organic and bio fertilizers addition individually affected significantly of nitrogen, phosphorus and potassium concentration in dry matter, grains and protein content also, as the level P2, M1 and B1 was the best concentration compared to level P0, M0 and B0 respectively. Results showed the double interactions factors M1B1caused a significant increasing in nitrogen, phosphorous and potassium concentration in the dry matter, with increasing percentage 111.94, 161.53 and 85.44% in sequence compared with control treatment, and the same treatment M1B1 significantly affected the concentration of nitrogen and phosphorus in the grains, with increasing percentage 120.91 and 86.36% respectively, Comparison with control treatment, also noticed M1B1 treatment had a significant effect on protein content, with an increase percentage 121.46% compared to control treatment. Results showed the triple interactions P2M1B1 achieved affected significantly in nitrogen, phosphorus and potassium concentration in dry matter and grains, with increased percentage 142.86, 208.33 and 112.00%, respectively, compared with control treatment in dry matter, with increases of 145.33, 109.52 and 92.96% respectively compared with control treatment in grains. Results showed, that P2M1B1 treatment achieved affected significantly in protein content, with an increase percentage 144.68% compared to control treatment.
Evaluation and Biological properties maps of Gypsiferous Soil using Geomatic techniques, Tikrit city, Salahaldin, Iraq
Authors: Khalaf Ayad Abdullah , Ismaeal Ammar S. , Altai Salahaldeen H.
Published: April 2021

This study was conducted to prepare a map of the biological properties in the gypsiferouse soil using geomatic techniques at the Tikrit city site. (20) soil samples of the surface layer of gypsum soil were collected randomly according to differently in the nature of agricultural exploitation as survey study. Analyses and measurements of physical (texture and bulk density) and chemical characteristics were carried out: pH, EC, O.M, CaSO4.2H2O and the bacteria and fungi numbers were estimated by methods Certified in the laboratory. Used satellite Images acquired at 24Feb.2019 and 20sep.2019 were used and processed digitally and calculated the following vegetation indicators as follows: NDVI, OSAVI, LAI and LST. Maps of the biological properties (Bacteria and Fungi) were prepared using the Kriging interpolation according to The Spheroidal Model in the ArcGIS Ver environment.10.2. The show results the effect of gypsum content in the bacteria and fungi with the R2 (0.75 and 0.79). The results reached the importance of indices in evaluating the state and activity of bacteria as a positive regression relationship between the NDVI, LAI and OSAVI with the numbers of bacteria and fungi range (0.49-0.80) and were negative regression with the earth’s surface temperature LST. Therefore, spectral indices has proved important in spatial forecasting of the distribution and activity of organisms and the control of seasonal changes in soil surface.
Effect of planting distances and varieties on the yield of three cucumber hybrids (Cucumis sativus L.) using drip irrigation under protected cultivation conditions
Authors: Kakahy Amer N. N. , AL Shamary Wael F. A. , Kakei Ayad A.
Published: April 2021

A field experiment was carried out in one of the plastic houses of the College of Agriculture, University of Kirkuk during the 2018-2019 agricultural season, to study the effect of three cultivation distances and three cucumber hybrids Cucumis sativus L. hybrids and their interaction on some of the characteristics of the cucumber plant using the drip irrigation system under protected cultivation conditions. The experiment included 18 treatments that consisted of matching three hybrids of cucumber (FAEQ F1, DALIA F1, and BARQ F1) with three distances between plants (40, 30, 20) cm. A factorial experiment was carried out according to the design of randomized complete sectors (R.C.B.D) and by the split plates method and with three replications. The significance of differences between the averages was tested according to the least significant difference L.S.D. between the arithmetic means and at a probability level p < 0.01 and p < 0.05. The results showed the significant effect of most of the studied treatments. It gave the highest significant value for the treatment of interaction between cucumber varieties and the interaction between V3D1 and V3D2 in characteristics of plant height and percentage chlorophyll in the plant, which reached (3.197 m plant−1 and 57.283%), respectively.
Genetic Parameters of Some Conformational Traits in Iraqi Arabian Horses
Authors: AL-Khauzai Allawi L. D. , Towfik Amir I. , Munahi Ahmed K.
Published: April 2021

