본 연구는 교회학교 교사의 인성리더십 생활화를 근거이론 접근을 통해 살펴 봄으로써 경험에 근거한 실체이론을 개발하는데 연구의 목적이 있다. 본 연구는 인성리더십의 이론적, 실천적 모델인 황금원 모델(Golden Circle Model)에 주목 하였으며, 교회학교 교사의 황금원 모델 적용을 위한 성경적 기반을 제시하였 다. 이를 바탕으로 본 연구는 질적 연구방법인 근거이론을 채택하여 황금원 모 델에 기반한 인성리더십 프로그램인 ‘매일멋진사람들’을 이수한 4명의 연구 참 여자를 대상으로 총 16회 이상의 개별 심층면담을 수행하였으며, Strauss와 Corbin(1998)이 제시한 분석절차에 따라 자료를 분석하였다. 첫째, 교회학교 교사의 순종리더십 생활화 과정은 총 14가지의 범주로 나타났 으며 낮아짐￫신뢰￫훈련의 단계로 분석되었다. 둘째, 자기리더십 생활화 과정은 총 14가지의 범주로 나타났으며 꿈꾸는￫소진￫세움의 단계로 분석되었다. 셋째, 섬김리더십 생활화 과정은 총 13가지의 범주로 나타났으며 미러링￫눈높이￫헤아 림 단계로 분석되었다. 넷째, 변환리더십 생활화 과정은 총 12가지의 범주로 나 타났으며 공동사명￫공동협력￫공동감사 단계로 분석되었다. 이는 향후 크리스천 인성리더십에 관한 이론적, 방법적, 실천적 기틀을 마련하고, 크리스천 인성리더 십에 관한 연구와 교육에 효과적인 기초 자료로 활용될 것을 기대한다.

Daehan Hospital was constructed over approximately three years, beginning with site formation works in 1906 and continuing through 1909 with the completion of the medical school and other facilities. Because land acquisition and construction progressed simultaneously, the project initially began with plans limited to the main building and wards, and it was not possible to establish a comprehensive master plan for the medical school, official residences, dormitories, and other auxiliary facilities. Instead, additional land was gradually acquired and developed, and further construction was carried out in phases. As initially integrated functions were differentiated, the complex expanded by functional zones. The clinical and educational functions housed in the main building were separated through the construction of the medical school, and the dormitory area within the medical school zone was later subdivided and expanded as an educational district during the period of the Joseon Government-General Hospital. While the overall site developed through zoned expansion, the original arrangement of the main building and wards followed a typical pavilion plan. This planning concept, which became a standard model of hospital layout in Europe and the United States in the late nineteenth century, was introduced to Daehan Hospital via Japan, reflecting contemporary Japanese hospital planning principles implemented through the architectural organization of the Ministry of Finance.

Racing boats operate under high-speed conditions and repetitive rapid maneuvers, where the performance of the propulsion system plays a critical role in race outcomes. The propeller is a key component that converts engine rotational power into thrust and must maintain structural stability under high rotational speeds and hydrodynamic loading. In this study, a racing boat propeller based on a carbon fiber reinforced plastic(CFRP) laminate structure was designed and a manufacturing process was established. The proposed propeller consists of a two-blade configuration in which the hub and blades are integrated into a single structure to minimize structural discontinuity under high rotational conditions. The composite propeller was fabricated using a prepreg lay-up process followed by vacuum-assisted thermal curing. In addition, flat laminate panels with the same carbon fiber lay-up configuration as the propeller were simultaneously manufactured to prepare bending test specimens for process verification. Flexural tests were conducted to evaluate the mechanical characteristics of the CFRP laminate structure. The results of this study provide fundamental data for the design and manufacturing of lightweight CFRP-based racing boat propellers.

