bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of biochar composition and paclobutrazol concentration on growth and yield of G1 Medians cultivar potato seeds in Jatinangor medium plain
Authors: Hamdani Jajang Sauman , Putri Zahira Salsabilla Idris , Sutari Wawan
Published: August 2024

Potato seed production in the medium plain is necessary to avoid environmental damage and the limited area of potato seed production in the high plain. The effort to increase the production of G1 potato seeds on the medium plain is the evaluation of the biochar composition and concentration of paclobutrazol that can increase the production G1 potato seeds cv Medians in the medium plain of Jatinangor. The research was conducted from August to December 2022 at the Ciparanje Experimental Field. Jatinangor. Faculty of Agriculture. Universitas Padjadjaran. The experiment used a Factorial Randomized Block Design (RBD). The first factor was the biochar composition: m1 (100% compost), m2 (80% compost + 20% rice husk biochar), m3 (80% compost + 20% coconut shell biochar), and m4 (80% compost + 10% biochar husk rice + 10% coconut shell biochar). The second factor was the paclobutrazol concentration: p1 (without paclobutrazol), p2 (100 ppm paclobutrazol), and p3 (150 ppm paclobutrazol). The experimental results showed that there was no reaction effect of biochar compositions and paclobutrazol concentrations on the growth and yield of G1 potato seeds. The application of 80% compost + 20 % rice husk biochar gave significantly higher yields than treatment without biochar. The number of tubers was 6.29 knol per plant and the tuber weight was 66.80 g per plant. Application of 100 ppm paclobutrazol resulted in lower plant height, gave the number of tubers was 6.39 knol per plant, tuber weight per plant was 63.34 g higher than without paclobutrazol and produced more seed tubers with S class.
Quality and resistance optimization of banana (Musa acuminata L.) vegetative seeds through the addition of indole butyric acid with biological agents induction against fusarium wilt disease intensity
Authors: Septia Erfan Dani , Zakia Aulia , Zainudinn Agus , Maftuchah Maftuchah , Gofur Abdul , Abbabiel Yudantara Ekanaradhipa
Published: August 2024

Banana plants are a vital agricultural commodity in Indonesia, but Fusarium wilt disease (Fusarium oxysporum) significantly hampers production. This research aims to improve the quality and resilience of vegetative banana seedlings by selecting superior seedlings and vegetative propagation techniques such as budding, shoot cutting, and tissue culture management. The research used a randomized complete block design (RCBD) factorial with a combination of two factors, namely the addition of IBA and biological agents, with nine treatment combinations and three replications. IBA treatment significantly affected the initial emergence of shoots and leaf area, with the best result from treatment Z2 (IBA concentration of 1.5 g/l). The biological agent factor treatment significantly affected plant height, lower stem diameter, number of leaves, and hypothetical vigor index, with the best value shown by treatment B1. The use of IBA and biological agents can optimize the quality and resilience of vegetative banana seedlings, aiding farmers in enhancing the productivity and quality of agricultural products sustainably.
Microbial phosphate solubilization mechanisms in P solubilizing in andisol
Authors: Marpaung Agustina E , Sabrina T , Rauf A , Susilowati D N
Published: August 2024

Phosphate (P) nutrient plays a significant role in plant growth and yield. P is an essential element that plays an important role in photosynthesis and root development. Phosphate nutrient availability is deficient in some soil types due to retention, such as in Andisol soil types. High phosphate retention in Andisol soil types causes P nutrients to be unavailable to plants and can reduce crop yields. The availability of P in Andisol soils can be done, among others, by applying phosphate solubilizing microbes. Phosphate solubilizing microorganisms are soil microorganisms consisting of bacteria and fungi that can mineralize organic P, dissolve inorganic P minerals, and store large amounts of P to make it available to plants. This literature review aims to determine the mechanism of phosphate-solubilizing microbes in P dissolution in Andisol soil. The methods used in this systematic review are collecting data through the internet and utilizing recognized sources such as Science Direct, Research Gate, Google Scholar, and Web of Science. Content analysis was performed on the collected data, and the results were organized into thematic categories. Furthermore, the findings are presented descriptively with the help of tables to facilitate understanding. Since phosphate-solubilizing microorganisms can dissolve P in the soil through chemical and biological mechanisms, it can be concluded that phosphate-solubilizing microorganisms also have an important role in the soil P cycle. The implications of this literature review are to understand the retention of P nutrients in Andisols and how the dissolution mechanism works, as well as the use of microbes as a solution to increase phosphate dissolution so that it is available to plants.
Influence of phosphate and boron addition to mixed liquid fertilizer on the growth and yield of red chili cultivated in the subsoil layer
Authors: Sari Stefina Liana , Sofyan Emma Trinurani , Yuniarti Anni
Published: August 2024