This study is conducted in a private farms in Al-Diwania and Al-Najaf Provinces by using 46 progenies(both 28 males and 18 females) belong to 5 stallions. Their ages ranged from less than 2 years to 6 years and over at the time of measurements, 14 morphological traits are taken: Withers height(WH) After withers height (AWH)Croup height (CH), Middle back height (MBH), Hip height (HH) Buttock height(BH) Dock height(DH) Body length(BL), Scapula length(SL), Arm length (AL), Croup length (CL), Shoulder joint angle (SJA), Elbow joint angle (EJA) and Croup angle(CA). All conformational trait measuremens have been collected between March and June( 2019) by the same trained qualifier using a horse measuring stick, and goniometer. The results obtained of the current study can be summarized as follow :The females are significantly (P ≤ 0.05) higher than males in WH, MBH, BL, CL and CA measurements. Generally all measurements of females are higher than males. The results indicate there are highly significant (P ≤ 0.01) effect of age on all body measurements of horses, the horses of age 6 years and over have inquired higher measurements comparison with other ages. The horses with age less than two years have lowest measurements. The means of body measurement for horses with 6 years and over are 142-88 (WH), 141.04 (AWH), 144.6 (CH), 140.69 (MBH), 139.11 (HH), 135.54 (BH), 138.11 (DH), 156.11 (BL), 52.69 (SL), 43.50 (AL), 38.77 (SL), SJA (47.38), EJA (34.54) and CA (47.69) respectively. The results appear that the sires had an important source of variation, there are significant differences between the different body measurements of the sire’s sons the estimates of heritability ranged from 0.002 for SL to 0.80 for BL. The highest value of heritability for BL is (0.80), CH (0.74), EJA (0.7) and is (0.52) for WH, The values of genetic and phenotypic correlations are highly significant (P ≤ 0.01) and ranged from (0.40-0.97) and from (0.41-0.99). Simple correlation coefficients are found between BL and WH, BL and CH and WH and CH which are 0.735, 0.717, 0.907 and 0.69, 0.69 and 0.91 respectively. The highest breeding value is 2.932 for the BL and the lowest is -4.606 for BH.
Repellent of the stray animals
Authors: Atheeb Maysoon Mahdi , Ethaeb Ali Mahdi , Salman Mudhafar Dawood
Published: April 2021

The ultrasound frequencies are still receiving a lot of interest by scientists and researchers. It is used in many areas of life, especially medicine, where it was used in the diagnostic and therapeutic side. And also, it is used in the field of industry and other fields of life. The ultrasound frequencies cannot be heard by humans, but most animals hear them, especially dogs. Ultrasonic frequencies cause inconvenience in dogs. In this study, a modified device was made and used to eliminate dogs from cities and neighborhoods. The modification was of some electronic circuits in the available devices (available in the local markets) to generate ultrasound frequencies. The modified device was carried and switched off-on in multiple areas around cities and countryside and applied near groups of dogs in order to see the influence of the switch on (producing ultrasound frequencies) of the device on animals. The use of the new technique results in expel animals and dogs away from the areas of wave centers. Therefore, this technique can be used against predators such as pigs and wolves in rural areas, especially as it has spread widely at present.
Climate variability (temperature, humidity, rain intensity and wind speed) and dengue hemorrhagic fever case correlations in Depok City in 2009-2018
Authors: Sugardo B N , Sintorini M M , Kusumadewi R A
Published: April 2021

Climate issues caused by industrial pollutant has affected the spread of vector-borne diseases such as Dengue Hemorrhagic Fever (DHF). DHF cases are suspected to have links with the everchanging environmental climate conditions. Using an ecological design-based study, this research aims to determine the correlations between climate variability and the DHF cases at Depok City in a time period from 2009 to 2018. This study utilizes secondary data in which DHF cases were collected through the records of Department of Health of Depok City, and temperature, humidity, rain intensity, and wind speed from Depok City Meteorological, Climatological, and Geophysical Agency. Analytical method consists of univariate analysis and bivariate analysis which is shown by a correlation value and linear regression between the variables. Results revealed that there was a significant relationship between temperature and the number of DHF cases (p-value = 0.023, r = - 0.645) and also between humidity and the number of DHF cases (p-value = 0.016, r = 0.673). No significant correlations were found within rain intensity and wind speed variables. In conclusion, this study showed that the effects of climate temperature and humidity changes also affect the rise and declining number of DHF cases in this study location.
Designing knowledge sharing systems to support integrated eco-city planning and management
Authors: Supriana C E
Published: April 2021