본 연구는 장기요양 현장에서 근무하는 요양보호사의 정서조절 경험 과 스트레스 인식 형성 과정을 탐색하는 데 목적이 있다. 이를 위해 S 시 장기요양 현장에서 근무 경험이 있는 요양보호사 35명을 대상으로 2025년 10월 10일부터 2025년 12월 10일까지 반구조화된 심층면담 을 실시하였다. 면담은 참여자 1인당 30분에서 40분 동안 진행되었으 며, 수집된 자료는 지속적 비교 분석 방법에 따라 분석하였다. 연구결과, 요양보호사는 돌봄 상황에서 분노, 무력감, 체념과 같은 복합적인 정서를 경험하였다. 참여자들은 감정 억제, 인지적 재해석, 거리두기 등 다양한 정서조절 전략을 활용하였으며, 이러한 방식은 스트레 스 인식의 형성과 강도에 영향을 미쳤다. 특히 인지적 재해석과 관계적 소통은 스트레스 인식을 완충하는 경향을 보였고, 감정 억제 중심의 전 략은 이를 강화하는 방향으로 작용하였다. 또한, 스트레스 인식은 외부 사건 자체보다 개인의 인지적 평가와 관계적 맥락 속에서 형성되는 과 정으로 확인되었다. 본 연구는 장기요양 현장에서의 스트레스가 정서조 절 경험과 관계적 상호작용 속에서 구성되는 동적인 과정임을 제시한다 는 점에서 의의를 가진다.

This study re-evaluates the breeding history and agronomic stability traits of the garlic cultivar ‘Mansan’, emphasizing its suitability for consistent production in rapidly changing climatic conditions. ‘Mansan’ was developed from an open-pollinated seed of the genetic resource ‘14-2w’, collected in 2000. Line selection occurred from 2002 to 2010, followed by regional adaptability tests conducted in Suwon, Danyang, and Namhae from 2012 to 2014, leading to the final selection of this cultivar. ‘Mansan’ features an open plant type with milky white bulb skin, closely resembling the local cultivar ‘Danyang’. In regional trials, ‘Mansan’ achieved an average yield of 1,092 kg per 10a over three years, which is 5% higher than the control cultivar ‘Danyang’ (1,038 kg per 10a). Additionally, evaluations for resistance to major diseases, insect pests, and physiological disorders revealed that the control exhibited rates of 1.5% for secondary growth and 2.1% for leafy and non-bulbing issues, while no such disorders were noted in ‘Mansan’. This suggests that ‘Mansan’ demonstrates superior physiological stability under variable environmental conditions. In conclusion, ‘Mansan’ is a high-yielding and physiologically stable cultivar with excellent cultivation reliability. It is anticipated to replace existing northern-type garlic cultivars and contribute to increased farm income.

Odorous compounds from the operation of wastewater treatment plants (WWTPs) have increasingly become public health concerns and civil complaints. This study identifies priority management stages in WWTPs by quantitatively analyzing the distribution of complex odor and designated odor substances across key processes using a dimensionless tool (the Odor Activity Value, OAV), while providing a statistical basis and operational strategies for efficient odor mitigation in public facilities. Although there was a very poor correlation between designated odorous concentrations and complex odor level (dilution ratio), the application of the OAV yielded much more accurate results with a strong correlation (R2 = 0.7) specifically at high-temperature condition. Odor potential in the wastewater treatment processes fluctuates substantially depending on the specific unit. Statistical analysis using Kruskal–Wallis tests demonstrated that influent and sludge treatment process (return flow and centrate) produce much higher odor intensities compared to the biological reactor and secondary clarifier. Based on PERMANOVA analysis, differences in the profiles of complex odor and the OAVs of designated odorants across 6 treatment stages explained 64.1% of the total variance. Principal Coordinates Analysis (PCoA) showed that sludge treatment processes form a distinct, unique cluster, whereas sewage treatment streams present a more gradual transition of odor profiles. Statistical assessment using the Mann-Whitney U test demonstrated that mean odorants levels did not have considerable shift under high-temperature and low-temperature conditions. However, the sensory perception in higher temperatures enhanced relative to the OAVs. In conclusion, the OAV is an effective dimensionless tool, as it establishes priorities in odor management and control, offering a practical supplementary indicator for addressing civil complaints. These findings provide a robust foundation for optimizing deodorization systems designs and operational efficiency of odor mitigation systems within WWTPs.