This study assesses the impact of adding phosphate and boron in a mixed liquid fertilizer (MLF)  on the growth and yield of red chili plants cultivated in a subsoil environment. The experiment was conducted to comprehend how these nutrients affect the performance of red chili plants, particularly when cultivated in less ideal conditions such as subsoil, a remnant of excavation for brick production. The research was carried out at the Ciparanje Garden of the Faculty of Agriculture, Universitas Padjadjaran. The research design employed a Randomized Completely Block Design with the following treatments: A = Control (degraded soil without fertilizer), B = 0% MLF + 1 NPK, C = 0.25% MLF + 1 NPK, D = 0.50% MLF + 1 NPK, E = 0.75% MLF + 1 NPK, F = 1.00% MLF + 1 NPK, G = 0.5% MLF + 3/4 NPK, H = 0.5% MLF + 1/2 NPK, I = 0.5% MLF + 1/4 NPK, J = 0.5% MLF + 0 NPK, and K = 1 NPK in normal soil. The results revealed that the addition of phosphate and boron in MLF significantly influenced the growth and yield of red chili in subsoil conditions. The recommended MLF concentration was 0.75%, alongside the standard NPK dose. These findings provide crucial insights for the development of more efficient and sustainable agricultural practices, especially in challenging soil conditions like subsoil, where nutrient availability can be a determining factor for agricultural success.
Morphological characterization, seed production, and oil content of several lemongrass (Cymbopogon citratus (D.C.) Stapf.) Line
Authors: Setiadi Adi , Syukur Cheppy , Holid Idam , Lindiana Lindiana
Published: August 2024

Cymbopogon citratus, commonly known as lemongrass, is a perennial herb widely cultivated for its culinary, medicinal, and aromatic industries. This research investigates the morphological characterization and potential yield of different lemongrass lines. The study involved the collection of diverse lemongrass genotypes from various geographic regions in Indonesia. The research was conducted using a randomized block design with three replications. Morphological character observations encompass both quantitative and qualitative characters of plants. Morphological characteristics such as plant height, leaf length and width, stem diameter, and number of tillers were measured to assess the variations among the genotypes. The results revealed considerable variability in the morphological traits among the lemongrass. Plant height ranged from 102.28 to 158.96 cm, while stem length and diameter varied between 26.11 to 42.61 cm and 8.99 to 19.68 cm, respectively. The number of tillers per plant ranged from 7.59 to 49.41. Moreover, the essential oil content varied from 0.07% to 0.26% (v/w). According to correlation analysis, the stem's diameter and the leaf's width positively correlate with the essential oil content. As a result, we can continue to develop the Sukabumi local line to maximize biomass and essential oil yields.
Effect of chemical and mechanical weed control on weed seed banks in rice field
Authors: Umiyati Uum , Widayat Dedi , Maharani Yani
Published: August 2024

Weed control is essential for ensuring the diversity of weeds on agricultural land. A study was conducted in rice fields in Subang and Cianjur districts, where 24 fields were observed to have varying weed management approaches. The research employed descriptive methods, including surveys to identify weed types and destructive methods to analyze weed seed banks at different depths. The descriptive methods included surveys to identify weed types and destructive methods to analyze weed seed banks at different depths. Each district contained twelve rice fields that reflected diverse environmental conditions and weed control techniques, yet shared a similar age range of 1-5 weeks. The study examined the weed vegetation, community coefficients, weed diversity, weed dominance, and variations in seed banks at various depths. The results indicated that fields without herbicide-based weed control had a higher number of weed species than those using herbicides. Herbicide use effectively decreased weed populations, subsequently altering the seed bank composition. The dominant weeds in herbicide-treated fields were Cynodon dactylon, Pistia stratiotes, and Ludwigia adscendens, whereas Ludwigia adscendens, Cynodon dactylon, and Pistia stratiotes were dominant in fields without herbicides.
Genetic parameters of yield component and yield in M1 rice (Oryza sativa L.) generation irradiated with gamma-ray
Authors: Riyanto Agus , Oktaviani Eka , Wulansari Nur Kholida , Haryanto Totok Agung Dwi
Published: August 2024

High-yielding varieties are the primary determinant of the success of increasing Indonesia's rice production. Plant breeding for new high-yielding varieties is possible through mutation induction and selecting desired traits. The effectiveness and efficiency of selection require comprehensive genetic parameters. This study aimed to study the genetic diversity, heritability, genetic advance, and relationship between yield components and yield in the M1 generation of mutant rice irradiated with gamma ray. This research used a factorial randomized complete block design, involving gamma irradiation doses of 100 Gy, 150 Gy, and 200 Gy, as the first factor; and the second factor was the rice genotype: UnsoedBDBP, UnsoedBDIU, UnsoedBPIU, UnsoedIUBD, and UnsoedIBP. Each treatment was repeated three times. Results showed that traits with broad genetic variation were tiller number plant-1, grain number panicle-1, and grain yield plant-1. High heritability and genetic advance values were found in plant height, grain number panicle-1, and yield plant-1, indicating that improvement in these traits can be achieved simply through selection methods. Panicle number plant-1 and filled grain percentage panicle-1 showed a unidirectional relationship and directly affected high values on yield plant-1. Therefore, these traits can be considered selection indicators for breeding high-yielding mutant rice.
Effort to gender equality in Indonesia, compared on ASEAN
Authors: Bangun Wilson , Anatan Lina , Calista Cindy
Published: August 2024