The local government of a city as an organization depends on decision makers in government management to support the vision and mission of the city to achieve eco-city goals based on data and information from several knowledge domains. Knowledge management is seen as an increasingly important scientific discipline that encourages the creation, sharing and utilization of knowledge in an organization. Knowledge management is also related to the concept of intellectual capital, the most valuable organizational resource. Knowledge sharing systems are designed to help decision makers and stakeholders share their knowledge. Most knowledge management systems in organizations are designed to share the explicit knowledge of individuals, organizations and finally distributed to the community. This research is the approach in the development model that can be used in the governance to achieve eco-city goals. Complex knowledge about eco-cities requires policies that are based on current knowledge and can be implemented immediately with a thorough understanding of all aspects. The results of this study are understanding the problem of knowledge sharing as a valuable organizational asset, designing a knowledge sharing systems model, and improving systems to improve the quality of knowledge.
Performance of sea sponges micro symbionts as a biomaterial in biodegradation naphthalene waste of modified
Authors: Marzuki I , Sinardi S , Pratama I , Chaerul M , Paserangi I , Mudyawati M , Asaf R
Published: April 2021

The purpose of this research is to understand sponge species, micro symbiont, performance, mechanisms, and types of compounds resulting from biodegradation. The analytical method is applied by selecting the model, results from characterization and morphological identification, phenotype, genotype. Selected of micro symbiont are made as suspensions, interacted with modified naphthalene contaminated waste. The biodegradation process using the Bacillus Sp (BS) isolates sponge Neopetrosia Sp and Acinetobacter Calcoaceticus (AC) isolated from sponge Callyspongia Aerizusa, was carried out by interacting a microscopic suspension of 5,000 mg/L naphthalene waste for 25 days. Micro symbiont biodegradation results by determining the concentration of contaminants and biodegradation products, in the form of pure organic compounds using GC-MS, and the analysis of functional groups of natural components using IR. Destruction of the naphthalene molecule occurs through an enzymatic reaction mechanism, observed based on visible parameters. The performance of BS symbiont biodegradation on naphthalene is in the range of 7.34% - 51.37%, while the AC range is 5.84% -37.26% in w/v, achieved within 5-25 days interaction. Biodegradation products based on functional groups were identified as compounds of aldehyde, ketone, carboxylic acids, esters, alkanes. Observation of biodegradation parameters confirmed pH changes, increased optical density values, gas bubbles formed and the smell of fermentation.
Is an Indonesia the right investment environment after Covid-19?
Authors: Basmar E , III C M Campbell , Basmar E
Published: April 2021

Covid-19 has influenced the investment environment throughout the world, including in Indonesia, by influencing the financial cycle (interest rates and exchange rates). This research aims to determine changes in the investment environment influenced by changes in interest rates and exchange rates in Indonesia. The novelty of this research is because there is relevance to economic conditions around the world, measurement techniques use several methods of measuring the financial waves to determine accurately changes in the investment environment, the measurement results are presented using a quantitative approach. The type of data used is secondary data obtained from the official website of Bank Indonesia and several related agencies such as interest rates, exchange rates and investments from 2019- 2020Q2. This research uses multiple linear regression, using IBM SPSS 23, for significant results through variable relationships. The results of this research indicate that partially the interest rate and exchange rate has a positive and significant effect, while the interest rate and the exchange rate simultaneously have a significant effect on investment. The implications of this research show that Indonesia is a good investment environment, despite financial fluctuations due to the Covid-19 pandemic.
Phosphate distribution model of Cipicung River water affected by Sarimukti Landfill Leachate Discharge
Authors: Yustiani Y M , Pradiko H , Nazarudin M
Published: April 2021