대구읍성은 삼국시대 신라 달성에서 출발하여 고려시대를 거쳐 조선시대 평지 읍성으로 전환되는 장기적 공간 재편의 흐름 속에서 형성된 역사적 공간이다. 본 연구는 대구읍성의 형성과정과 시기별 축성법의 특징을 통시적으로 검토함으로써, 대구읍성이 단순한 방어시 설을 넘어 지방 통치 전략의 변화, 행정 중심지의 재구성, 교통·물류 거점 기능의 확장과 긴 밀히 연관된 복합적 역사 공간이었음을 규명하고자 한다. 달성은 삼국시대부터 조선 초기까지 대구 지역의 치소성으로 기능하였으며, 고려 공양왕 2년(1390)에 석성으로 개축되었다. 세종대에 관아가 평지로 이전되면서 달성은 읍성으로서 의 기능을 상실하였고, 이후 약 150년간 무읍성 시기가 지속되었다. 이후 선조 24년(1591), 임진왜란 직전에 평지 읍성이 초축되었다. 선조 34년(1601) 경상감영이 대구에 상설 설치되 면서 대구는 영남 지역의 행정·군사·물류 중심지로 확고히 자리매김하였다. 축성법 측면에서 초축 성벽을 토성으로 보는 기존 견해는 재검토가 필요하다. 동시기에 축조 된 청도·성주·삼가·영천·경산·안동·상주 읍성이 모두 석성으로 조성된 점을 고려할 때, 행정 위계가 높은 대구읍성만 토성으로 축조되었다고 보기에는 설득력이 낮다. 오히려 임진왜란 과정에서 석성 외벽이 파괴·붕괴된 이후 토성처럼 인식되었을 가능성이 크다. 북벽 구간 발 굴조사에서 확인된 기저부 축성법의 차이 역시 이러한 해석을 뒷받침한다. 영조 12년(1736)의 수축은 여장의 정형화, 총안 배치의 체계화, 성돌 규격화 등 구조적 기술 혁신을 수반한 축성사적 사건이었다. 이는 『기효신서』 수용 이후 조선 후기 축성기술이 성숙 단계에 도달했음을 실증적으로 보여준다. 고종 7년(1870)의 재수축에서는 회삼물을 활용한 여장의 전면 신축과 돈대·포루·표루의 입체적 배치를 통해 방어 기능이 한층 강화되었으며, 임노동 기반 고용체제로의 전환이라는 조선 후기 사회 변화도 반영되었다. 대구읍성은 산성 중심의 군현 방어체계에서 평지 읍성 체제로의 전환을 상징하는 유산이자, 조선 후기 축성기술의 발전 단계가 집약된 대표적 평지 읍성으로 평가된다. 또한 「영영축성 비」와 「수성비」라는 두 금석문이 현존하는 유일한 사례로서, 조선 후기 지방 행정력과 사회 조직, 노동 체계를 보여주는 탁월한 1차 사료적 가치를 지닌다.

Betulin, a pentacyclic triterpenoid, abundantly accumulated in Inonotus obliquus (chaga mushroom), exhibits strong anti-inflammatory, antioxidant, anticancer, and wound-healing properties. However, its extraction remains challenging due to its poor solubility and thermal sensitivity. In this study, we optimized ultrasound-assisted extraction (UAE) using response surface methodology (RSM) to maximize simultaneous betulin and antioxidant compound recovery from I. obliquus. We evaluated three extraction variables (i.e., time, temperature, and ethanol concentration) using a three-factor, five-level design. All quadratic models were significant (p < 0.05), with R² values ranging from 0.83 to 0.93 and prediction errors remaining below 5 %, thereby confirming strong model reliability. Multi-response optimization using a superimposed response plot identified 92.08 % ethanol, 42.56 min, and 62.19 °C as a narrow optimal region, in which all responses simultaneously met the desired criteria. Under these conditions, extraction was predicted to yield high phenolic content (2.58 mg GAE/g DM), increased flavonoid levels (0.57 mg QE/ g DM), strong DPPH radical-scavenging activity (87.49 % DSA), and a betulin content of 2.00 mg/g DM. In contrast, low ethanol concentrations, excessive heating, or prolonged extraction times resulted in reduced yields due to the oxidative or thermal degradation of the bioactive constituents. Overall, the optimized extraction conditions emphasize the importance of controlling solvent polarity and balancing the temperature and time parameters to prevent thermolabile compound decomposition. These results provide a reproducible and eco-efficient framework for large-scale antioxidant constituent extraction from I. obliquus.

This study conducts a precise analysis of the formation process of the Eonmun Spelling System (1930) by examining its primary source materials: the Eonmun Spelling System (Internal Draft) (1928) and the Eonmun Spelling System (Base Text of the Revision) (1929). The 1930 orthography served as a significant turning point in the history of Korean writing systems by establishing the foundation for morphophonemic spelling through the expansion of the final consonant system and refinement of syllabic separation rules. Notably, this research uncovers and compares the Japanese version of the Base Text of the Revision, which had previously been studied only through Korean translations in newspapers such as Dong-a Ilbo. The findings reveal that these translations were not mere renditions, but intentional revisions reflecting the Deliberation Committee’s discussions and the translators’ normative orientations. Furthermore, by analyzing handwritten notes in the mimeographed original of the Base Text, this paper reconstructs debates on core issues, such as morphological representation, initial sound rules, fortis, and the epenthetic sound notation. Ultimately, this study illuminates the dynamic process through which the 1930 orthography emerged from negotiations between the government-general’s policy demands and the academic aspirations of Korean linguists.