This study aims to determine the extent of gender inequality in human resource development in Indonesia against Association of South East Asian Nations (ASEAN). This research using secondary data from various relevant sources. There are five dimensions that and are important for measuring gender equality, namely economic participation, economic opportunities, political empowerment, educational attainment, and health and welfare. The assessment was carried out on Indonesia and other countries in Southeast Asia. The results of the study show that Indonesia has the lowest gender development index (GDI) score compared to the average in ASEAN. Then, gender empowerment measure (GEM) Indonesia increased slowly. The most striking gap is in the income dimension, where men’s income far exceeds women’s income. This happens because women work less than men because women are more traditional in domestic roles in Indonesia, where women are prioritized in managing the household. However, for political indicators, there has been an increase in the number of women in parliament, but the target has not yet reached 30 percent of the total number of women in parliament. This situation shows that there is a reduction in the gender gap in the economy and politics. But the number is still too small, it is necessary to increase the equally distributed equivalent percentage (EDEP) for the Economic Participation Index, Parliamentary Representation Index and Income Index.
Market infrastructure integration and upgrading of resident consumption—Evidence from a panel of Chinese micro households
Authors: Yang Qing , Liu Feini
Published: August 2024

Using long-term household data from the China Family Panel Studies (CFPS), we examine the impact of market infrastructure integration on Chinese residents’ consumption structure improvement. The findings demonstrate that market infrastructure integration not only enhances household consumption but also particularly facilitates this improvement among rural areas and low-income groups. On one hand, market infrastructure integration boosts households’ ability to consume by increasing their income and wage income shares. On the other hand, it stimulates enterprises to invest more in product innovation, thereby enhancing the quality of consumer goods. Additionally, the influence of market infrastructure integration in promoting consumption is bolstered by internet technology and financial inclusion. However, these factors primarily stimulate demand for basic necessities rather than contributing to a shift toward higher-quality products and thus hinder efforts to upgrade the consumption structure.
Regional dimension of the efficiency-support nexus in agriculture: Testing the land value approach in Russia
Authors: Erokhin Vasilii , Samygin Denis , Kulikova Tatyana , Bobryshev Alexey , Kirikutsa Elena , Ryazantsev Ivan , Petricheva Alina
Published: August 2024

State support for agriculture is a crucial tool for adjusting the competitive advantages of agricultural producers to a volatile market environment. In countries with diverse natural conditions for agriculture, however, the allocation of subsidies often focuses on bridging spatial development gaps rather than maximizing the return on inputs. To improve the efficiency of resource use in agriculture, it is essential to tailor subsidy criteria to regional disparities in agricultural potential. Using the example of Russia’s 81 administrative regions, the authors have tested a five-stage methodology for determining the support-generated parameters of output, efficiency, impact, revenue, and profitability. This methodology takes into account both natural and economic factors that contribute to the competitive advantages of each region. The study aims to identify the parts of the performance indicators, such as gross agricultural output and revenue, that are influenced by the amount of subsidies in five different types of territories, which are categorized by the cadastral value of their farmland. It has been found that the allocation of subsidies is not entirely based on the return on the funds allocated. There is a discrepancy between the competitive advantages of these territories in agricultural production and the amount of funds they receive through government support programs. The efficiency of government support differs significantly depending on the type of agricultural product produced in each territory. The approach developed by the authors provides a tool that policy makers can use when tuning the allocation of subsidies based on the differences in the agricultural potential of each territory.
Residents’ attitudes toward the inheritance of intangible cultural heritage in Chinese traditional villages: A case study of Zhaoxing Dong Village
Authors: Shen Huaheng , Yu Lingyun , Aziz Nor Fadzila , Peng Li , Long Yufeng , Luo Yu , Xiang Xiaokang
Published: August 2024

As pivotal agents in traditional villages, residents play a crucial role in the preservation of intangible cultural heritage within these communities. Grounded in the theory of planned behaviour, this study examines residents’ attitudes toward the inheritance of intangible cultural heritage in traditional Chinese villages, using Zhaoxing Dong Village as a case study. To explore these attitudes comprehensively, the research collected questionnaire data from 246 village residents. Analytical methods, including Pearson correlation coefficients and mediation effect tests, were employed to investigate the relationships between residents’ perceptions, their willingness to inherit, their actual inheritance behaviors, and demographic differences. The findings indicated that residents generally exhibited positive attitudes regarding cultural heritage inheritance, however, their actual inheritance behaviors were relatively low. A significant positive correlation was observed among residents’ perceptions of cultural inheritance, their inheritance willingness, and actual inheritance actions, with perceptions exerting a strong positive influence on actual behaviours. This willingness to inherit also partially mediated this relationship. Moreover, factors such as age, educational background, and length of residence were significantly associated with residents’ inheritance perceptions and behaviours. Finally, specific policy and practice recommendations are proposed to promote residents’ broader and more active engagement in cultural heritage inheritance.
Conflict resolution in the customary village governance administration of Baduy, Tengger, and Samin ethnic groups in Indonesia
Authors: Utami Nofi Sri , Katharina Riris , Asrori Asrori , Sacipto Rian , Firmansyah Ardy , Yasin Akhmad , Budiono Arief
Published: August 2024

In Indonesia, the village government organization is part of local democracy. This includes the local democracy in indigenous villages. Indigenous villages have their own customary rules for implementing village elections. They have their own conflict resolution systems in implementing the village government. The implementation of the indigenous village governance leaves conflicts. So, there is a need for a suitable model for resolving problems in the implementation of village elections. The method used in this research is the qualitative research method with the juridical empirical approach. The locus of this research is in the Baduy, Tengger, and Samin indigenous village communities. The conflict resolution model in the administration of the Baduy, Tengger, and Samin customary villages differs in the right mechanism, but in substance, the resolution model is the same, as they use a deliberation model for consensus. In resolving conflicts, indigenous peoples fully submit to traditional leaders. The provincial and the regency/city governments are expected to give greater attention to the conditions of villages with customary government characteristics.
Adaptive leadership of the Indonesian government in handling the COVID-19 Pandemic
Authors: Hadicaksono Wirdhant Hadicaksono , Sugandi Yogi Suprayogi , Sumadinata Widya Setiabudi , Nurasa Heru
Published: August 2024

