Earticle

In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated for an indirect injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenate additive blended fuel which has four kinds of mixed ratio. Ethylene glycol mono butyl ether(EGBE) contains oxygen component 27% in itself, and it is a kind of effective oxygenated fuel of mono-ether group that the smoke emission of EGBE is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficiently at higher loads in a IDI diesel engine.

본 연구의 목적은 최근의 장교 지원율 하락에 따른 장교획득 수준의 시대적 심각성을 반영하여 장교 양성과정에서 핵심적 인 역할을 수행하고 있는 일반대학 군사학과의 운영 수준을 상대적인 평가, 분석을 바탕으로 실증적 연구를 통하여 확인해 보 고 개선을 위한 의미있는 결과를 확인하였다. 육군과 협약, 준협약을 통하여 운영되고 있는 일반대학 군사학과는 11개이며 대 학별 군사학과 운영을 위해 투입되는 자원입력과 성과관점에서 자료포락분석법(DEA, Data Envelopment Analysis)을 적용하 여 상대적인 효율성을 분석하고 개선을 위한 구체적인 방향을 확인하였다. 운영 효율성 분석결과, 11개 DMU 중에서 BCC모 델의 경우 6개 대학이 효율적인 것으로 나타났고 자료포락분석 방법을 통하여 효율적, 비효율적인 집단에 대한 구분을 통해 평가결과를 확인해 볼 수 있었다. 본 연구는 상대적인 효율성을 평가하는데 여러 개의 평가요소를 한꺼번에 반영하여 초과, 부족한 부분을 나타내는 DEA-Additive모델을 통해 비교대상 대학 군사학과들의 상대적인 측면에서 효율성을 확인하고 발전 을 위한 구체적인 정보를 확인한다는 점에서 실용적 가치가 있을 수 있다.

The purpose of this paper was to confirm the operational level of the military department of universities, which plays a key role in the officer training process, through empirical research and confirm meaningful results for improvement. There are 11 university military departments operated through the Army, agreements, and semi-agreement, and the Data Envelopment Analysis (DEA) was applied from the perspective of resource input and performance for each university's military department operation to analyze relative efficiency and confirm specific directions for improvement. As a result of operational efficiency analysis, 6 DMUs (Decsision Making Unit) were found to be efficient in the BCC model out of 11 DMUs, and the evaluation results could be confirmed through classification of efficient and inefficient groups through data capture analysis. This paper may be of practical value in that it checks the efficiency of the comparative university military departments and confirms specific information for development through the DEA-Additive model that reflects several evaluation factors at once. Through this, the operators of each university's military department are admitted.

우리나라 전체 방송사업매출액이 증가하고 있는 상황에서 지상파방송사업자의 매출액은 정체되는 반면 후발 진입자인 종합편성 방송채널사용사업자의 매출액은 증가하고 있다. 본 연구는 이러한 상황에서 3개 중앙 지상파방송과 4개 종합편성방송의 상대적 효율성과 초효율성을 분석하여 시사점을 도출하는 것을 목적으로 한다. 이를 위해 본 연구에서는 2012년부터 2019년까지의 투입 및 산출 자료를 활용하였으며 상대적 효율성을 측정하는 DEA 모형 중에서 비방사형 모형인 Additive DEA와 Additive Super-efficiency DEA를 사용하였다. 분석에서는 규모의 경제가 존재하는 방송산업의 특성을 반영하여 가변규모수익(VRS)을 가정하였다. 분석결과, 유형자산의 투입여유분이 중앙 지상파방송의 효율성을 감소시키는 가장 두드러진 비효율의 원인으로 나타났으며 종합편성방송은 유형자산의 투입여유분과 매출액의 산출여유분에서 비효율의 원인이 발생하였다.

While total sales of broadcasting business have been increasing, terrestrial broadcasters' sales are stagnant and comprehensive programming program providers(PPs)' sales are increasing. The purpose of this study is to derive implications by analyzing the relative efficiency and super-efficiency of domestic broadcasters in such an asymmetric situation. In this study, we use input and output data of three central terrestrial broadcasters and four comprehensive programming PPs from 2012 to 2019. For the analysis, Additive DEA model and Additive super-efficiency DEA model are used with the assumption of VRS condition since the broadcasting industry is characterized by economies of scale. As a result, we find out that the input excess of tangible assets is the most decisive cause of inefficiency that reduces the efficiency of central terrestrial broadcasters. On the other hand, for the comprehensive programming PPs, the input excess of tangible assets and the output shortfall of total sales are important factors of inefficiency.