External steel frame retrofitting effectively enhances the lateral resistance performance of existing reinforced concrete school buildings. However, when column shear failure occurs, ductility capacity is reduced, posing a risk of sudden collapse in high-seismic hazard areas. The purpose of this study is to propose a linear-elastic analysis-based retrofit process to reduce the likelihood of column shear failure and maximize retrofit effectiveness when applying external steel frame retrofitting. To achieve these objectives, a multiple-step process was presented and a case application was performed using quasi-static cyclic loading test results of a school building specimen retrofitted with an external steel frame system. Experimental results showed that strength, stiffness, and energy dissipation were improved by the retrofit system. However, the damage mechanism shifted from beam-column joints to column bases, resulting in reduced ductility capacity due to column shear failure. By applying the proposed process, the lateral stiffness ratio of the external steel frame columns was increased from 0.23 to 0.74, eliminating shear failure in existing reinforced concrete columns and confirming that it can contribute to improving ductility capacity.

This study examines whether a 3D virtual fitting system can function as an efficient digital pattern-making method for women’s jeans to complement or replace conventional 2D measurement-based design. It further explores the potential application of virtual fitting-based pattern design processes in digital fashion education and the apparel industry. To develop 3D virtual fitting-based pants, a close-fitting 3D pants pattern was generated by flattening an avatar’s lower-body surface. Initial evaluations necessitated adjustments in dart volume and placement for both the front and back panels. Stress analysis further revealed high concentrations near the crotch, requiring modifications to the crotch extension. The pattern was iteratively refined using real-time feedback from appearance changes, stress distribution, and fitting errors during virtual fitting. Post-modification evaluation results showed significant improvements across all appearance evaluation categories. Notable enhancements were found in key fit factors, including dart position and length, crotch appearance, and hip fit. Subsequently, a digital jeans pattern was designed based on the refined close-fitting 3D pants pattern. Stepwise modifications informed by virtual fitting data led to improvements in both appearance and silhouette completeness. Comparative evaluation of jeans produced using the proposed 3D-derived pattern and a conventional 2D pattern showed no significant differences across most assessment items. However, the 3D-derived pattern scored significantly higher in critical areas such as thigh appearance and knee-line positioning. This indicates that 3D-based pattern design is particularly effective in areas requiring accurate reflection of 3D body curvature and movement characteristics.

In laser powder bed fusion (L-PBF), a metal powder–based additive manufacturing process, pure titanium powders rely on expensive gas-atomized spherical powders, which poses a significant limitation of material cost. In contrast, non-spherical titanium powders are more cost-effective but their application in L-PBF is restricted their use due to poor flow property and high oxygen content. In this study, a powder mixing strategy with spherical titanium and hydrophobic SiO2 nanoparticle is proposed to improve the flowability and process stability of non-spherical Ti powders. After evaluating flow properties at various mixing ratios, a spherical-to-non-spherical Ti ratio of 4:6 was selected, with SiO2 nanoparticles added during mixing. The uniform distribution of oxide nanoparticles on the powder surfaces was confirmed by SEM and EDS. A maximum relative density of 99.7% was shown by specimens made with L-PBF under various processing parameters. The specimens obtained a tensile strength of 762.6 ± 3.8 MPa and an elongation of 22.1 ± 0.7% at a volumetric energy density of 71.4 J/mm³. This study demonstrates the application of low-cost non-spherical Ti powders in L-PBF is feasible and presents an effective way to simultaneously increase process stability and economic efficiency in titanium additive manufacturing.

Ti.Grade12 is widely used in chemical processing, power generation, and nuclear industries because of its excellent corrosion resistance and mechanical strength, enhanced by alloying elements such as Ni and Mo. Ceramic reinforcements such as TiN have been reported to significantly improve the surface hardness and wear resistance of titanium-based materials. Furthermore, nano-sized WC particles can suppress excessive intermetallic compound formation and stabilize the Ti matrix through grain boundary pinning and microstructural control mechanisms. However, strong interfacial bonding between Ti and ceramic reinforcements generally requires high temperatures and prolonged sintering times, which may induce undesirable secondary phase formation. Therefore, optimizing the mixing ratio of Ti, TiN, and WC is essential to achieve a homogeneous interface and a stable composite structure. In this study, a composite layered structure was fabricated on a Ti.Grade12 substrate using mixed Ti, TiN, and nano-sized WC powders via Spark Plasma Sintering. A composition of 60 wt% Ti, 35 wt% TiN, and 5 wt% WC formed a stable coating layer without secondary phases and achieved a micro vickers hardness of approximately 2400 Hv.