As a global case, COVID-19 has raised concerns from various circles. To overcome these problems, serious steps are needed, especially from the strategic level that plays an important role in formulating policies. This paper tries to describe the steps taken by the Indonesian government, especially the president as the top leader in handling the COVID-19 pandemic. The method used is qualitative description through references that cover various topics related to the COVID-19 pandemic, especially in terms of strategic decision making by government leaders. Adaptive leadership as a leader’s ability to deal with various challenges in the midst of conditions filled with uncertainty is very important. Decisions taken by the Indonesian government are based on various considerations, such as economic, geographical, cultural and sociological. The research findings show that in the implementation, the President of Indonesia has taken various concrete steps that have major implications on different sectors. This ultimately led the country to achieve success in dealing with the COVID-19 pandemic.
You Want to Foster Creative Behavior? Try Behavioral Sciences Models
Authors: Bonetto Eric , Naczaj Dimitri , Arciszewski Thomas
Published: August 2024

Why do individuals confronted with a specific situation act creatively or not? To answer this question, the psychology of creativity needs to rely on comprehensive behavioral models allowing researchers to better identify the determinants of creative behavior and to be able to efficiently foster this behavior. Behavioral sciences precisely developed behavioral models that allow us to understand and influence a wide variety of behaviors. The present contribution argues for the use of behavioral sciences models in creativity research, and describes three main functions for creativity research: (1) a heuristic function (supporting the development of scientific knowledge about goal-directed creative behavior), (2) an interventional function (supporting the elaboration of efficient behavioral interventions to foster creative behavior), and (3) a categorization function (providing a clearer view of the types of interventions designed to foster specific creative behavior and of the behavioral drivers used).
Breast cancer recognition by electrical impedance tomography implemented with Gaussian relaxation-time distribution (EIT–GRTD)
Authors: Setyawan Galih , Sejati Prima Asmara , Ibrahim Kiagus Aufa , Takei Masahiro
Published: August 2024

The comparison between breast cancer recognition by electrical impedance tomography implemented with Gaussian relaxation time distribution (EIT-GRTD) and conventional EIT has been conducted to evaluate the optimal frequency for cancer detection f
cancer. The EIT-GRTD has two steps, which are 1) the determination of the f
cancer and 2) the refinement of breast reconstruction through time-constant enhancement. This paper employs two-dimensional numerical simulations by a finite element method (FEM) software to replicate the process of breast cancer recognition. The simulation is constructed based on two distinct electrical properties, which are conductivity σ and permitivitty ε, inherent to two major breast tissues: adipose tissues, and breast cancer tissues. In this case, the σ and ε of breast cancer σ
cancer, ε
cancer are higher than adipose tissues σ
adipose, ε
adipose. The simulation results indicate that the most effective frequency for breast cancer detection based on EIT-GRTD is f
cancer = 56,234 Hz. Meanwhile, conventional EIT requires more processing to determine the f
cancer based on image results or spatial conductivity analysis. Quantitatively, both EIT-GRTD and conventional EIT can clearly show the position of the cancer in layers 1 and 2 for EIT-GRTD and only layer 1 for conventional EIT.
The Shifting Landscape: A Holistic View of Migration in Poland, Hungary, and Romania
Authors: Bujor Razvan
Published: August 2024

This comprehensive study delves into the multifaceted dynamics of migration in Eastern Europe, focusing on Poland, Hungary, and Romania. The analysis covers various dimensions, including economic growth, social impacts, and the nuanced interplay between migration and regional development. The paper highlights the diverse experiences of these countries, emphasizing the need for tailored and context-specific policies to address challenges and maximize opportunities. With a keen eye on repatriation trends, the study underscores the pivotal role of inclusive policies and socio-economic frameworks in shaping a sustainable and dynamic future for Eastern Europe. By recognizing migration as a catalyst for both source and destination countries, the research contributes to a deeper understanding of its implications on the socioeconomic dynamics of the region. The conclusions drawn emphasize the importance of embracing diversity, fostering inclusive growth, and promoting social cohesion to cultivate a prosperous and resilient Eastern European landscape.
Korelasi antara Kelekatan Bersaudara dengan Perilaku Altruisme pada Siswa SMA Negeri 4 Banda Aceh
Authors: Pratiwi Putri Nabila , Bakar Abu , Janah Nur
Published: August 2024