Purpose: This study compared a 4-week corrective exercise program-adding active core stabilization to a shared postural-correction and diaphragmatic breathing component-with a stretching program using the same component, on craniovertebral angle (CVA) and pulmonary function in adults with forward head posture (FHP) and an inefficient breathing pattern. Maximal voluntary ventilation (MVV) was the primary outcome; CVA, Tiffeneau index, FVC, FEV1, MIP, and MEP were secondary outcomes. Methods: Thirty-six adults were randomized 1:1 to a corrective exercise or stretching group (n=18 each), performing 30-minute, homebased sessions three times weekly for four weeks after one in-person supervised session, with subsequent sessions guided by a standardized instructional video. CVA was measured by photogrammetry, and six pulmonary indices were assessed by digital spirometry pre- and post-intervention; Time×Group interactions were analyzed via mixed ANOVAs with Bonferroni correction. Results: CVA, FVC, FEV1, MIP, and MEP showed no significant Time×Group interaction (all p≥0.10); the four pulmonary indices improved over time in both groups (p<0.05), whereas CVA showed no significant change over time. The Tiffeneau index showed a nominally significant interaction (p=0.043) that did not survive correction, reflecting baseline differences. MVV, the primary outcome, showed a significant interaction (F=11.56, p=0.002) surviving correction, with a larger within-group improvement in the corrective exercise group (d=1.64) than the stretching group (d=0.50; between-group d=1.13). Change scores were not correlated among CVA, Tiffeneau index, and MVV. Conclusion: A short-term program adding core stabilization to shared postural-correction and diaphragmatic breathing produced a robust MVV improvement beyond stretching alone, without significant CVA change; general pulmonary function improved similarly in both groups. Functional respiratory gains may occur independently of postural realignment in adults with FHP.

The two-photon stereolithography (TPS) process is a promising technique for the fabrication of real three-dimensional (3D) nano/micro-structures via application of a femto-second laser, In TPS, when a near-infrared ultrashort-pulsed laser is closely focused onto a confined volume of photocurable resin, only the local area at the center of the focus is cured. Therefore, real 3D microstructures with resolution under the diffraction limit can be fabricated through a layer-by-layer accumulative technique, This process provides opportunities to develop neo-conceptive nano/micro devices in IT/BT industries, However, a number of issues, including development of effective fabrication methods, highly sensitive and functional materials, and neo-conceptive devices using TPS, must be addressed for the realization of industrial application of TPS. In this review article, we discuss our efforts related to TPS: effective fabrication methods, diverse two-photon curable materials for high functional devices, and applications.

Purpose: This study examined the potential moderating effects of insulin resistance and dietary inflammatory index (DII) on the relationship between body mass index (BMI) and peak postprandial glucose levels in patients with prediabetes and type 2 diabetes. Methods: A retrospective analysis was conducted, using integrated nutritional data from a diabetes management program for patients with prediabetes and type 2 diabetes who used continuous glucose monitoring (CGM). Data from 17 patients, including 408 meal records, were analyzed. The energy-adjusted DII (E-DII) was calculated, and peak postprandial glucose was matched for each meal. Statistical tests analyzed differences and relationships between variables. Hayes' SPSS PROCESS macro version 4.0 was used to identify the moderating effects. Results: Peak postprandial glucose levels varied significantly among E-DII subgroups (p < .026) and were positively correlated with insulin resistance (rho = .30, p = < .001) and E-DII (rho = .14, p = .004). Insulin resistance and E-DII had a multiple additive moderating effect on the relationship between BMI and peak postprandial glucose levels in glucose-controlled patients (F = 12.22, p < .001), explaining 21.6% of the variance. Conclusion: Higher E-DII scores, which indicated a more pro-inflammatory diet, were associated with increased glucose levels, especially for patients who were overweight and mildly obese. Patients with obesity who received insulin therapy had varied postprandial glucose levels depending on their insulin resistance status. These findings highlight the importance of tailored dietary interventions, inflammation management, and CGM to improve obesity-related glucose regulation.