This study aims to develop a phosphate distribution model up to the calibration stage in the Cipicung River. The model was simulated to determine the distribution of phosphates using a volume control approach so that the river is likened to an elongated reactor divided into several segments. Pollutant load entered is considered to be point source so the model does not take into account other loads that enter the river. Based on the results, the deviation or an error made in the calculation of the initial model at a distance of 40 m from the leachate outlet is 1.9%. The error results obtained in the calculation of the initial model are quite large; this is due to several factors that exist in the components of the model. The component model that influences the magnitude of the error is the decay rate (k). In the calibration process the model components that affect the magnitude of the error can be varied to find the best fit for the data in the field. The variations of k value were 10, 13, 15, 17 and 20/day. The closest model to the conditions in the field is using k value of 15/day with an error of 0.013%.
The laboratory analysis for water absorption of sandy soil from three different quarry
Authors: Soehardi F , Hakam A , Rendy T , Mera M
Published: April 2021

The research objective was to determine the water absorption and gradation of three types of quarry originating from Pandau, Garuda Sakti and Teratak Buluh. This research is basic research to provide property data of sand soil commonly used in Pekanbaru a construction material. This study uses experiments in the laboratory by testing the Specific Gravity (SNI-03-1964-1990), testing the Moisture Content (SNI 03-1965-1990), and Testing the Filter analysis (SNI-03-1968-1990). Based on the test results obtained that the sand soil from Pandau quarry has a high water absorption value compared to sand soil from the quarry Garuda Sakti and Teratak Buluh. The soil condition needs to be further handled by making repairs or strengthening if it will be used construction material.
Community resilience to face flood disaster in the Baleendah Village, Bandung Regency, Indonesia
Authors: Nurwulandari F S , Rismana G A
Published: April 2021

This study aims to determine the level of resilience of the people of Baleendah Village in dealing with floods. This research uses a holistic approach that considers all aspects as a whole. The approach known as mixed research methods. The mixed research method strategy used is concurrent triangulation strategy, where researchers collect qualitative and quantitative data together, then compare the two data to find out the difference or a combination. The community resilience variable used in this study refers to guidelines for measuring disaster resilience issued by GOAL (2015) that has 30 variables that are grouped into 5 thematic areas. These variables include knowledge and education; emergency preparedness and response; and risk management and vulnerability reduction. Based on the analysis of 3 variables and 10 aspects of community resilience, it can be concluded that the Baleendah Village community currently has a resilience level at the “RESILIENT” level, which means that the community can adapt and have a solution to overcome the floods. Based on the study findings, there are two main problems in increasing the resilience of the Baleendah Village community, namely access to financial assistance for people who are economically in the low income community category, and sanitation.
Passengers services preferences on Jakarta MRT phase I (Lebak Bulus to Hotel Indonesia)
Authors: Wardhani W S , Situmorang R , Levara J C , Taki H M
Published: April 2021

MRT is one of public transportation which create reliable and affordable services to its passengers. Passengers of public transportation are the most entitled to measure the quality of service, since the transportation service provider should understand their consumer preferences. Aim of this research is to identify the Jakarta MRT passengers services preferences and what they will need in the future. Data collected using questionnaires which distributed by Google forms to passengers and analyzed by Customer Satisfaction Index (CSI) and Importance Performance Analysis (IPA). As results, the services for MRT passengers is satisfied and found some indicators which lack of performance to be improved, namely: availability of other modes service to/from stations, affordability of MRT rates and the convenience of pedestrian facilities.
Housing parks utilization behaviour based on income group in Jabodetabek area
Authors: Cantika C , Wiranegara H W , Luru M N
Published: April 2021

Housing parks are one of the shared facilities in planned housing. Its function is to support the quality of life and social sustainability. To create a sustainable housing park needs a pattern of utilization behaviour of its inhabitants. The aim of this study is to identify housing park utilization behaviour based on their level of income. This research is quantitative by using a survey-questionnaire method. Samples are the users of housing parks in the Greater Jakarta area. The unit of analysis is the household from a different level of income. The number of samples was determined using the Lemeshow formula of 96. The results show that the higher income the lower frequency, duration, and intensity of using parks with significant results. There is a contradiction between the provision and the utilization of parks. The better condition of the higher income housing park, the lower of its utilization. For the low-income with a limited area of his unit, they use parks more frequently, long and intensive. The more spacious residential space, the less frequent residents use housing parks because housing facilities are much better in accommodating the various activities of household members. It is necessary to consider the utilization behaviour of the residents in providing housing parks.
Community gardening and the capacity to enrich social bonding in urban neighborhoods
Authors: Sharif S M , Ujang N
Published: April 2021