Kelekatan bersaudara adalah ikatan emosional antara dua orang atau lebih sedangkan perilaku altruisme adalah perbuatan baik kepada orang lain tanpa pamrih. Dua hal ini ada dua faktor penting pada perkembangan perilaku manusia.Penelitian ini bertujuan untuk mengetahui tingkat dan hubungan antara kelekatan bersaudara dengan perilaku altruisme pada siswa SMA Negeri 4 Banda Aceh.Hipotesis pada penelitian ini adalah adanya hubungan antara perilaku bersaudara dengan perilaku altruisme.Penelitian ini menggunakan pendekatan Mix Methods dengan metode deskriptif korelasi dan Wawancara.Jumlah populasi pada siswa kelas 2 SMA Negeri 4 Banda Aceh berjumlah 268 siswa. Metode pengambilan sample menggunakan rumus slovin untuk menunjukkan jumlah sampel siswa  dengan taraf kesalahan (significance level) sebesar 10%, Maka dengan memasukkan rumus sampel yang didapat adalah 73 siswa. Alat pengumpulan data yang digunakan adalah angket kelekatan bersaudara dan angket perilaku altruisme dalam bentuk skala likert. Hasil penelitian ini menunjukkan tingkat dominan perilaku bersaudara pada siswa SMA 4 Banda Aceh berada pada kategori tinggi dengan persentase 91,8% dan tingkat perilaku altruisme pada siswa SMA 4 Banda Aceh juga dominan pada kategori tinggi dengan persentase 84,9% hasil penelitian ini juga menunjukkan adanya hubungan yang signifikansi positif antara kelekatan bersaudara dengan perilaku altruisme dengan koefisien r = 0,571 dan p= 0.00 artinya semakin tinggi kelekatan bersaudara maka semakin tinggi pula perilaku altruisme. begitupun sebaliknya, apabila kelekatan bersaudara rendah maka perilaku altruisme juga rendah.
Pola Asuh Nenek dan Pengaruhnya Terhadap Perilaku Sosial Emosional Anak
Authors: Purnama Melisa , Mahyiddin Zuraini , Rizka Sitti
Published: August 2024

Penelitian ini bertujuan untuk menjelaskan pola asuh nenek dan implikasinya terhadap perilaku sosial emosional anak di Kabupaten Aceh Tenggara. Faktor yang menyebabkan anak diasuh oleh nenek yaitu orang tua yang bekerja, orang tua janda atau duda karena kematian dan perceraian. Penelitian ini menggunakan pendekatan kualitatif dengan subjek penelitian 5 orang nenek. Data dikumpulkan dengan teknik observasi, wawancara dan dokumentasi. Hasil penelitian menunjukkan bahwa terdapat dua macam pola asuh yang digunakan nenek yaitu pola asuh demokratis dan permisif. Terdapat empat nenek yang menggunakan pola asuh permisif dan 1 orang menerapkan pola asuh demokratis. Perilaku sosial emosional anak dalam pengasuhan nenek cenderung tidak mandiri dan tidak bertanggung jawab, anak juga terkesan manja, tidak dapat mengandalkan dan mengatur dirinya sendiri. Pola asuh nenek dapat mempengaruhi perilaku sosial emosional anak. Penelitian ini diharapkan memberikan manfaat baik bagi pembaca, serta menjadi referensi yang relevan bagi penelitian lainnya terkait pola pengasuhan anak di dalam sebuah keluarga.
NOTES ON RHODODENDRON (ERICACEAE) FROM BALI, INDONESIA, AND A NEW SUBSPECIES OF RHODODENDRON JAVANICUM
Authors: Mambrasar Yasper Michael , Warseno Tri , Kuswantoro Farid , Arifiani Deby
Published: August 2024

In an inventory of Rhododendron species on the island of Bali, Indonesia, three species and two subspecies were recorded. This article presents an identification key to these taxa and brief notes on each taxon. In addition, a new subspecies of Rhododendron javanicum is proposed.
PENYEBAB KEGAGALAN KONSTRUKSI BETON (STUDI KASUS: PROYEK KONSTRUKSI X DI JAKARTA SELATAN)
Authors: Yunita Taysa , Sutandi Arianti
Published: August 2024

In the highrise buildings construction, it’s necessary to pay attention to the quality of the materials to be used, including concrete which is one of the important elements in the building structure. This is because concrete construction is very prone to cracking, the appearance of voids, coarse aggregate that separates from the concrete mixture (segregation), and the amount of water that appears on the surface of the concrete (bleeding) so that it requires handling of concrete construction such as chipping and concreting, strengthening, grouting, and patching or sealing. Therefore, a case study was conducted on construction project X where there were concrete hollows, cracks, segregation, and visible structural reinforcement in several places in the columns, beams and slabs of the 2nd floor and 3rd floor slabs which caused the need for demolition. This study was conducted to determine the effect of the failure of the 2nd floor and 3rd floor concrete on the project completion time. From the study results, it was concluded that there were concrete compressive strength values that didn’t meet the planned strength of fc' 30 MPa based on the results of the core drill test on the beams, columns, and slabs of the 2nd floor.
Abstrak
Dalam pembangunan gedung bertingkat perlu diperhatikan kualitas dari bahan yang akan digunakan, termasuk beton yang menjadi salah satu unsur penting dalam struktur bangunan. Hal tersebut dikarenakan konstruksi beton sangat rawan terhadap retak, munculnya rongga, agregat kasar yang memisah dari campuran beton (segregasi), dan banyaknya air yang muncul pada permukaan beton (bleeding) sehingga dibutuhkan penanganan terhadap konstruksi beton seperti chipping and concreting, strengthening, grouting, dan patching or sealing. Oleh karena itu, dilakukan studi kasus pada proyek konstruksi X dimana terdapat beton yang berongga, retak, segregasi, serta terlihat tulangan struktur di beberapa teMPat pada bagian kolom, balok dan pelat lantai 2 dan pelat lantai 3 yang menyebabkan perlunya pembongkaran. Studi ini dilakukan untuk mengetahui akibat dari kegagalan beton lantai 2 dan lantai 3 terhadap  waktu penyelesaian proyek. Dari hasil studi diperoleh kesimpulan bahwa adanya nilai kuat tekan beton yang tidak memenuhi kuat rencana sebesar fc’ 30 MPa berdasarkan hasil dari core drill test pada balok, kolom, dan pelat lantai 2. Sedangkan untuk kegagalan pada lantai 3 disebabkan oleh lamanya waktu perjalanan truck mixer dari batching plant ke proyek, pelaksanaan pengecoran dan proses pemadatan yang mendekati waktu setting beton serta desain penulangan yang terlalu rapat menyebabkan beton sulit diratakan dengan vibrator.
ANALISIS PERBANDINGAN PRODUKTIVITAS JAM KERJA LEMBUR DAN JAM KERJA NORMAL PADA PEMBANGUNAN GEDUNG ASRAMA HAJI PONTIANAK
Authors: Kunjono Putra Kevin Andrea , Lusiana Lusiana , Rafie
Published: August 2024