Objective To investigate an additive effect of core muscle strengthening (CMS) and trunk neuromuscular electrical stimulation (tNEMS) on trunk balance in stroke patientsMethods Thirty patients with acute or subacute stroke who were unable to maintain static sitting balance for >5 minutes were enrolled and randomly assigned to 3 groups, i.e., patients in the CMS (n=10) group received additional CMS program; the tNMES group (n=10) received additional tNMES over the posterior back muscles; and the combination (CMS and tNMES) group (n=10) received both treatments. Each additional treatment was performed 3 times per week for 20 minutes per day over 3 weeks. Korean version of Berg Balance Scale (K-BBS), total score of postural assessment scale for stroke patients (PASS), Trunk Impairment Scale (TIS), and Korean version of Modified Barthel Index (K-MBI) were evaluated before and after 3 weeks of therapeutic intervention.Results All 3 groups showed improvements in K-BBS, PASS, TIS, and K-MBI after therapeutic interventions, with some differences. The combination group showed more improvements in K-BBS and the dynamic sitting balance of TIS, as compared to the CMS group; and more improvement in K-BBS, as compared to the tNMES group.Conclusion The results indicated an additive effect of CMS and tNMES on the recovery of trunk balance in patients with acute or subacute stroke who have poor sitting balance. Simultaneous application of CMS and tNMES should be considered when designing a rehabilitation program to improve trunk balance in stroke patients.

Detailed structures of the counterflow flames formed for different inlet fluid temperatures and different amount of additives are studied numerically. The detailed chemical reactions are modeled by using the CHEMKIN-II code. The discrete ordinates method and the narrow band based WSGGM with a gray gas regrouping technique (WSGGM-RG) are applied for modeling the radiative transfer through non-homogeneous and non-isothermal combustion gas mixtures generated by the counterflow flames. The results compared with those obtained by using the SNB model show that the WSGGM-RG is very successful in modeling the counterflow flames with non-gray gas mixture. The numerical results also show that the addition of $CO_2\;or\;H_2O$ to the oxidant lowers the peak temperature and the NO concentration in flame. But preheat of fuel or oxidant raises the flame temperature and the NO production rates. $O_2$ enrichment also causes to raise the temperature distribution and the NO production in flame. And it is found that the $O_2$ enrichment and the fuel preheat were the major parameters in affecting the flame width.

Objective To evaluate the additive eff ects of hyaluronidase combined with steroids in patients with peri-articular shoulder disorder. Method Thirty patients with peri-articular shoulder disorder were given subacromial bursa injections once a week for three consecutive weeks. Fifteen patients (Group A) underwent subacromial bursa injections with hyaluronidase 1,500 IU, triamcinolone 40 mg and 0.5% lidocaine (total 6 ml). Another fi fteen patients (Group B)underwent the same injections with triamcinolone 40 mg and 0.5% lidocaine (total 6 ml). We examined the active range of motion (AROM) in the shoulder, used a visual analogue scale (VAS) for measurement, and administered a shoulder disability questionnaire (SDQ) at the commencement of the study and then every week until one week after the third injection. Results There were no significant difference between group A and B before the injections took place (p>0.05). Statistically signifi cant improvement was seen in the VAS, SDQ, and AROM of fl exion, abduction, internal rotation at one week after the first and second injections compared with the parameters measured at previous visits in both groups (p<0.05), except the SDQ between one week after the fi rst and second injections in group B (p>0.05). Improvement in all parameters measured at one week after the third injection compared with the measurement values at one week after the second injection were not statistically signifi cant in both groups (p>0.05). However,group A (the hyaluronidase group) showed signifi cantly greater improvements than group B in terms of their SDQ and AROM of internal rotation scores one week after the three injections had taken place (p<0.05). Conclusion Peri-articular shoulder disorder patients who underwent subacromial bursa injections using hyaluronidase and steroids showed greater functional improvements than those who were given only steroid injections.