This paper argues that the selection of the type of urban green spaces to be integrated into urban neighborhoods is critical in addressing these well-being problems. One of the drivers is the urban migration, where people are relocating themselves to new neighborhoods, cities or countries often with the hope of better economic opportunities and social infrastructure, therefore changing the landscape of the new society and the place they reside. It is worrying as these people might not receive enough social support due to their limited social network. It could further escalate to social well-being problems such as individualism and social isolation and could later be manifested mentally or psychologically as loneliness. Community gardens, as part of urban green spaces, offer meaningful social interaction opportunities that often being missed in the context of modern societies and urban lifestyle. Therefore, there is a need to review the effects of community gardening activities as an intervention strategy to strengthen the degree of social bonding to identify its capacity in integrating isolated people back into community life. As a conclusion, urban designers and policymakers are suggested to adopt community gardens as a safe open space in cities to encourage more people-people-places interaction.
The effect of housing policies on housing segregation in Indonesia
Authors: Wiranegara H W , Situmorang R , Safitri G , Dewi R C P , Maharaniputri S , Haridza T Q
Published: April 2021

Housing segregation has occurred in urban areas in Indonesia. Spatial segregation is shown by the phenomenon of gated community and social segregation is indicated by the absence of social relations among the groups. This housing segregation endangers the unity and integrity of the community. It is far from the ideal goal in housing development, i.e. to create harmonious community. This problem can be caused by the housing policies. Therefore, this study aims to identify housing policies that affect housing segregation in Indonesia. The methods used in this study were: 1) compose the conceptual framework of the emergence of segregation based on the results of the research article review; 2) collecting policy texts in the form of laws and regulations at the national level (constitution, government regulation, and ministerial regulation) for the past ten years; 3) review and map the contents of the policies following the conceptual framework; 4) analyze the mapping and look for policies relating to segregation. The results of the policy mapping show that although there are many policies to increase housing affordability and harmonious housing (diversity and balance), there is a clause in a balanced housing policy which states that the construction of simple housing for low-income groups may not be in the same location with the moderate and luxury housing has triggered the emergence of spatial segregation. Thus, it can be concluded that housing policy influences the occurrence of housing segregation in Indonesia.
Bacteriological air quality at transfer station area (case study: Gegerkalong Transfer Station, Bandung City)
Authors: Hasbiah A W , Nugroho F L , Juliana J
Published: April 2021

This study aims to measure air bacteriological concentration, to determine the effect of temperature, humidity, and wind speed on bacteriological concentration, and to identify the genus of bacteria found around Gegerkalong waste transfer station. Sampling of air bacteria at stations was based on a radius of 0, 10, 30 and 60 meters East, West, South and North of the transfer station at 09:00, 12:00 and 18:30 with 3 replicates. The method used to measure the concentration of air bacteria was the settling plate method. The results showed that maximum concentration of air bacteria found around the transfer station area was 67626 cfu/m3 and the minimum was 1153 cfu/m3 for agar nutrient media. Referring to the quality standards of the UK Environmental Agency, bacterial concentration in Gegerkalong waste transfer station exceeds the bacterial concentration standard of 1000 cfu/m3, whereas Coliform bacteria were below the standard. Bacteria found in the air around the transfer station are Pseudomonas, Klebsiella, Shigella, Alcaligenes, Salmonella, Escherichia, Bacillus, Staphyloococcus and Coliform. These can be concluded that a transfer station can be a source of airborne bacteria dispersion, which can have an impact on the surrounding community.
Effect of pH on metal mobility in the soil
Authors: Sintorini M M , Widyatmoko H , Sinaga E , Aliyah N
Published: April 2021