This study aimed to enhance the safety of autonomous bus services by systematically identifying safety-related factors and establishing priorities based on real-world operating environments. An expert survey was conducted using a autonomous bus currently operating in Pangyo Zero City as a case study. Building on the concept of the Operational Design Domain, a two-layer safety framework was developed consisting of four primary categories (Layer 1): physical infrastructure, operating conditions, communication environment, and weather conditions, and their corresponding detailed elements (Layer 2). A fuzzy Analytic Hierarchy Process(AHP) analysis revealed that physical infrastructure had the highest relative importance, with key safety-critical factors identified as intersection type, construction work zone, lane markings, and adverse weather. Subsequently, a strength, weakness, opportunity and threat (SWOT) analysis was employed to propose short-, mid-, and long-term strategic actions, including the enhancement of object recognition functions based on advanced camera sensor fusion, reinforcement of safety driver and onboard safety personnel systems, and establishment of infrastructure pre-notification systems for construction and maintenance activities. This study provides a quantitative prioritization of safety factors for autonomous bus services and links these findings to a practical technology and policy roadmap, contributing to the enhancement of safety and development of commercialization strategies for future autonomous public transportation services.

본 연구는 글로벌 해운물류에서 디지털 전환과 지속가능성 요구가 급격히 높아지는 시대적 흐름 속에서, 스마트항만의 효과적 인 도입과 평가체계 확립의 필요성에 대응하고자 수행되었다. 계층분석법(AHP)을 활용하여 스마트기술, 인프라, 운영, 환경·에너지, 거버 넌스 영역에 걸친 핵심 평가요인을 체계적으로 도출하고 우선순위를 산정하였다. 연구 결과, 사물인터넷(IoT) 및 센서 기반 기술이 가장 중요한 요인으로 나타났으며, 그 뒤를 5G 통신기술, 데이터 인프라, 자율형 항만설비가 이었다. 또한, 운영 자동화와 기관 간 협력 역시 항만 효율성과 회복 탄력성을 높이는 데 핵심적인 요소로 확인되었다. 이러한 결과는 스마트항만 평가를 위한 포괄적이고 계층적인 분석 프레임워크를 제시함으로써 이 분야의 이론적 기반을 강화한다는 점에서 의의가 있으며, 실무적으로는 안전한 스마트항만 개발에 당국이 자원 배분을 최적화하고 단계적 발전 전략을 수립하는 데 실질적 시사점을 제공한다. 향후 연구에서는 다양한 항만을 대상으로 실증 분 석을 확대하고, 신기술을 통합한 의사결정 모델 고도화를 통해 지속 가능하고 경쟁력 있는 스마트항만 생태계 구축을 더욱 촉진할 필요 가 있다.

In this study, a particle shape control process was developed to fabricate flake-like SUS316L powders about 20 μm for application in semiconductor gas filters. The Flake powder was produced through a wet milling process using a Planetary Mill by varying the rotation speed, milling time, solvent, and polyvinylpyrrolidone (PVP) dispersant conditions. The fabricated powders were then characterized to evaluate their morphological and phase transformation behaviors. In the ethanol-based Planetary Milling process, as the rotation speed increased from 300, 400, 500 rpm, the powder morphology was observed to gradually change from spherical to flake-like due to the increase in milling energy. According to the XRD, as the rotation speed increased, a phase transformation from austenite to martensite occurred due to the increase in heat generation and collisions between the powder and balls. In addition, an increase in Full Width at Half Maximum (FWHM) was observed, indicating a decrease in crystallinity. Under different solvent and dispersant conditions, the addition of 5 wt% PVP to the deionized water (DI Water) solvent suppressed particle fracture and produced more uniform flake-like particles compared with the DI Water process without PVP. In addition, a smaller FWHM and reduced oxygen content were observed.