The experiment was conducted with 144 broiler chicks from day-old to 5 weeks of age to investigate the efficacy of a water additive in broiler production. The chicks were randomly distributed into four different treatments namely T1(control), T2(water additive as per recommendation level), T3(25% less than recommendation) and T4(25% more than recommendation). Body weight of control group was higher in 2nd week of age, but at the end of the experiment additive groups showed higher values compare to control(p<0.05). Body weight gain was increased and feed conversion ratio was improved in the additives groups during the finishing and total period, although feed intake was different among the additive groups(p<0.05). When the hematological parameters were evaluated, packed cell volume and total erythrocytes counts were increased in the additive group that received 25% more than recommendation, and hemoglobin in 25% less than recommendation group. Mean cell volume and mean cell hemoglobin of the additive groups showed lower(p<0.05) values compare to the control, but other parameters were not affected. Sales price and profit were significantly higher in the additive groups compare to the control, although total production cost was increased in the additive groups(p<0.05). All levels of water additive increased profit in comparison with the control but 25% less than recommendation level appeared to be most profitable and cost effective. It also suggests that any additive considered for poultry, must undergo trial for determining efficacy as well as its cost effectiveness for application.

Federated learning (FL) enables decentralized model training without sharing data, but most existing methods assume homogeneous model architectures across clients, limiting applicability in heterogeneous real-world environments. We propose FedUNet, a lightweight and architecture-agnostic FL framework that introduces an additive U-Net-inspired module attached to each client’s backbone. By sharing only the compact bottleneck of the U-Net, FedUNet enables efficient knowledge transfer without architectural alignment, shared data, or costly distillation. The encoder?decoder structure with skip connections integrates multi-scale features into a shared latent space, promoting client-invariant representation alignment across heterogeneous models. Experimental results on CIFAR-10 and CIFAR-100 with VGG and ResNet backbones show that FedUNet achieves high accuracy with significantly reduced communication and computational overhead. Notably, a full U-Net attains 93.92% accuracy while requiring only 0.89 MB of communication per round, highlighting its practicality for resource-constrained FL systems.

Selected feed additives (probiotics, prebiotics, synbiotics, postbiotics, phytogenics, feed enzymes, and organic acids) are reviewed for reported biological responses, and some recent developments when incorporated into laying hen diets. Several feed enzymes (phytase, carbohydrase, protease, and multi-enzymes) have been adopted to improve the nutritive quality of feedstuffs by mitigating inherent digestive function inefficiencies, complementing endogenous enzyme activity, and cleaving anti-nutritional factors abundant in vegetablebased poultry diets. Phytase use is targeted at hydrolyzing phytate to liberate phosphorus and possibly other encapsulated nutrients, with widely reported environmental and economic benefits. Proteases often improve the hydrolysis of amino acids and protein complexes to improve dietary protein digestibility and utilization, potentially restoring performance losses and maintaining the egg quality of hens fed low-protein diets whose CP level has been further reduced. The digestibility-enhancing effects of fiber-degrading carbohydrases are associated with the reduction of intestinal viscosity and improved energy utilization through depolymerization of soluble non-starch polysaccharides. Considering that nutrients exist in a complex matrix involving starch and non-starch polysaccharides, protein, lipids, minerals, and vitamins, laying hens could also benefit from potential additive and synergistic effects accrued from adopting defined feed enzyme combinations. The incorporation of gut-health-promoting feed additives (pre, pro, syn- and postbiotics, phytogenics, organic acids) optimizes feed nutrient utilization by inducing immuno-stimulatory, antimicrobial, and antioxidant activities, modulating gut immune function, and microbial balance and population. Hen responses to feed additives are context-dependent and highly variable due to various factors, including rearing system, age, breed, health status, environmental factors, feed composition and quality, and management. However, on balance, feed additive products with proven efficacy and financial value are recommended for inclusion in laying hen diets; and could potentiate optimized performance and egg quality, reduced feed costs, improved animal welfare and skeletal health, and reduced environmental stress due to nutrient excretion, thereby improving the economic and environmental sustainability of hen egg production. Strategic application of feed additive combinations could potentiate additive and synergistic responses.