In construction projects, unexpected plan changes often necessitate acceleration through the addition of overtime work hours. This study examines productivity comparisons between regular and overtime work hours using the work sampling method with direct field observations. For floor slab reinforcement, the productivity during regular work hours for skilled workers was 45.79 kg/hour/person, while during overtime, it increased to 74.06 kg/hour/person. On average, skilled worker productivity during overtime was 65% higher. Assistant workers exhibited a regular work hour productivity of 30.60 kg/hour/person and 48.56 kg/hour/person during overtime, resulting in a 64% average productivity increase during overtime. During lightweight brick wall installation, skilled workers achieved a regular work hour productivity of 1.41 m²/hour/person, which increased to 1.78 m²/hour/person during overtime, reflecting a 32% average productivity increase. Assistant workers displayed a regular work hour productivity of 1.37 m²/hour/person and 1.61 m²/hour/person during overtime, with an average productivity increase of 22% during overtime. T-tests indicate significant differences in skilled and assistant worker productivity for floor slab reinforcement and significant differences for skilled worker productivity during lightweight brick wall installation. No significant productivity differences were found for other job positions.
Abstrak 
Dalam proyek, terdapat kemungkinan perubahan rencana tak terduga sehingga mendorong perlunya percepatan melalui penambahan jam kerja lembur. Penelitian ini menganalisis perbandingan produktivitas antara jam kerja normal dan lembur menggunakan metode work sampling dengan pengamatan secara langsung di lapangan. Pada pembesian pelat lantai, produktivitas jam kerja normal tukang, adalah 45,79 kg/jam/orang dan 74,06 kg/jam/orang pada jam kerja lembur, rata-rata perbandingan produktivitas tukang adalah 65% lebih tinggi pada jam kerja lembur. Untuk pembantu tukang, produktivitas jam kerja normal adalah 30,60 kg/jam/orang dan 48,56 kg/jam/orang pada jam kerja lembur, rata-rata perbandingan produktivitasnya adalah 64% lebih tinggi pada jam kerja lembur. Pada pemasangan dinding bata ringan, produktivitas jam kerja normal tukang, adalah 1,41 m2/jam/orang dan 1,78 m2/jam/orang pada jam kerja lembur, rata-rata perbandingan produktivitas tukang adalah 32% lebih tinggi pada jam kerja lembur. Untuk pembantu tukang, produktivitas jam kerja normal adalah 1,37 m2/jam/orang dan 1,61 m2/jam/orang pada jam kerja lembur, rata-rata perbandingan produktivitasnya adalah 22% lebih tinggi pada jam kerja lembur. Hasil uji-t menunjukkan terdapat perbedaan signifikan pada nilai produktivitas tukang dan pembantu tukang pada pekerjaan pembesian pelat lantai. Serta terdapat perbedaan signifikan nilai produktivitas tukang pada pekerjaan pemasangan dinding bata ringan. Pada posisi pekerjaan lainnya tidak ada perbedaan produktivitas yang signifikan.
FAKTOR-FAKTOR PENGHAMBAT PENGGUNAAN SEPEDA DI DAERAH GROGOL
Authors: Ricardo Ricardo , Putranto Leksmono Suryo
Published: August 2024

This research aims to explore the factors inhibiting the use of sustainable transportation, particularly bicycles, in the Grogol Region. In the context of sustainable urban development, transportation plays a crucial role, and bicycle use has been identified as a potential solution to reduce the negative impacts of conventional transportation. However, bicycle usage in many areas remains limited and faces complex barriers. This study will delve into factors such as bicycle infrastructure conditions, risk perceptions, travel distance, as well as the cultural and social norms that influence individual decisions to use bicycles. In the context of the Grogol Region, this case study will provide in-depth insights into the specific obstacles faced by bicycle users in this area. Additionally, this research will explore the social, economic, and environmental impacts of restricted bicycle usage. The results of this study are expected to contribute to the formulation of more effective policies to support bicycle use as an integral part of sustainable transportation systems.
 