pH is a parameter that can be used to estimate the mobility of chemical elements in the soil and can be used to measure the level of toxicity and soil pollution. The purpose of this study is to prove how far the influence of pH on metal mobility in the soil. Method that used in this study, 35 samples each 1 kg were taken from the soil profile in Cilengsi Bogor and then dried at room temperature. From each sample 20 grams were taken for pH and Eh measurements. The result of this study that the analysis showed a significant correlation between pH and Eh with r = 0.888. Although the samples are heterogeneous or come from different soils, there is still a positive correlation between metal concentration and pH (pH-Mn = 0.12; pH-Cd = 0.0058; pH-Pb = 0.39). This means that for homogeneous samples, the correlation between pH-metals will be more significant. Eh and soil pH variations depends on the activity and decomposition of carbon by plants and microorganisms. Therefore, it can be ideally be concluded that the topsoil Eh is higher than the bottom Eh. The aerobic-anaerobic boundary is at around 300 mV.
Analysis of kitchen organic waste for processing using Black Soldier Flies in Kecamatan Cibiru, Bandung, West Java
Authors: Rochaeni A , Ismaria R , Fanira S
Published: April 2021

Black Soldier Flies (BSF) is a type of fly that is larger than ordinary flies and is famous for its ability to consume and reduce organic waste, especially kitchen organic waste (KOW). KOW processing using BSF will be carried out in Kecamatan Cibiru, Bandung City, so the characteristics of KOW produced by the community need to be analyzed. The number of samples is calculated based on SNI M 36-1991 on Method of Taking and Measuring Example of Formation and Composition of Municipal Waste, obtained 63 households, which are then divided into 3 income groups. Results show the average KOW generation in populations with high, medium and low incomes are 0.223, 0.153, and 0.103 kg/person/day, respectively. Based on the speed of consuming KOW by BSF where the composition of KOW is divided into 3 categories, the results are obtained that 47% KOW is consumed quickly, 29% KOW is consumed slowly, and 24% KOW is not consumed. It was also found that the high income population turned out to contribute the highest fast eaten KOW compared to the middle and low income population. This turned out to be influenced by cooking patterns and patterns of handling leftovers.
Information technology in monitoring the health of Stavropol State Agrarian University students in the environmental conditions
Authors: Tarasova S I , Dukhina T N , Limonova O O , Chudnova O A , Chvalun R V
Published: April 2021

The article discusses the features of the influence of the environmental situation on the state of human health. We revealed the necessity of monitoring students’ health with the use of information technologies as a factor influencing the training of future specialists and thereby improving the quality of education. The factors of optimization of the processes of preserving and strengthening the health of students of Stavropol State Agrarian University are determined. The tasks of the research are described, which consist in obtaining psychological information from monitoring the state of health of students, characterizing the educational process at the university, thereby ensuring the structuring of the system of psychological and pedagogical corrective measures.
Evaluation of the results of exploitation of directional wells in underground gas storage
Authors: Verzhbitsky V V , Gunkina T A , Verzhbitskaya V V , Khandzel A V , Prachev Y N
Published: April 2021

The article presents an assessment of the effective use of directional wells as a way to increase the productivity of underground gas storage. It analyzes the solutions to the problem of gas inflow to a horizontal well based on the use of a flat model of filtration flows. Evaluation of the efficiency of operation of directional (horizontal) wells was carried out using the example of the Kushchevsky underground gas storage.
Damage to the Vertical Braces of Industrial Buildings
Authors: Krahmalniy T A , Evtushenko S I
Published: April 2021

The article describes the types of vertical connections of industrial buildings, presents the results of surveys, describes typical defects: bends of the connecting grid, cutouts of elements, local bends and curvature of branches of connections, destruction of attachment points. The description of unique damages of vertical connections is given: cut branches of connections, fastening of connections to crane beams, change of the design decision of connection. In conclusion, the analysis of zones of formation of defects and grouping of defects by zones of formation is performed.
Perspective Directions of Renovation of Industrial Enterprises on the Example of Khabarovsk City
Authors: Putilov I D , Bazilevich M E
Published: April 2021

The article is devoted to the problems of renovation and functional re-profiling of industrial facilities of the Soviet industrialization period. On the example of the city of Khabarovsk, the possibility of revitalizing the territories of the Dalenergomash, Daldizel, Splav and Amurkabel factories, which at one time were the largest industrial enterprises in the region, is considered. An excursion into the history of these enterprises is given, their current state is considered, promising directions for the development of these objects and their territories are identified. Special attention is pays to the study of Russian and foreign experience in the renovation of industrial enterprises, which can be used in the Far East. As a result, the authors propose recommendations for possible renovation of industrial heritage sites in the city of Khabarovsk, taking into account the existing urban planning and economic situation.