Eggshell waste and Schisandra chinensis by-products are natural sources rich in beneficial nutrients and bioactive compounds. However, their combined effects with multi-probiotics on poultry productivity and health remain unexplored. This study assessed the immediate effects of a feed additive?eggshell waste (ES), Schisandra chinensis by-product (SC), and multiprobiotics (M)?administered for four weeks to aged laying hens before slaughter, evaluating the improvements of laying performance, egg quality, blood characteristics, visceral organs, tibia, and cecal microbiota. A total of 216 Hy-line Brown laying hens (70-week-old) were assigned to four dietary treatments consisting of 9 replicates of 6 birds in a completely randomized design. The combination of eggshell waste, Schisandra chinensis by-product, and multi-probiotics (ESM) of feed additive consisted of 40% eggshell, 5% SC, and 109?1011 CFU/g of multi-probiotic strains including Bacillus subtilis, Bacillus licheniformis, Saccharomyces cerevisiae, Lactobacillus plantarum, and supplemental nutrient premix. The treatment groups were as follows: corn? soybean meal-based basal diet (control); basal diet + 0.1% ESM; basal diet + 0.2% ESM, basal diet + 0.4% ESM. The total egg productivity rate during the experiment period tended to improve in ESM 0.2%, as compared with the control. The ESM 0.1% group increased egg weight (p < 0.05) while ESM 0.1% and ESM 0.2% tended to increase egg mass, compared to the control (p = 0.051). However, there was no significant difference in egg weight, feed intake ,feed conversion ratio, and egg quality among the treatments. Furthermore, blood characteristics did not differ between the treatments, except for the total cholesterol contents, which was higher in ESM 0.4% treatment than the control (p < 0.05). ESM 0.4% supplementation showed a tendency for higher calcium, compared to the control. ESM 0.4% supplementation showed higher bone mineral density (BMD) of the tibia neck than the control (p < 0.01). All three ESM groups demonstrated a significant decrease in the abundance of Bacteroidaceae (p < 0.05), and an increase in the abundance of Lactobaillaceae at the family level (p < 0.01). In conclusion, ESM fed hens showed beneficial effects on the egg weight, egg mass, BMD of tibia neck, and cecal microbiota in laying hens.

Achyranthes japonica extract (AJE) is derived from a medicinal plant Achyranthes japonica, known for its anti-inflammatory, antioxidant, and antimicrobial properties. AJE contains multiple bioactive compounds, including saponins, triterpenoids, phytoecdysteroids, 20-hydroxyecdysone, and inokosterone. The aim of this investigation was to examine the impact of AJE as a phytogenic feed additive on growth performance, nutrient digestibility, excreta microbial count, noxious gas emissions, breast meat quality in broilers. About three hundred and sixty, day-old broilers (Ross 308) were assigned into four treatments (five replication cages/treatment, and 18 birds/cage). Dietary treatments: CON, basal diet; 0.02% AJE, basal diet with 0.02%; 0.04% AJE, basal diet with 0.04% AJE, and 0.06% AJE, basal diet with 0.06% of AJE. Body weight gain increased linearly (p < 0.05) through the inclusion of AJE during days 7 to 21, 21 to 35, as well as the entire experimental period. Besides, feed intake increased (p < 0.05) linearly during days 21 to 35 and the entire experiment with the increased AJE doses in broiler diet. Dry matter digestibility was increased (p < 0.05) linearly along with increasing amounts of AJE. With increasing AJE supplementation, nitrogen and energy utilization tended to improve (p < 0.10). In summary, the addition of AJE in the corn-soybean meal diet led to higher body weight gain and increased feed intake as well as enhanced nutrient digestibility, among them the highest improvement was found in 0.06%-AJE indicating the acceptance of AJE as a phytogenic feed additive.

The influence of additive materials including saw dust and cow manure in the ripening of leather sludge for the efficient vermisabilization was studied. The ripening characteristics of the leather sludge, the growth of earthworms in the growth bed and the by-products like cast were observed according to the mixing ratio of additive materials. When the mixed leather sludge of which the additive materials contents were over 20% were ripened for 50 days, the values of ORP and alkalinity were changed to the favorable ranges for earthworms, the positive (+) and below 1,000 mg/l as $CaCO_3$, respectively. The velocity of ripening improving the characteristics of the leather sludge was faster in the sludge mixed with cow manure than saw dust. This results could also be verified from the monitoring of the states of earthworm growth using the survival rate, the increase rate of lifeweight and the hatching rate of earthworm cocoon in the their growth bed packed with the ripened sludge. The values of CEC in cast, the vermi-stabilized sludge, were increased with the mixing ratio of additive materials, but the content of heavy metals was drcreased by the dilution effect and accumulation in the earthworm body. Above results show that the leather sludge might be efficiently stabilized by earthworms through the ripening for 50 days using additive materials. Cow manure can be used as a good additive materials for leather sludge as much as saw dust, and the optimum content of additive materials in the well-ripened leather sludge was about 30%.