 
Penelitian ini bertujuan untuk menjelajahi faktor-faktor yang menghambat penggunaan transportasi berkelanjutan, khususnya penggunaan sepeda, di Daerah Grogol. Dalam konteks pembangunan perkotaan yang berkelanjutan, transportasi berperan penting, dan penggunaan sepeda telah diidentifikasi sebagai salah satu solusi yang berpotensi mengurangi dampak negatif transportasi konvensional. Namun, penggunaan sepeda di banyak daerah masih terbatas dan menghadapi hambatan yang kompleks. Penelitian ini akan menggali faktor-faktor seperti kondisi infrastruktur jalur sepeda, persepsi risiko, jarak perjalanan, serta pengaruh budaya dan norma sosial yang mempengaruhi keputusan individu untuk menggunakan sepeda. Dalam konteks Daerah Grogol, kajian kasus ini akan memberikan wawasan mendalam tentang hambatan yang khusus dialami pengguna sepeda di wilayah ini. Penelitian ini juga akan mengeksplorasi dampak sosial, ekonomi, dan lingkungan dari penggunaan sepeda yang terhambat. Hasil dari penelitian ini diharapkan akan memberikan kontribusi untuk merumuskan kebijakan yang lebih efektif dalam mendukung penggunaan sepeda sebagai bagian integral dari sistem transportasi berkelanjutan.
ANALISIS PENGARUH GRADASI UKURAN BUTIRAN KASAR TANAH TERHADAP NILAI KUAT TEKAN
Authors: Reagan Vikent Dior , Sentosa Gregorius Sandjaja
Published: August 2024

In the construction realm, soil plays a crucial role as a primary load-bearing element in buildings, ensuring stability, safety, and resilience. In Indonesia, land scarcity has become a pressing issue, leading to construction projects often being conducted on clayey and silty soils. This research aims to analyze the soil in the Tangerang region, Banten, with the goal of determining the soil's compressive strength and optimum moisture content across various variations in fine particle sizes. The testing procedures involve compaction tests and unconfined compression tests conducted in a laboratory setting. The compaction process is utilized to find values for soil density and optimum moisture content, while the unconfined compression test is employed to ascertain the soil's compressive strength. Fine particle size variations are the key parameters in this research. The results of the analysis are expected to provide insights into the mechanical properties of the soil in the region, enabling more precise and effective construction planning. This research not only encompasses technical aspects but also sheds light on the construction challenges amid the growing issue of land scarcity in Indonesia.
Abstrak
Dalam ranah konstruksi, tanah memegang peran yang sangat penting sebagai salah satu pendukung beban pada bangunan, memastikan kestabilan, keamanan, dan ketahanan pada bangunan. Di Indonesia, lahan sangat terbatas karena itu pembangunan semakin mendesak, yang mengakibatkan pembangunan konstruksi seting dilakukan di atas tanah lempung dan lanau. Penelitian ini dilakukan bertujuan untuk menganalisis tanah di daerah Tangerang, Banten. Dengan tujuan menentukan nilai kuat tekan tanah dan kadar air optimum dengan berbagai variasi ukuran butir halus. Pelaksanaan pengujian yang digunakan melibatkan uji kompaksi dan unconfined compression test pada laboratorium. Proses kompaksi digunakan untuk mencari nilai kepadatan dan kadar air optimum, sementara unconfined compression test digunakan untuk menentukan kuat tekan tanah. Variasi presentase ukuran butir menjadi parameter utama dalam penelitian ini. Hasil analisis diharapkan dapat memberikan pemahaman mengenai tentang sifat-sifat mekanis tanah di daerah tersebut, dan memungkinkan perencanaan konstruksi yang lebih tepat dan efektif. Penelitian ini tidak hanya mencakup aspek teknis, tetapi juga menyoroti tantangan konstruksi di tengah keterbatasan lahan yang semakin menjadi masalah di Indonesia.
POTENSI TANAH EKSPANSIF DI WILAYAH JAKARTA DAN SEKITARNYA
Authors: Levany Odilia Sandrina , Sentosa Gregorius Sandjaja
Published: August 2024

Some of the soil in Jakarta and surrounding areas used to be swamps, former river flows, and piles of organic waste which from year to year formed new layers, resulting in unsavory soil. Soil in Jakarta and its surrounding areas has expansive land potential. Expansive soil is soil that is sensitive to changes in volume, the percentage of granules in the soil can cause the soil to become expansive. Expansive soil can be identified from several values such as index plasticity, activity value, and shrinkage limit. To identification soil, this can be done through the atterbeg limit test and grain size analysis. This research will analyze expansive soil by adding fine grains using the Atterberg limit grain size analysis laboratory test method, analyze several soil investigation reports near the location of the soil sampling point which is less than a distance away than 1 kilometer. The soil that has been tested based on the values obtained has the potential to experience expansive soil, and by analyzing several soil investigations reports it can be said that the soil is expansive.
Abstrak
Sebagian tanah di Jakarta dan sekitarnya dahulunya merupakan rawa, bekas aliran sungai, dan serta timbunan sampah organik yang dari tahun ke tahun membentuk lapisan baru sehingga mengahasilkan tanah yang kurang baik. Maka tanah Jakarta dan sekitarnya memiliki potensi tanah ekspansif. Tanah ekspansif merupakan tanah yang sensitif pada perubahan volume, persentase butiran pada tanah dapat menyebabkan sifat tanah menjadi ekspansif. Tanah ekspansif dapat teridetifikasi dari beberapa nilai seperti plasticity index, nilai activity, dan nilai shrinkage limit. Untuk mendapatkan identifikasi tanah tersebut dapat dilakukan melalui uji atterbeg limit dan grain size analysis. Pada penelitian ini akan menganalisis tanah ekspansif dengan menambahkan butiran halus dengan menggunakan metode uji laboratorium Atterberg limit uji grain size analysis, agar dapat mengetahui perubahan yang dialami tanah tersebut, dan menganalisis beberapa laporan penyelidikan tanah dekat lokasi titik sample tanah, yang berjarak kurang dari 1 kilometer. Tanah yang telah diuji berdasarkan nilai yang didapat berpotensi untuk mengalami tanah ekspansif, dan dengan menganalisis beberapa laporan penyelidikan tanah dapat dikatakan bahwa tanah tersebut mengalami ekspansif.
ANALISIS CHANGE ORDER RATIO PADA PROYEK BENGKEL SPBU
Authors: Mihardja Christian , Waty Mega
Published: August 2024