본 연구는 한국에 체류하는 외국인 유학생의 문화적응 경험을 심층 탐 색하고, 이를 학습 경험 관점에서 동적·과정적 모형으로 제시하는 데 목 적이 있다. 중국, 베트남, 미얀마 출신 유학생 10명을 대상으로 심층면담 을 실시하고, 근거이론 방법으로 개방형·축·선택 코딩을 통해 분석하였 다. 분석 결과, 자기주도적 학습을 통한 초기 적응 시도, 언어교환 및 동 아리 활동등을 통한 협력적 상호 지지, 학업과 생활 경험을 연계한 실천 적 학습을 통한 정체성 형성이 반복적·누적적으로 나타났다. 문화적응은 고정된 결과가 아니라 경험의 의미화와 조정이 지속되는 동적 과정이며, 개인 노력과 사회적 지지, 제도적 환경이 상호작용하며 적응 경험을 형 성함을 확인하였다. 본 연구는 유학생 지원 정책과 교육 프로그램 설계 시 학습 경험과 더불어 사회적·제도적 요인의 중요성을 강조하는 실천적 시사점을 제공한다.

본 연구는 조직 내 중간관리자가 경험하는 울분의 심리적 과정을 근거이론으 로 탐색하고, 그 구조적·정서적 특성을 규명하고자 하였다. 다양한 산업군의 중 간관리자 10명을 대상으로 심층면접을 실시한 결과, 울분의 인과적 조건은 세대 및 위계 갈등, 정체감 인식이었으며, 맥락적 조건은 구조적 조직환경변화, MZ세 대에 허용적 문화 및 개인적 조직경험 변화로 나타났다. 중심현상은 구조적·심 리적 임파워먼트 결여로, 중재적 조건으로는 직업적 변화, 관계적 지지, 자아성 찰이 작용하였고, 상호작용전략은 관계적 거리두기, 심리적 불균형 회복 노력이 도출되었다. 결과는 자기돌봄·만족추구, 심리적 거리두기, 양가적 감정의 지속 으로 나타났다. 과정분석 결과, 울분경험은 촉발, 고착화, 조절시도 및 귀결의 네 단계로 전개되었으며, 다섯 가지 대처유형이 구분되었다. 이러한 결과는 중간관 리자의 울분이 조직구조와 정체성 간 긴장 속에서 형성되는 심리사회적 적응과 정임을 보여주며, 이를 위한 정서관리 지원체계 및 코칭 개입을 위한 시사점을 제공한다.

본 연구는 근거이론을 활용하여 노인학습자의 디지털 문해교육 학습경험이 어떻게 전개 되어 학습이 지속되는지를 탐색하였다. 이를 위해 평생교육기관의 디지털 문해교육에 참여 한 65~75세 노인학습자 10명을 대상으로 심층 면담을 실시하였다. 분석 결과, 노인학습자 의 학습경험은 위축–대면–조정–전이의 단계로 전개되는 과정적 구조를 보였으며, 이를 CARE 모델로 이론화하였다. 이 과정에서 코칭 기반 상호작용은 학습자의 정서와 학습 방식 을 조정하는 핵심 매개로 작용하였고, 반복 연습과 개인화된 학습 전략, 동료 상호작용은 학습의 지속과 일상 전이를 가능하게 하는 조건으로 나타났다. 본 연구는 노인학습자의 디지털 문해교육을 단순한 기술 습득이 아닌, 코칭의 중재로 학습경험이 조정되고 일상과 삶의 맥락으로 확장되는 과정적 학습으로 재개념화하였다는 점에서 의의를 지닌다.

The loss of soil available nutrients may affect soil quality and crop growth. Biochar can form a multi-level fixed network because of its rich pore structure and surface functional groups, which can effectively fix available nutrients in soil and maintain nutrient utilization rate. Because it is difficult to directly prepare biochar materials with good adsorption characteristics through experimental results. This study employed an XGBoost machine learning prediction model to determine the optimal nutrient-rich biochar preparation conditions. The R2 value ranged from 0.97 to 0.99. The results indicated that specific surface area was the primary factor influencing ammonium nitrogen adsorption, with a feature importance of 56.13%. Production conditions (hydrothermal temperature and time) significantly affected the adsorption of nitrate nitrogen and available phosphorus, with feature importances of 75.91% and 81.54%, respectively. Mean pore diameter was negatively correlated with potassium ion adsorption characteristics. Biochar prepared under hydrothermal conditions at 202.50–251.25 °C for 3 h exhibited favorable adsorption characteristics for multiple soil available nutrients. This study provides new insights into biochar’s application in the field of soil nutrient adsorption through data analysis. It is helpful to avoid the waste in the process of energy utilization from biomass to biochar.