Thirty-six weaned piglets with an initial body weight (BW) of 8.43 ± 0.40 kg (28 days of age, ([Landrace × Yorkshire] × Duroc) were randomly assigned to 6 treatments for a 2-week feeding trial to determine the effects of different inorganic zinc (IZ), organic zinc (OZ) or combination of low crude protein diet (LP) and Mixed feed additive (MFA) on diarrhea score, nutrient digestibility, zinc utilization, blood profiles, organ weight, and fecal microflora in weaned piglet diet. The pigs were individually placed in 45 × 55 × 45 cm stainless steel metabolism cages in an environmentally controlled room (30 ± 1℃). The dietary treatments included a negative control (NC), positive control (PC; zinc oxide, 1,000 mg/kg), T1 (IZ : OZ, 850 : 150), T2 (IZ : OZ 700 : 300), T3 (IZ : OZ, 500 : 500), and T4 (LP + MFA [0.1% Essential oils + 0.08% Protease + 0.02% Xylanase]). The daily feed allowance was adjusted to 2.7 times the maintenance requirement for digestible energy (2.7 × 110 kcal of DE/kg BW0.75). This allowance was divided into two equal parts, and the piglets were fed at 08 : 30 and 17 : 30 each day. Water was provided ad libitum through a drinking nipple. The diarrhea score was significantly increased (p < 0.05) in NC treatment compared with other treatments. The apparent total tract digestibility (ATTD) of dry matter (DM), nitrogen (N), and gross energy (GE) was significantly increased (p < 0.05) in the T2 treatment compared with the PC and NC treatments in week 1. In week 2, the ATTD of DM, N, and GE was significantly decreased (p < 0.05) in the NC treatment compared with other treatments. The T3 treatment had significantly higher (p < 0.05) ATTD and apparent ileal digestibility of zinc than the PC and T1 treatments. The Escherichia coli count in feces was significantly decreased in the T4 treatment compared with the NC and T2 treatments. The Lactobacillus count in feces was significantly increased in the T4 and T1 treatment compared with the T2 and T3 treatments. In conclusion, IZ : OZ 500 : 500 levels could improve nutrient digestibility and zinc utilization in weaned piglets, Moreover, MFA in LP diets could be used as a zinc alternative.

The whole genome of Enterococcus faecium GB_C_05, a strain isolated from Sikhye, a traditional Korean rice beverage, was successfully sequenced and analyzed using Oxford Nanopore Technologies. The complete genome sequence of GB_C_05 contains a circular chromosome with a total length of 2,575,440 base pairs (bp) and a guanine + cytosine (GC) content of 38.2%, along with one circular plasmid, which has a length of 230,283 bp and a GC content of 35.2%. Annotation of the GB_C_05 genome revealed 2,756 proteincoding sequences (CDSs), 70 tRNAs, and 18 rRNAs on the chromosome. Notably, CDSs related to bacteriocin synthesis (Enterocin) and carbohydrate metabolism (α-galactosidase, β-glucosidase, and α-L-arabinofuranosidase), as well as genes potentially involved in probiotic-associated functions such as adhesion and colonization, were identified. This comprehensive study presents the complete genome sequence of E. faecium GB_C_05, providing insight into the diverse additives utilized in animal farming to enhance nutritional quality and livestock productivity.

This study was conducted to compare the mechanical properties of NAB (Ni-Al-Bronze) material manufactured using WAAM (wire arc additive manufacturing) technology and cast NAB that has been used. Two types of mechanical property test pieces were collected from the deposited bulk NAB material according to the direction of deposition, and compared with each other. As a result of mechanical property evaluation, the deposited NAB exhibited anisotropy according to the direction of deposition, and showed high tensile strength, hardness, and shock absorption in the longitudinal direction of the welding line.