Vehicles are one of the supporting facilities used for daily activities. Vehicles are usually maintained so that they are always in prime condition and suitable for use in the workshop. Currently, there are many workshops that we can find anywhere. The workshop used to carry out maintenance must go through a construction process. Insufficient planning for workshop projects can result in additional work or change orders. This research aims to determine the value of change orders in the Public Fuel Filling Station (SPBU) workshop project and find the main causes of change orders based on job category. This research uses change order value ratio data from 32 workshop projects in Jabodetabek whose construction took place from November 2022 to March 2023. Based on the results of research and calculations, the average change order ratio value for workshop projects for the work category was 48.614%, where there were The average value of change order ratio in addition is 37.669% and the average value of change orders in subtraction is 10.945%. Electrical and structural work is the work category that is the main cause of change orders.
Abstrak
Kendaraan merupakan salah satu fasilitas pendukung yang digunakan untuk kegiatan sehari-hari. Kendaraan biasannya dilakukan pemeliharaan agar selalu dalam kondisi prima dan layak digunakan di bengkel. Saat ini terdapat banyak bengkel yang dapat kita temui dimanapun. Bengkel yang digunakan untuk melakukan pemeliharaan harus melalui proses pembangunan. Perencanaan pada proyek bengkel yang kurang matang menimbulkan terjadinya pekerjaan tambah kurang atau change order. Tujuan dari penelitian ini untuk menentukan nilai change order pada proyek bengkel Stasion Pengisi Bahan Bakar Umum (SPBU) dan menemukan penyebab utama terjadinya change order bedasarkan kategori pekerjaan. Penelitian ini menggunakan data rasio nilai change order dari 32 proyek bengkel di Jabodetabek yang konstruksinya berlangsung selama November tahun 2022 hingga Maret 2023. Bedasarkan hasil penelitian dan perhitungan, diperoleh nilai rata-rata change order ratio pada proyek bengkel untuk kategori pekerjaan sebesar 48,614% dimana terdapat nilai rata-rata change order ratio in additional sebesar 37,669% dan nilai rata-rata change order in subtraction sebesar 10,945%. Pekerjaan electrical dan structure menjadi kategori pekerjaan yang menjadi penyebab utama change order.
DIGITALISASI METODE KONSTRUKSI PADA PROYEK HIGH-RISE BUILDING
Authors: Silitonga Daniel Maranatha , Hendrawan Stefanus Yobel , Jin Oei Fuk
Published: August 2024

The construction of high-rise buildings is one of the tasks with high levels of risk and complex coordination. Technological innovations such as the internet of things (IoT), 3D printing, virtual reality (VR), artificial intelligence (AI), and building information modeling (BIM) have become solutions in facing the existing risks and challenges. The systematic literature review (SLR) method is used to analyze the development of digital transformation in high-rise building construction projects, so that the extent to which technology can help improve project efficiency, productivity, and quality can be understood. The stages of this SLR method are carried out through literature collection, identification process, and analysis of relevant articles on the discussion topic. Out of the 48 selected literature studies, it is shown that current construction digitalization involves the use of technology 4.0, construction robots, and automatic construction methods. All three have great potential for effective and efficient project management performance, as well as reducing occupational safety risks. However, the implementation of digital technology still faces various challenges, especially in terms of infrastructure provision and skilled human resources.
Abstrak
Proyek konstruksi high-rise building merupakan salah satu pekerjaan dengan tingkat risiko yang tinggi serta koordinasi yang kompleks. Inovasi teknologi seperti internet of things (IoT), 3D printing, virtual reality (VR), artificial intelligence (AI) hingga building information modeling (BIM) telah menjadi solusi dalam menghadapi risiko serta tantangan yang ada. Metode systematic literature review (SLR) digunakan dalam menganalisis perkembangan transformasi digital pada proyek konstruksi high rise building, sehingga dapat diketahui sejauh mana peran teknologi dapat membantu meningkatkan efisiensi, produktivitas, dan kualitas proyek. Tahapan metode SLR ini dilakukan melalui pengumpulan literatur, proses identifikasi, hingga analisis artikel-artikel yang relevan terhadap topik pembahasan. Dari 48 studi literatur yang dipilih, menunjukkan bahwa digitalisasi konstruksi saat ini berupa penggunaan teknologi 4.0, robot konstruksi, serta metode konstruksi otomatis, ketiga hal tersebut memiliki potensi yang besar terhadap kinerja manajemen proyek yang efektif dan efisien, serta dapat mengurangi risiko keselamatan kerja. Meskipun demikian, implementasi teknologi digital masih menghadapi berbagai tantangan khususnya dalam hal penyediaan infrastruktur serta tenaga manusia yang terampil.